{"id":464,"date":"2025-10-06T10:00:00","date_gmt":"2025-10-06T08:00:00","guid":{"rendered":"https:\/\/mxs-refractories.com\/?p=464"},"modified":"2025-10-02T11:29:58","modified_gmt":"2025-10-02T09:29:58","slug":"refractory-products-composition","status":"publish","type":"post","link":"https:\/\/mxs-refractories.com\/de\/refractory-products-composition\/","title":{"rendered":"Die Zusammensetzung feuerfester Produkte verstehen"},"content":{"rendered":"<p>Ever wondered why some refractory products endure extreme heat while others fail? The answer lies in their refractory products composition\u2014a strategic mix of materials, additives, and impurities defining thermal and chemical performance. This article deciphers the roles of Al\u2082O\u2083 in high-alumina bricks, MgO in magnesia-carbon linings, and SiC in non-oxide composites for steelmaking, glass, and reactors. It covers acid-resistant silica, neutral alumina-silicate, and basic magnesia solutions where minor impurities like iron oxides decide success. Learn how <strong>composition mastery transforms raw elements into durable materials<\/strong> surviving 1,500\u00b0C while resisting corrosion and stress.<\/p>\n<ol>\n<li><a href=\"#understanding-building-blocks\">Understanding the building blocks of refractory materials<\/a><\/li>\n<li><a href=\"#fundamental-elements\">The fundamental elements: main components, additives, and impurities<\/a><\/li>\n<li><a href=\"#systematic-classification\">A systematic classification of refractory compositions<\/a><\/li>\n<li><a href=\"#beyond-the-brick-composition-of-specialized-refractory-forms\">Beyond The Brick: Composition Of Specialized Refractory Forms<\/a><\/li>\n<li><a href=\"#how-chemical-composition-translates-to-performance\">How chemical composition translates to performance<\/a><\/li>\n<li><a href=\"#choosing-the-right-composition-for-optimal-refractory-solutions\">Choosing the Right Composition for Optimal Refractory Solutions<\/a><\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/gohmqpvtliqcvxerzehl.supabase.co\/storage\/v1\/object\/public\/images\/vwhq5jlg_refractory-materials-composition.webp\" alt=\"Refractory materials composition diagram showing chemical components and classifications\" \/><\/p>\n<h2 id=\"understanding-building-blocks\">Understanding the building blocks of refractory materials<\/h2>\n<p>The performance of refractory products hinges on their chemical composition\u2014a precise equilibrium where each element plays a critical role. Just as a single weak link can break a chain, even minor imbalances in components like <em>SiO\u2082<\/em> or <em>MgO<\/em> can <strong>compromise structural integrity, corrosion resistance, and thermal stability<\/strong>. A 2% deviation in <em>MgO<\/em> content for magnesia-carbon bricks in steelmaking, for instance, can cut service life by 40%.<\/p>\n<p><strong>Three core elements define refractory behavior<\/strong>: primary components (like <em>Al\u2082O\u2083<\/em> or <em>ZrO\u2082<\/em>) form the material&#8217;s backbone. Additives (mineralizers, stabilizers) refine properties, while unwanted impurities act as silent saboteurs, lowering melting points and accelerating degradation. The <em>Al\u2082O\u2083<\/em>-to-<em>SiO\u2082<\/em> ratio in aluminosilicates, for example, dictates microstructure\u2014higher <em>Al\u2082O\u2083<\/em> content (\u226548%) boosts refractoriness but risks brittleness. Even trace impurities like <em>Fe\u2082O\u2083<\/em> in silica bricks can trigger phase changes under thermal stress.<\/p>\n<p>This article explores how chemical composition shapes performance. From <em>acidic silica-based bricks<\/em> (\u226593% <em>SiO\u2082<\/em>) in glass furnaces to <em>basic magnesia-carbon composites<\/em> (\u226570% <em>MgO<\/em>) for steel ladles, we&#8217;ll decode classification systems and reveal why 70% of global refractory demand in steelmaking depends on oxide ratios. Discover how <em>Cr\u2082O\u2083<\/em> in magnesia-chrome bricks boosts slag resistance via spinel phases, or why <em>ZrO\u2082<\/em>-based materials excel in cement kilns through low thermal conductivity and chemical inertness. The interplay between porosity, composition, and thermal shock resistance highlights how tailored chemistry transforms ordinary materials into high-performance solutions for glass, cement, and metal industries.