M125-make ceramic brick based on low-grade clay (loess loam) was obtained using overburden pyrite copper-zinc ore at firing temperature 1000°C. Hematite, magnetite, anorthite, and glass phase appear on firing the ceramic material at temperature 950°C, cristobalite appears at 1000°C. Except for higher content of cristobalite, anorthite, and the glass phase, raising the firing temperature to 1050°C does not lead to special changes. Mullite, which imparts strength to ceramic materials, appears at firing temperature 1100°C.

中文翻译：

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在 950 – 1050°C 温度下，以 Fe2O3 含量较高的原材料为基础的陶瓷材料工艺

使用上覆黄铁矿铜锌矿石在 1000°C 的烧成温度下获得基于低品位粘土（黄土壤土）的 M125 陶瓷砖。在 950°C 的温度下烧制陶瓷材料时会出现赤铁矿、磁铁矿、钙长石和玻璃相，而在 1000°C 时会出现方石英。除了方石英、钙长石和玻璃相含量较高外，将烧成温度提高到 1050°C 不会导致特殊变化。赋予陶瓷材料强度的莫来石出现在 1100°C 的烧制温度下。