I. Key Advantages Completely isotropic
Common molded/pressed graphite has directional properties, with different thermal expansion, strength, and conductivity in different directions; while isostatic pressed graphite has consistent performance in all 360° directions, not deforming or warping at high temperatures, and is suitable for precision vacuum furnaces and single crystal thermal fields.
Ultra-high purity, extremely low ash content
Ash content can be as low as 10-50 ppm, with very few impurities. It does not precipitate or contaminate the workpiece at high temperatures and is suitable for semiconductor, photovoltaic single crystal, lithium battery sintering, and vacuum precision heat treatment.
Top-level high-temperature resistance
It can be used for a long time at 2500°C+ under vacuum/inert atmosphere, with a melting point of 3650°C. It does not soften, creep, or collapse at high temperatures, far exceeding heat-resistant steel and ordinary graphite.
High density, high strength, dense structure
Fine particles and fine structure, high volume density, with bending and compression strengths far higher than ordinary graphite, less prone to chipping, cracking, or breaking.
Excellent thermal shock resistance
Very small thermal expansion coefficient, no cracking under rapid cooling and heating, frequent temperature changes. The cycle service life of vacuum furnaces and sintering furnaces is extremely long.
Uniform and stable heat conduction and conductivity
No directional differences. When used as a heating element, insulation screen, crucible, or tray, the temperature field inside the furnace is uniform, and the consistency of heat treatment/sintering of the workpiece is good.
Strong chemical stability
Resistant to acids, alkalis, and corrosion by molten non-ferrous metals. It does not react with most materials at high temperatures.
High precision and easy processing
Uniform material structure, suitable for turning, milling, engraving, cutting, and can make thin-walled, irregular, high-precision complex graphite parts with easy control of tolerances.
Low porosity and good air tightness
The internal pores are fine and closed, and gases and liquids are not easily permeable. If corrosion and sealing are required, simple impregnation can achieve excellent results.
Two. Obvious disadvantages
High price
The raw materials, isostatic pressing molding, multiple baking and impregnation, and high-purity graphitization processes are complex, and the cost is much higher than molded graphite and pressed graphite.
Not resistant to high temperatures in an oxygen environment
It begins to rapidly oxidize and burn at 600°C in the air. It must be used under vacuum, argon, or nitrogen protection for high-temperature use.
It is still a brittle material
Although its strength is higher than that of ordinary graphite, it is afraid of heavy impacts, knocks, and forced extrusion, and is prone to chipping and cracking.
Difficult to make large specifications and long delivery time
Limited by isostatic pressing equipment, the production of large-sized billets is difficult, and the cost doubles. Customized delivery time is longer than that of ordinary graphite.
Average wear resistance
Not suitable for high-strength friction, wear-resistant parts. It is only suitable for thermal fields, bearing, conductive, and crucible applications.
There are still trace air pores
Even if it is highly dense, there are still tiny air pores. In strong corrosive and strong permeation conditions, it still needs to be impregnated with resin/coal tar for reinforcement and sealing.
High processing loss and much dust
Cutting processing is prone to powder shedding, material utilization is lower than that of metals, and the cost of precision processing is higher.
Three. One-sentence summary
Advantages: Ultra-high purity, uniformity, high-temperature resistance, high strength, excellent thermal shock resistance, no deformation, no contamination, must be used in high-end vacuum furnaces/semiconductors/pv, etc.
Disadvantages: High price, afraid of high-temperature oxidation in air, afraid of impacts, expensive and difficult to order large specifications.
Why choose us?
1.Ultra-high quality: Comprehensive control over every aspect from materials to craftsmanship
2. Efficiency Leadership: Double acceleration in both design and delivery processes
3. Cost reduction and efficiency improvement: Generating substantial profits for the enterprise
4. Customized Adaptation: Meeting the 3D glass requirements in all scenarios
5. Benchmark endorsement: The unanimous choice of global customers
6. Comprehensive Service: Uninterrupted throughout the entire process from placing an order to after-sales support
