其次，在该预制件体系中通过添加导热系数较低的原料，提高内衬材料的保温性能。
Secondly, in the prefabricated system, through the addition of raw materials with lower heat conduction coefficient, raising warming performance of lining material.
钙长石具有较低的导热系数，莫来石具有较高的耐火度，是有较好发展前景的耐火材料。
Anorthite has low thermal conductivity and mullite has high refractoriness. Those properties make them famous in refractory.
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