<\/p>\n<h2 id=\"fundamental-elements\">The fundamental elements: main components, additives, and impurities<\/h2>\n<p>Refractory materials owe their extreme-temperature resilience to precise chemical compositions. Understanding their three core elements\u2014principal components, additives, and impurities\u2014reveals <strong>how engineers balance durability with tailored performance<\/strong>.<\/p>\n<h3 id=\"principal-components\">Principal components: the foundation of performance<\/h3>\n<p>Refractories derive their core properties from principal components, which constitute 50-100% of the material. <strong>These high-melting-point substances form the structural backbone:<\/strong><\/p>\n<ul>\n<li><strong>Oxides<\/strong>: Al\u2082O\u2083 (alumina), SiO\u2082 (silica), MgO (magnesia), CaO (lime), ZrO\u2082 (zirconia)<\/li>\n<li><strong>Non-oxides<\/strong>: SiC (silicon carbide), C (carbon)<\/li>\n<\/ul>\n<p>For instance, silica bricks (\u226593% SiO\u2082) <strong>maintain shape at 1,690\u00b0C<\/strong>, while magnesia bricks (&gt;85% MgO) resist basic slags in steelmaking. Silicon carbide enhances thermal conductivity in glass furnaces.<\/p>\n<h3 id=\"additional-components\">Additional components: tailoring properties with additives<\/h3>\n<p>Engineers add 0.1-10% <strong>additives to fine-tune characteristics<\/strong>. These intentional inclusions include:<\/p>\n<ul>\n<li>Mineralizers: TiO\u2082 accelerates spinel phase formation in alumina-magnesia bricks, <strong>improving densification<\/strong><\/li>\n<li>Inhibitors: MgCO\u2083 stabilizes \u03b2-Al\u2082O\u2083 in corundum castables, <strong>enhancing thermal shock resistance<\/strong><\/li>\n<li>Fluxes: <strong>CaCO\u2083 lowers sintering temperatures<\/strong> but risks increased porosity<\/li>\n<\/ul>\n<p>Such additives enable MXS Refractories <strong>to customize solutions for glass, steel, and cement industries<\/strong> while maintaining structural integrity.<\/p>\n<h3 id=\"impurities\">Impurities: the unavoidable influencing factor<\/h3>\n<p>Unwanted elements from raw materials\u2014like Fe\u2082O\u2083 (iron oxide) and K\u2082O (potassium oxide)\u2014<strong>create hidden vulnerabilities<\/strong>. Even trace amounts (&lt;1%) can:<\/p>\n<ul>\n<li><strong>Lower melting points<\/strong> by forming eutectic phases<\/li>\n<li><strong>Generate liquid phases<\/strong> at operational temperatures<\/li>\n<li><strong>Accelerate chemical attack<\/strong> from corrosive slags<\/li>\n<\/ul>\n<p>For example, Na\u2082O in silica bricks initiates liquid phase formation at 1,000\u00b0C\u2014far below silica&#8217;s 1,713\u00b0C melting point. Contaminants in <a href=\"https:\/\/mxs-refractories.com\/glossary-refractories\/key-raw-materials-in-the-refractory-industry-2\/\">key raw materials<\/a> demand <strong>rigorous quality control to prevent premature failure<\/strong>.<\/p>\n<ul>\n<li><strong>Principal Components<\/strong>: Define the material&#8217;s core identity and high-temperature resistance (e.g., Al\u2082O\u2083, MgO, SiC)<\/li>\n<li>Additives: Intentionally added in small amounts <strong>to modify properties<\/strong> (e.g., stabilizers, fluxes)<\/li>\n<li>Impurities: Unwanted elements from raw materials that degrade performance (e.g., iron oxides, alkalis)<\/li>\n<\/ul>\n<p><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/gohmqpvtliqcvxerzehl.supabase.co\/storage\/v1\/object\/public\/images\/b191bdap_ceramic-composition-components-additives-and-impurities.webp\" alt=\"Ceramic composition diagram showing refractory components\" width=\"600\" height=\"400\" \/><\/p>\n<p>This chemical triad determines whether refractories endure 1,700\u00b0C blast furnaces or succumb to premature spalling. MXS Refractories&#8217; expertise lies in <strong>optimizing this delicate balance<\/strong> for specific industrial environments.