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CN102206080B 太阳能光伏产业单晶硅生长热场用石墨材料及其制造方法 失效 - 权利终止

太阳能光伏产业单晶硅生长热场用石墨材料及其制造方法
摘要：
本发明涉及一种太阳能光伏产业单晶硅生长热场用石墨材料，所述石墨材料的原料中，骨料为煅后石油焦，所述煅后石油焦的真密度≥2.1g/cm3，灰分≤0.3％，粘结剂为中温沥青，所述中温沥青的软化点为83～86℃，结焦值≥49％。所述石墨材料的体积密度≥1.80g/cm3，电阻率≤7.0μΩm，抗压强度≥38MPa，抗折强度≥18Mpa，气孔率≤14％，灰分≤0.2％，热膨胀系数≤2*10-6/℃。该石墨材料的制备方法包括以下步骤：原料的破碎、筛分、配料、混捏、成型、一次焙烧、一次浸渍、二次焙烧、二次浸渍、三次焙烧、以及石墨化得到成品。
摘要（英）：

The invention relates to a graphite material for a monocrystalline silicon growth thermal field in a solar photovoltaic industry. In the graphite material, an aggregate is calcined petroleum coke, wherein the true density of the calcined petroleum coke is more than or equal to 2.1g/cm <3>, and the ash content of the calcined petroleum coke is less than or equal to 0.3%; a binder is medium temperature pitch, wherein the softening point of the medium temperature pitch is 83-86 DEG C, and the coking value of the medium temperature pitch is more than or equal to 49%; and the volume density of the graphite material is larger than or equal to 1.80g/cm<3>, the resistivity of the graphite material is less than or equal to 7.0 mu omega m, the compression strength of the graphite material is larger than or equal to 38Mpa, the rupture strength of the graphite material is more than or equal to 18Mpa, the porosity of the graphite material is less than or equal to 14%, the ash content of the graphite material is less than or equal to 0.2%, and the thermal expansion coefficient of the graphite material is less than or equal to 2*10<-6>/DEG C. The preparation method of the graphite material comprises the following steps: smashing raw materials, sieving, burdening, kneading, molding, primarily roasting, secondarily roasting, secondarily dipping, and thirdly roasting; and graphitizing, thus obtaining a finished product.

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