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Many buyers get confused when selecting graphite plates for furnace hot zones. Isostatic graphite plate and extruded graphite plate have obvious differences in isotropy, machining performance and stability, which directly affect product yield and maintenance cost. Dongguan Jiecheng Graphite processes both types and offers professional selection advice.
Isostatic Graphite Plate
Features: Isotropic thermal and mechanical properties in all directions. Outstanding thermal shock resistance and excellent flatness retention after repeated thermal cycles. Fine grain structure brings superior edge chipping resistance during grooving and hole machining. Low ash and low porosity grades meet strict purity requirements for semiconductor and crystal-related processes.
Best for: Precision sintering, semiconductor thermal field, thin heat shield plates, plates with complex grooving and high flatness requirements.
Extruded Graphite Plate
Features: Cost-effective, available in large sizes. Thermal conductivity is better along the extrusion direction. It fits static low-load working conditions. Its performance is directional, and cracks are easy to form when thermal stress is uneven. It is not suitable for thin plates and high-precision grooving.
Best for: General furnace simple support plates, thick isolation plates, low-temperature inert atmosphere auxiliary structures with low precision requirements.
Main Application Scenarios
Isostatic graphite plate: Ceramic target sintering, semiconductor heat treatment, PECVD related fixtures, precision thermal field shielding plates.
Extruded graphite plate: Ordinary powder metallurgy sintering base plate, low-load insulation support plate.
Before ordering, confirm your working temperature, load weight, cycle frequency and purity limit. Jiecheng Graphite’s five-axis CNC workshop can finish precise machining for all graphite plates, with full inspection before shipment.