<\/p>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/gohmqpvtliqcvxerzehl.supabase.co\/storage\/v1\/object\/public\/images\/vxf49uz0_refractory-compositions-classification.webp\" alt=\"Refractory compositions classification diagram\" width=\"100%\" \/><\/p>\n<h2 id=\"systematic-classification\">A systematic classification of refractory compositions<\/h2>\n<p>Refractory materials form the backbone of high-temperature industrial applications, with their <strong>chemical composition directly determining performance characteristics<\/strong>. Understanding their classification based on chemical nature reveals critical insights into material behavior under extreme conditions. These materials must withstand thermal stress and chemical interactions with slags, making compositional analysis essential for glass, steel, and cement production where corrosion resistance defines operational longevity.<\/p>\n<h3>Oxide-based refractories: the most common families<\/h3>\n<p><strong>Oxide-based refractories dominate industrial applications<\/strong> due \u00e0 leur pr\u00e9visibilit\u00e9 chimique et leur rentabilit\u00e9. Leur cat\u00e9gorisation suit des seuils sp\u00e9cifiques de teneur en oxydes :<\/p>\n<ul>\n<li>Briques siliceuses contiennent plus de 93 % de SiO<sub>2<\/sub>, cr\u00e9ant des mat\u00e9riaux hautement acides <strong>id\u00e9aux pour les fours \u00e0 verre o\u00f9 la r\u00e9sistance aux chocs thermiques<\/strong> est cruciale. Ces briques d\u00e9montrent leur efficacit\u00e9 dans des environnements o\u00f9 la temp\u00e9rature varie rapidement entre 1400\u00b0C et 1600\u00b0C<\/li>\n<li>Produits aluminosilicat\u00e9s incluent des briques d&#8217;argile r\u00e9fractaire (30-48 % Al<sub>2<\/sub>O<sub>3<\/sub>) et des r\u00e9fractaires \u00e0 haute teneur en alumine (&gt;48 % Al<sub>2<\/sub>O<sub>3<\/sub>), passant d&#8217;un comportement acide \u00e0 neutre. Les variantes corindon-mullite montrent une <strong>r\u00e9sistance au fluage exceptionnelle \u00e0 1600\u00b0C<\/strong> gr\u00e2ce \u00e0 leur structure cristalline organis\u00e9e<\/li>\n<li>Solutions \u00e0 base de magn\u00e9sie d\u00e9montrent des caract\u00e9ristiques basiques gr\u00e2ce \u00e0 une teneur sup\u00e9rieure \u00e0 85 % de MgO dans les briques de magn\u00e9sie, tandis que les variantes magn\u00e9sie-chrome combinent plus de 48 % de MgO avec plus de 8 % de Cr<sub>2<\/sub>O<sub>3<\/sub> pour une r\u00e9sistance am\u00e9lior\u00e9e contre la corrosion dans les environnements dynamiques de sid\u00e9rurgie. Ces mat\u00e9riaux forment des phases spinelles complexes lorsqu&#8217;ils interagissent avec les scories, <strong>limitant la p\u00e9n\u00e9tration des impuret\u00e9s<\/strong><\/li>\n<\/ul>\n<div style=\"overflow: auto; max-width: 100%;\">\n<table>\n<caption>Summary of Key Refractory Compositions and Properties<\/caption>\n<tbody>\n<tr>\n<th>Refractory Family<\/th>\n<th>Key Chemical Components<\/th>\n<th>Typical Content (%)<\/th>\n<th>Chemical Nature<\/th>\n<\/tr>\n<tr>\n<td>Silica Bricks<\/td>\n<td>SiO\u2082<\/td>\n<td>&gt; 93%<\/td>\n<td>Acid<\/td>\n<\/tr>\n<tr>\n<td>Fireclay Bricks<\/td>\n<td>Al\u2082O\u2083, SiO\u2082<\/td>\n<td>30-48% Al\u2082O\u2083<\/td>\n<td>Acid to Neutral<\/td>\n<\/tr>\n<tr>\n<td>High-Alumina Bricks<\/td>\n<td>Al\u2082O\u2083<\/td>\n<td>&gt; 48%<\/td>\n<td>Neutral<\/td>\n<\/tr>\n<tr>\n<td>Magnesia Bricks<\/td>\n<td>MgO<\/td>\n<td>&gt; 85%<\/td>\n<td>Basic<\/td>\n<\/tr>\n<tr>\n<td>Magnesia-Chrome Bricks<\/td>\n<td>MgO, Cr\u2082O\u2083<\/td>\n<td>&gt; 48% MgO, &gt; 8% Cr\u2082O\u2083<\/td>\n<td>Basic to Neutral<\/td>\n<\/tr>\n<tr>\n<td>Carbon Bricks<\/td>\n<td>C<\/td>\n<td>20-90%<\/td>\n<td>Neutral<\/td>\n<\/tr>\n<tr>\n<td>Zirconia Refractories<\/td>\n<td>ZrO\u2082, stabilizers<\/td>\n<td>Variable<\/td>\n<td>Neutral<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Les solutions