Since the granulated blast furnace slag contains {TAIL ~ CaO} by an amount of from 42 to 45% by weight, the ceramic material containing the granulated blast furnace slag as its principal component can be produced at the baking temperature lower than that of a ceramic material containing alumina or silica as {HEAD ~ its principal component} 
Since the granulated blast furnace slag contains { TAIL ~ CaO } by an amount of from 42 to 45 % by weight , the ceramic material containing the granulated blast furnace slag as its principal component can be produced at the baking temperature lower than that of a ceramic material containing alumina or silica as { HEAD ~ its principal component }
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