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When configuring or replacing the furnace hot zone, many buyers struggle to choose between thermal fields built from isostatic graphite and extruded graphite. The material difference determines temperature uniformity, service life, maintenance frequency and overall production cost. Dongguan Jiecheng Graphite supplies both solutions and offers professional material matching suggestions based on your process.
Isostatic Graphite Thermal Field
Features: Isotropic thermal and mechanical properties in all directions. High compressive strength and excellent edge retention; thin heating strips and shielding plates are not easy to crack or chip after frequent thermal cycles. Stable resistivity ensures balanced heat generation. Low open porosity and low ash content meet high-purity requirements.
Best for: Photovoltaic monocrystalline furnaces, semiconductor crystal growth, high-cycle precision sintering furnaces, thermal fields with complex thin-wall heating structures.
Extruded Graphite Thermal Field
Features: Cost-effective and suitable for static low-load thermal structures. Good thermal conductivity along the extrusion direction. It can be processed into large-size supporting blocks and simple insulation parts. Its performance is directional, and it is more prone to cracking under uneven thermal stress.
Best for: General powder metallurgy sintering, low-temperature vacuum heat treatment, non-critical support and insulation components inside the hot zone.
Main Application Scenarios
Isostatic graphite thermal field: PV silicon crystal growth, SiC crystal furnace, MIM precision sintering, advanced ceramic sintering.
Extruded graphite thermal field: Ordinary vacuum brazing furnace, low-load sintering furnace auxiliary supports and insulation assemblies.
Before placing an order, confirm your maximum working temperature, cycle frequency, purity requirement and temperature uniformity tolerance. Jiecheng Graphite’s engineering team can evaluate your furnace and recommend the most cost-effective graphite thermal field scheme. We complete integrated processing and matching of all thermal field spare parts for global customers.