oxydes avanc\u00e9es comme la zircone (ZrO\u2082) n\u00e9cessitent des stabilisateurs tels que CaO ou MgO pour <strong>maintenir la structure cristalline \u00e0 haute temp\u00e9rature<\/strong>. Ces mat\u00e9riaux d\u00e9montrent une r\u00e9sistance aux transformations de phase cruciale pour les environnements \u00e0 chocs thermiques. La zircone stabilis\u00e9e \u00e0 la chaux maintient sa phase cubique jusqu&#8217;\u00e0 2400\u00b0C, tandis que les variantes stabilis\u00e9es \u00e0 la magn\u00e9sie offrent une meilleure r\u00e9sistance \u00e0 la corrosion dans les applications m\u00e9tallurgiques gr\u00e2ce \u00e0 une matrice plus dense.<\/p>\n<h3 id=\"non-oxide-refractories\">Non-oxide and carbon-based refractories<\/h3>\n<p>Pour des conditions extr\u00eames o\u00f9 les mat\u00e9riaux oxydes atteignent leurs limites, les <strong>r\u00e9fractaires non-oxydes offrent des avantages distinctifs<\/strong>. Leur structure mol\u00e9culaire permet une conductivit\u00e9 thermique exceptionnelle et une non-mouillabilit\u00e9 par les m\u00e9taux fondus, emp\u00eachant la p\u00e9n\u00e9tration structurelle par action capillaire.<\/p>\n<ul>\n<li>Mat\u00e9riaux \u00e0 base de carbone utilisent 20 \u00e0 90 % de graphite ou de coke, cr\u00e9ant des surfaces neutres r\u00e9sistant \u00e0 la p\u00e9n\u00e9tration m\u00e9tallique. Le ratio graphite\/cok influence directement la conductivit\u00e9 thermique, avec un m\u00e9lange 70\/30 <strong>atteignant 18-22 W\/m\u00b7K tout en maintenant une r\u00e9sistance m\u00e9canique<\/strong> sup\u00e9rieure \u00e0 35 MPa<\/li>\n<li>Carbure de silicium (SiC) combine <strong>une conductivit\u00e9 thermique \u00e9lev\u00e9e avec une r\u00e9sistance \u00e0 l&#8217;oxydation<\/strong> jusqu&#8217;\u00e0 1600\u00b0C, rendue possible par des liaisons covalentes fortes et une structure cristalline hexagonale. Ces propri\u00e9t\u00e9s en font un choix prioritaire pour les \u00e9changeurs de chaleur et les \u00e9quipements d&#8217;industries chimiques<\/li>\n<li>C\u00e9ramiques sialon (\u00e0 base de Si\u2083N\u2084) d\u00e9montrent une <strong>r\u00e9sistance sup\u00e9rieure au fluage \u00e0 des temp\u00e9ratures d\u00e9passant 1400\u00b0C<\/strong> gr\u00e2ce aux avantages de la phase \u03b2-sialon, offrant 40 % de r\u00e9sistance thermique en plus par rapport au nitrure de silicium conventionnel<\/li>\n<\/ul>\n<p>Ces mat\u00e9riaux suivent des sch\u00e9mas de performance o\u00f9 une teneur plus \u00e9lev\u00e9e en carbone am\u00e9liore la r\u00e9sistance aux chocs thermiques mais r\u00e9duit la r\u00e9sistance m\u00e9canique, tandis que les combinaisons carbure-nitrure optimisent \u00e0 la fois l&#8217;int\u00e9grit\u00e9 structurelle et la stabilit\u00e9 thermique. L&#8217;expertise de MXS Refractories dans ces compositions sp\u00e9cialis\u00e9es permet des <strong>solutions adapt\u00e9es l\u00e0 o\u00f9 les mat\u00e9riaux oxydes conventionnels \u00e9chouent<\/strong>. Par exemple, les composites \u00e0 base de carbure de silicium avec ajout de zircone am\u00e9liorent la r\u00e9sistance \u00e0 l&#8217;\u00e9rosion de 60 % dans les rev\u00eatements de fours \u00e0 cyclone gr\u00e2ce \u00e0 des m\u00e9canismes de d\u00e9viation des fissures.<\/p>\n<h2 id=\"beyond-the-brick-composition-of-specialized-refractory-forms\">Beyond The Brick: Composition Of Specialized Refractory Forms<\/h2>\n<h3>The makeup of refractory coatings and mortars<\/h3>\n<p>Refractory coatings and mortars are engineered not just for thermal resistance but for application precision. Their composition hinges on specialized binders like calcium aluminate cements or phosphates, ensuring adhesion and structural integrity. Fine fillers\u2014often silica or alumina powders\u2014fill micro-gaps, creating a protective barrier. Unlike traditional bricks, these materials require ultra-fine granulometry to ensure smooth application and bonding, critical for high-stress environments like glass or steel manufacturing.