{"id":554,"date":"2026-03-12T10:00:03","date_gmt":"2026-03-12T09:00:03","guid":{"rendered":"https:\/\/mxs-refractories.com\/?p=554"},"modified":"2026-03-11T15:13:22","modified_gmt":"2026-03-11T14:13:22","slug":"why-residual-quartz-should-be-1-in-silica-refractory-bricks","status":"publish","type":"post","link":"https:\/\/mxs-refractories.com\/de\/why-residual-quartz-should-be-1-in-silica-refractory-bricks\/","title":{"rendered":"Warum der Restquarz < 1% in Silika-Feuerfeststeinen betragen sollte?"},"content":{"rendered":"
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In silica refractory bricks<\/a> used in glass furnaces<\/strong>, controlling the amount of residual quartz<\/strong> is critical. This is why technical specifications generally require less than 1% residual quartz<\/strong>.<\/p>\n

1. A phase transformation that generates dangerous volume changes<\/h3>\n

Quartz undergoes a crystallographic transformation from \u03b1-quartz to \u03b2-quartz at 573 \u00b0C<\/strong>.<\/p>\n

This transformation produces a sudden volume change (\u22480.8%)<\/strong>.<\/p>\n

In a brick already installed in a glass furnace, this can:<\/p>\n