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The growth of silicon crystal need the graphite crucible,graphite parts etc.graphite material,and the isostatic graphite material is one of the most important material in the world now. The isostatic graphite material is made in a high pressure container,and use the liquid media with an un-pressed property and the uniform delivery pressure property. As it will press the material from all the directions,so the pressure will be the same from all the directions. The isostatic graphite material from Japan meet the world advanced level,no matter the quality,items,specification etc, the most representative company is TOYO Carbon. And the U.S is the first country to do the business and research on the isostatic graphite material. Another one is SGL from Germany,and except for…
The natural graphite can be devided into two kinds,one is natural flake graphite powder,and another one is aphanitic graphite powder,the classification is according to the crystallization morphology. The crystal diameter of the graphite >1μm is called natural flake graphite, and it can be seen the crystal structure by naked eye or ordinary microscope;and another type with the crystal diameter of the graphite <1μm,and it’s hard to see the crystal structure under the microscope,so it’s called aphanitic graphite powder,and most aphanitic graphite powder sharp as the earth,so it is also called amorphous graphite. According to the size of the scale,the flake graphite powder can be classified as different grade,the particle size>+0.3mm,+0.18mm and+0.15mm,it’s called large scale graphite powder,and the size below 0.15mm,it’s…
The production technology of the isostatic graphite is different from the graphite electrode. The isostatic graphite need the raw material which has an isotropic structure property. It need to grind into finer powder,and use the cold press molding technology(the isostatic press molding is one kind of the the cold press molding) the baking cycle is very long,and for the high density,it need more times’ dipping and baking.and the graphitization cycle is more than normal graphite. The main technology mainly includes: 1) raw material grinding the particle size need to processed into 20 μm below. For now,the finest isostatic graphite particle size is 1μm,and it must need the superfine mill. 2) the kneading processing make the powder and coal asphalt adhesive…
