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Carbon material

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专利汇可以提供Carbon material专利检索,专利查询,专利分析的服务。并且PURPOSE:To obtain a carbon material having long life, by specifying the bulk density, apparent pore ratio and air permeability of the carbon material. CONSTITUTION:The objective carbon material has a bulk density of 1.5-2.0g/cm , an apparent pore ratio of 0.1-7.0% and an air permeability of 0-1.0X10 ml.cm/cm .sec.cm. The excessive graphitization can be prevented by the bulk density of 1.5-2.0g/cm . The apparent pore ratio of 0.1-7.0% prevents the excessive increase of the gaps between particles and, accordingly, excessive lowering of the bonding force. The air permeability is restricted to ml.cm/cm .sec.cm because a dense low-density carbon is formed in the pore existing in the carbon material and the formed carbon minimizes the amount of gases generated from a graphite crucible in the pulling up of a silicon single crystal to keep the pulled up silicon ingot from undesirable effects.,下面是Carbon material专利的具体信息内容。

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