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炭笔和铅笔的区别是什么
更新时间: 2020-11-03 00:00:00  

炭笔和铅笔的区别差别:铅笔因内芯主要材料是石墨,因此用起来更加流畅舒适,易于被橡皮修改;而炭笔较为粗糙,线条力度感较强。由于其笔芯与纸的摩擦力大,其痕迹不易被橡皮拭去。

石墨(graphite)是一种结晶形碳。六方晶系,为铁墨色至深灰色。密度2.25克/厘米3,硬度1.5,溶点3652℃,沸点4827℃。质软,有滑腻感,可导电。化学性质不活泼,耐腐蚀,与酸、碱等不易反应。在空气或氧气中加强热,可燃烧并生成二氧化碳。强氧化剂会将它氧化成有机酸。用作抗摩剂和润滑材料,制作坩埚、电极、干电池、铅笔芯。高纯度石墨可在核反应堆上作中子减速剂。常被称为炭精或黑铅,因为以前被误认为是铅。

关键词: 铅笔 别是 什么

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