High-quality graphite felt for semiconductor crystal and vacuum furnaces

Graphite felt

Graphite felt is divided into pitch-based graphite felt, polyacrylonitrile-based (PAN-based) graphite felt, and viscose-based graphite felt due to the different selection of original felts. The main purpose is to be used as heat preservation and heat insulation materials for monocrystalline silicon smelting furnaces. In the chemical industry, it can be used as a filter material for high-purity corrosive chemical reagents.

Carbon felt is graphite felt after being treated at a high temperature of over 2000℃ under vacuum or inert atmosphere. The carbon content is higher than that of carbon felt, reaching more than 99%. At the end of the 1960s, graphite felt was already available in the world. Graphite felt is divided into pitch-based, polyacrylonitrile-based graphite felt and viscose-based graphite felt due to the different selection of the original felt.

Among them, the asphalt represented by Kureha Chemical of Japan is the mainstream in the insulation industry, the European and American insulation felts are basically made of adhesives, while the majority of China uses polyacrylonitrile as raw materials. Process: Cut the polyacrylonitrile-based carbon felt or viscose-based carbon felt into the required size, roll it into a tube and put it into a container made of graphite material, and place the graphite container in a high-temperature furnace (the high-temperature furnace is a graphite tube furnace, an intermediate frequency , High-frequency induction furnace or other high-temperature furnaces with heating methods), protected by vacuum or high-purity inert gas, heated to 2200-2500°C at a heating rate of 100-300°C/h, and then naturally cooled to 100°C. 

Packaging &Shipping：

Packaging: export standard wooden case.
Delivery Detail: 15~30 working days after confirming order.
Sea Port: Shanghai or other port of China Mainland.

FAQ：

Q1. Are you a factory or trading company?
A: We are an ISO9001-Qualified processing manufacturer with 70000 square meter factory area.
Q2. Can you introduce your main products?
A: Sure.
Jiangxi Ningheda New Material Co., Ltd. mainly produces graphite products, we can offer customized shape according to customers' specific demand. Our Graphite Products, including molded graphite products, isostatic graphite products, extruded graphite products, vibration moulding graphite products. We can produce a lot of graphite products, like graphite mold, graphite casting die, graphite heating element, graphite crucible, graphite sealing ring, graphite tube, graphite rod, graphite edm, graphite block etc.
Q3.What is your MOQ?
A: 1 piece (graphite block, graphite rod, graphite box, graphite mold, graphite material, graphite seal ring, graphite crucible, graphite products, graphite sintering mold, graphite heater etc.).
Q4. Can you offer free samples?
A: Yes, usually we can offer free sample for you to check the quality, but do not afford express charge.
However, if the sample is expensive, like large size, we has to charge basic cost of the sample. And Samples delivery time will be about 3-10 days.
Q5. When can I get the price?
A: We will reply you within 24 hours after getting your detailed requirements, like size, quantity etc. If it is an urgent order, you can call us directly.
Q6. Do you accept OEM or ODM orders?
A: Yes, of course, most of our products are customized.
Q7. How about your delivery time?
A: Usually 7 to 25 days after payment.
Q8. Do you test your goods before delivery?
A: Yes, we have strict inspection system.
Q9. How do you keep long-term business relationship?
A: 1. Good quality and competitive price to ensure mutual benefit;
2. Quick reply and sincere service.
Notice: When you contact us, please show us the accurate drawing and your selected graphite material information, then we can offer you accurate price.