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