Cold isostatic pressed grahite has the characteristics of large sizes available, even-textured and isotropy. It also has advantage of high density, fine grain size, high purity, high strength, low specific resistance, high mechnial strength, easy precision machining, excellent thermal shock resistance, high temperature resistance, and oxidation resistance with good anti-corrosion Application: It is used for making heating element (crucible, heater, guide cylinder, protective cover) ofmonocrystalline siliconCzochralski furnace’s thermal field in photovoltaic industry, EDM machining, making large sized mould, heating elements in large industrial furnace and vacuum furnace, large precision casting mould, and used as high temperature gas-cooled reactorcorestructure graphite for nuclear industry.
There are two grades for isostatic graphite: BTG-16 and BTG-18, and the technical specifications are as below:
Technical Specification
|
Technical Specification |
BTG-16 |
BTG-18 |
|
Bulk Density g/cm3 |
≥ 1.75 |
≥1.85 |
|
Grain Size µm |
≤43 |
≤30 |
|
Ash PPM |
≤ 700 |
≤700 |
|
Specific Resistance μΩ-m |
≤15 |
≤12 |
|
Flexural Strength Mpa |
≥25 |
≥45 |
|
Compressive Strength Mpa |
≥ 35 |
≥70 |
|
Shore Hardness |
≥50 |
≥55 |
|
Coefficient of Thermal Expansion |
≤4.0 |
≤4.0 |
|
Young's modulus Gpa |
≥10.5 |
≥10.5 |
Note: 1. Ash content of all grades can be purified to 50 PPM. 2. Special property requirement specially produced.
Size of isostatic graphite:
Note: 1. The details above arereference sizes, if there exit some error. The sizes are subject to actual measurement. 2. Special sizes and properties can be produced. 3. Larger sizes are specially pressed and smaller sizes machined. Machined parts fabricated to drawings with anti-oxidation and anti-corrosion cover available.