<\/p>\n<h3>Composition of advanced refractory composites and monolithics<\/h3>\n<p>Advanced composites and monolithic refractories <strong>redefine performance in extreme conditions<\/strong>. Their core lies in a ceramic matrix, such as alumina or silicon carbide (SiC), paired with reinforcing agents like ceramic fibers or carbon particles. These elements combat mechanical stress, preventing catastrophic failure. For monolithics like castables, the blend of aggregates, binders, et al. is optimized for flow and setting. <a href=\"https:\/\/mxs-refractories.com\/glossary-refractories\/definition-of-monolithic-refractories\/\">Monolithic refractories<\/a> exemplify adaptability, balancing chemical stability with workability.<\/p>\n<ul>\n<li><strong>Specialized Binders<\/strong>: Calcium aluminate cements and phosphates ensure cohesion in coatings and monolithics, adapting to thermal cycling.<\/li>\n<li><strong>Reinforcing Agents<\/strong>: Steel or ceramic fibers enhance toughness, delaying crack propagation in composites.<\/li>\n<li><strong>Functional Fillers &amp; Additives<\/strong>: Silica fume or bentonite adjust rheology, shrinkage, and thermal expansion, optimizing performance.<\/li>\n<\/ul>\n<p>Additives and impurities play dual roles: while minor additions improve workability or thermal shock resistance, impurities like alkali oxides can weaken bonds, urging strict raw material control. MXS Refractories leverages these principles to tailor solutions for industries where failure is not an option\u2014<strong>proving that innovation lies beyond the brick<\/strong>.<\/p>\n<h2 id=\"how-chemical-composition-translates-to-performance\">How chemical composition translates to performance<\/h2>\n<p>The <strong>performance of refractory products hinges on their chemical composition<\/strong>. Each element serves a specific purpose, aligning with the environmental demands of high temperatures, chemical exposure, and mechanical stress. For instance, refractories with high Al\u2082O\u2083 content excel in environments requiring exceptional refractoriness and structural integrity under load. These materials maintain stability even at temperatures exceeding 1770\u00b0C, making them ideal for steelmaking and cement kilns.<\/p>\n<p>MgO-rich compositions, such as magnesia-carbon bricks, are engineered to withstand basic slags\u2014a common challenge in steel production. Their resistance to iron-rich environments <strong>ensures longevity in metallurgical furnaces<\/strong>. Similarly, the inclusion of carbon (graphite) in these bricks enhances thermal shock resistance and prevents wetting by molten metals, reducing erosion and improving efficiency.<\/p>\n<ul>\n<li><strong>High Alumina (Al\u2082O\u2083)<\/strong>: Leads to superior refractoriness and load-bearing capacity.<\/li>\n<li><strong>High Magnesia (MgO)<\/strong>: Provides excellent resistance to basic slags and high-iron environments.<\/li>\n<li><strong>High Silica (SiO\u2082)<\/strong>: Offers great strength under load at high temperatures in acidic environments.<\/li>\n<li><strong>Carbon (C) &amp; Silicon Carbide (SiC)<\/strong>: Deliver exceptional thermal shock resistance and non-wettability.<\/li>\n<\/ul>\n<p>ZrO\u2082 (zirconia) stands out for its ultra-high service temperatures (up to 2200\u00b0C) and low thermal conductivity. Stabilized zirconia grades, like yttria-partially stabilized zirconia (Y-PSZ), resist degradation in oxidizing environments, making them critical for gas turbines and thermal barrier coatings. Their <strong>ability to maintain structural integrity under extreme thermal cycling<\/strong> underscores their role in demanding applications.<\/p>\n<p>Additives and impurities further refine performance. Small quantities of silicon carbide (SiC) in carbon-bonded refractories amplify thermal conductivity and oxidation resistance. Conversely, impurities like alkalis in silica bricks can lower refractoriness, emphasizing the need for precise compositional control. By tailoring these elements, <strong>refractories achieve tailored performance<\/strong>, whether in glass furnaces, steel ladles, or petrochemical reactors.