檢視青砖的原始碼

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| style="background: #FF2400" align= center|  '''<big>青砖 </big>'''
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青砖是粘土烧制的，粘土是某些[[铝硅酸矿物]]长时间风化的产物，具有极强的粘性而得名。将粘土用水调和后制成砖坯，放在砖窑中煅烧（900℃-1100℃,并且要持续8-15小时）便制成砖。粘土中含有铁，烧制过程中完全氧化时生成三氧化二铁呈红色，即最常用的红砖；而如果在烧制过程中加水冷却，使粘土中的铁不完全氧化（Fe3O4)则呈青色，即[[青砖]]。