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Preparation method of graphite thermal field material for czochralski silicon crystal furnace
The invention relates to the technical field of graphite thermal fields, in particular to a preparation method of a graphite thermal field material for a Czochralski silicon crystal furnace. An aggregate is needlelike petroleum coke; a powder is graphene, pitch coke, carbon black and carbon fibers; a binder is modified medium-temperature coal pitch; and an impregnating agent is impregnating asphalt. The selection of the raw materials is reasonable, and the preparation process is scientific; the prepared graphite thermal field material for the czochralski silicon crystal furnace is uniform andfine in structure and high in volume density; the physical and chemical indexes of graphite are excellent; the volume density of the graphite thermal field material is larger than or equal to 2.0 g/cm<3>, the resistivity is smaller than or equal to 6.0 mu omega m, the breaking strength is larger than or equal to 32 Mpa, the compressive strength is larger than or equal to 65 Mpa, the porosity is smaller than or equal to 10%, the ash content is smaller than or equal to 0.2%, and the thermal expansion coefficient is smaller than or equal to 2 * 10 <-6 >/DEG C.
本发明涉及石墨热场技术领域，更具体而言，涉及一种直拉单晶硅炉用石墨热场材料制备方法，骨料为针状石油焦；粉料为石墨烯、沥青焦、炭黑、碳纤维；粘结剂为改质中温煤沥青；浸渍剂为浸渍沥青，中原料选择合理，制备工艺科学；所制备的直拉单晶硅炉用石墨热场材料结构均匀细腻，体积密度高；石墨理化理指标优良；石墨热场材料的体积密度≥2.0g/cm，电阻率≤6.0μΩm，抗折强度≥32Mpa，抗压强度≥65Mpa，气孔率≤10%，灰分≤0.2%，热膨胀系数≤2*10/℃。
Preparation method of graphite thermal field material for czochralski silicon crystal furnace
The invention relates to the technical field of graphite thermal fields, in particular to a preparation method of a graphite thermal field material for a Czochralski silicon crystal furnace. An aggregate is needlelike petroleum coke; a powder is graphene, pitch coke, carbon black and carbon fibers; a binder is modified medium-temperature coal pitch; and an impregnating agent is impregnating asphalt. The selection of the raw materials is reasonable, and the preparation process is scientific; the prepared graphite thermal field material for the czochralski silicon crystal furnace is uniform andfine in structure and high in volume density; the physical and chemical indexes of graphite are excellent; the volume density of the graphite thermal field material is larger than or equal to 2.0 g/cm<3>, the resistivity is smaller than or equal to 6.0 mu omega m, the breaking strength is larger than or equal to 32 Mpa, the compressive strength is larger than or equal to 65 Mpa, the porosity is smaller than or equal to 10%, the ash content is smaller than or equal to 0.2%, and the thermal expansion coefficient is smaller than or equal to 2 * 10 <-6 >/DEG C.
本发明涉及石墨热场技术领域，更具体而言，涉及一种直拉单晶硅炉用石墨热场材料制备方法，骨料为针状石油焦；粉料为石墨烯、沥青焦、炭黑、碳纤维；粘结剂为改质中温煤沥青；浸渍剂为浸渍沥青，中原料选择合理，制备工艺科学；所制备的直拉单晶硅炉用石墨热场材料结构均匀细腻，体积密度高；石墨理化理指标优良；石墨热场材料的体积密度≥2.0g/cm，电阻率≤6.0μΩm，抗折强度≥32Mpa，抗压强度≥65Mpa，气孔率≤10%，灰分≤0.2%，热膨胀系数≤2*10/℃。
Preparation method of graphite thermal field material for czochralski silicon crystal furnace
一种直拉单晶硅炉用石墨热场材料制备方法
WEI JIAN (Autor:in) / ZHANG JINJUN (Autor:in) / MIN JIE (Autor:in) / ZHANG PEILIN (Autor:in) / PANG ZHONGHAI (Autor:in) / WU JIANJUN (Autor:in) / LIU WEIKAI (Autor:in) / JI YONGLIANG (Autor:in) / LEI TAO (Autor:in) / HUO YOU (Autor:in)
12.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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