Shandong Huaci International Trade Co., Ltd. is one of the leading manufacturers and suppliers of polycrystalline fiber board in China, featured by quality products and good service. Welcome to wholesale custom made polycrystalline fiber board at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.
Product Overview
Polycrystalline Fiber Board is a rigid, machinable panel made from polycrystalline mullite fibre with a small inorganic binder system. It is the board grade for ultra-high-temperature furnace and kiln hot-face construction where the lining has to hold its flatness, accept mechanical fixings and survive thousands of heat cycles without dusting or cracking.
The board is produced by wet forming and is then dried and high-temperature treated to lock the structure in place. The result is a dense, stable panel that machines cleanly with standard tooling, takes standard anchors and threads, and keeps its tolerance in service at temperatures that would destroy any aluminosilicate board.
Key Features
- 1600 C classification: long-term service well above the ceiling of aluminosilicate or AES boards.
- Rigid and machinable: cuts, drills, mills and threads on standard metalworking equipment.
- Tight dimensional tolerance: thickness tolerance within +/- 0.5 mm, suitable for assembled hot-face panels.
- Low thermal conductivity: stable insulating value across the full service range.
- High compressive strength: 0.4-0.6 MPa typical, enough to take mechanical fixings and surface loads.
- Low dust and shedding: clean surface for laboratory and clean-room furnace applications.
Technical Specifications
|
Classification temperature |
1600 C; long-term service up to 1500 C. |
|
Chemical composition |
Al2O3 72-78%, SiO2 22-28%. |
|
Density |
280-400 kg/m3. |
|
Thermal conductivity (1000 C) |
<= 0.20 W/(m.K) at 320 kg/m3. |
|
Compressive strength |
0.4-0.6 MPa. |
|
Standard size |
1000 x 600 mm; thickness 20 / 25 / 30 / 40 / 50 mm; custom thicknesses on request. |
Application Scenarios
Polycrystalline Fiber Board is used as a hot-face panel in laboratory and industrial high-temperature furnaces, as a setter board in ceramic sintering kilns, as a baffle and divider in heat-treatment furnaces, as a high-temperature gasket carrier plate and as the structural hot-face layer in custom-built furnace modules. It is also machined into fixtures and carriers for semiconductor and photovoltaic processing furnaces.
Factory & Service Advantages
Huaci's board line covers wet forming, drying, high-temperature treatment and CNC machining on the same site, with full-batch ERP traceability from fibre to finished board. Every production lot is tested for chemical composition, density, conductivity, shrinkage, compressive strength and dimensional accuracy, and three-level inspection covers surface finish, edge quality and machining tolerance. Standard boards ship from stock, custom sizes and machined parts are produced within 15 working days, and free samples are available for thermal-cycle evaluation.
FAQ
Q: Can the board be drilled and tapped like a metal plate?
A: Yes. Standard carbide metalworking tools are sufficient for drilling and tapping. Avoid standard high-speed-steel tooling above 5 mm depth.
Q: What is the maximum continuous service temperature?
A: 1500 C in oxidising atmosphere. The board is also stable in reducing and vacuum atmospheres.
Q: How is it different from castable refractory?
A: Polycrystalline board is a factory-formed panel with predictable properties, tight tolerance and immediate install. Castable needs on-site mixing, curing and drying, and dimensional accuracy depends on the installer.
Q: Can the board be made to a custom size?
A: Yes. Send us the drawing. We can cut, mill and machine to your dimensions, typically within 15 working days.
Q: Do you supply free samples?
A: Yes. 100 mm x 100 mm sample squares are provided free by courier for fitting and thermal-cycle testing.
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