After experimenting for eight days, he discovered that firing powdered graphite with clay would work, and the hardness of the pencil lead could be varied by varying the ratio of graphite to clay.

他做了八天实验，发觉把石墨粉末和黏土一起烧，就可奏效。笔芯的硬度还会依石墨和黏土的比例而改变。

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Thermal conductivity material was prepared with acrylate copolymer (acr) used as modifier for chlorinated PVC (CPVC) and superfine powdered graphite used as filler.

使用丙烯酸酯共聚物(acr)作为氯化聚氯乙烯(cpvc)的改性剂，使用超微细石墨粉体做填料，制备了具有导热性能的共混材料。

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