<\/p>\n<h2 id=\"choosing-the-right-composition-for-optimal-refractory-solutions\">Choosing the Right Composition for Optimal Refractory Solutions<\/h2>\n<p>The performance of refractory materials is inherently tied to <strong>their chemical composition<\/strong>. Understanding the interplay of major oxides like Al\u2082O\u2083, SiO\u2082, and MgO, alongside minor additives, is critical for ensuring structural integrity and efficiency in high-temperature environments. Even trace impurities from raw materials can compromise properties like thermal stability or corrosion resistance, making precise compositional analysis non-negotiable for industrial applications. This foundational knowledge directly impacts durability under extreme conditions.<\/p>\n<p>Selecting the ideal refractory solution demands more than generic choices. Each application\u2014whether in steelmaking, glass production, or cement processing\u2014requires <strong>tailoring the chemical profile to counter specific challenges<\/strong>: thermal shock, abrasive wear, or chemical corrosion. For instance, silica-based products excel in acidic environments, while magnesia-carbon bricks resist basic slags. Additives like chromia or zirconia further refine properties, enabling materials to withstand harsher operational demands through controlled phase transformations or enhanced sintering.<\/p>\n<p>Leveraging decades of expertise, <a href=\"https:\/\/mxs-refractories.com\/\">MXS Refractories<\/a> delivers <strong>customized refractory systems engineered for precision<\/strong>. By aligning compositional science with industry-specific challenges\u2014such as optimizing alumina purity for steel ladels or integrating carbon matrices for thermal shock resistance\u2014we ensure materials perform reliably. Explore our <a href=\"https:\/\/mxs-refractories.com\/glossary-refractories\/\">refractory glossary<\/a> to decode technical terminology and deepen your understanding of material selection criteria.<\/p>\n<p>The performance of refractory materials is <strong>fundamentally rooted in their composition<\/strong>. By balancing principal components, additives, and managing impurities, industries can <strong>tailor solutions for extreme conditions<\/strong>. Selecting the right composition ensures <strong>durability in high-temperature environments<\/strong>. For expert guidance on refractory selection, visit [MXS Refractories](https:\/\/mxs-refractories.com\/) and explore our comprehensive [refractory glossary](https:\/\/mxs-refractories.com\/<strong>glossary-refractories<\/strong>\/).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ever wondered why some refractory products endure extreme heat while others fail? The answer lies in their refractory products composition\u2014a strategic mix of materials, additives, and impurities defining thermal and chemical performance. This article deciphers the roles of Al\u2082O\u2083 in high-alumina bricks, MgO in magnesia-carbon linings, and SiC in non-oxide composites for steelmaking, glass, and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[20,17],"tags":[],"class_list":["post-464","post","type-post","status-publish","format-standard","hentry","category-materials-properties","category-refractory-basics"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/posts\/464","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/comments?post=464"}],"version-history":[{"count":2,"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/posts\/464\/revisions"}],"predecessor-version":[{"id":466,"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/posts\/464\/revisions\/466"}],"wp:attachment":[{"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/media?parent=464"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/categories?post=464"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxs-refractories.com\/de\/wp-json\/wp\/v2\/tags?post=464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}