Rigid Felt Cylinder

Rigid Felt Cylinder

Vulcan's composite rigid felts are made from high quality foreign polyacrylonitrile based raw materials, which are screened into carbon felts using a small amount of binder to form the required product shape and then cured and graphitised at 2400°C. The hard felts are structured using the density gradient method and are treated with various surface processes or purified to ensure the best thermal insulation properties and better oxidation resistance. The rigid felts are structured using the density gradient method and treated with various surface processes or purification treatments to ensure the best thermal insulation performance and better oxidation resistance at high temperatures, helping customers to reduce energy consumption and costs.

dvantages:

Good integrity of large flat and profiled elements

High mechanical strength

Good electrical conductivity and thermal insulation

High electrical load capacity

Outstanding thermal stability

High purity and low impurity content

Excellent resistance to vibration and corrosion

Easy to operate and simpler to maintain

Applications:

Flat plate: mainly used for high temperature vacuum sintering furnace and inert gas protection furnace, such as single crystal silicon, polysilicon crystal growth furnace, quartz furnace, vacuum furnace, induction furnace, high frequency furnace and heat balance reaction furnace, heat treatment furnace, hard alloy production, sintering furnace, welding furnace, high pressure furnace and other high temperature furnace body insulation material.

Cylinder: widely used as insulation material for high temperature crystal growth furnaces for monocrystalline silicon, polycrystalline silicon, compound semiconductors, optical fibres, etc.

Performance Indicators

Physical Characteristics		Unit	Standard Products	High Purity products	Ultra Pure Products
Carbon Fiber			PAN 基碳纤维	PAN 基碳纤维	PAN 基碳纤维
Density		g/cm^3	0.15-0.17	0.15-0.16	0.15-0.16
Carbon Content		wt	99.9	99.99	99.999
Heat-Treatment Temperature		℃	2000-2400	2400	2400
Average Thermal Conductivity 25℃		W/（m·K）	0.076	0.076	0.076
Average Thermal Conductivity 1000℃		W/（m·K）	0.25	0.23	0.23
Thermal Expansion Factor 1500℃		10-6/℃	3.4	3.2	3
Ash Content		ppm	<200	<20	<5
Compressive Strength	Face Direction（5%）	Mpa	0.236	0.225	0.225
Compressive Strength	Two-sided Direction	Mpa	1.79	1.77	1.55
Bending Strength	Face Direction（5%）	Mpa	0.395	0.39	0.36
Bending Strength	Two-sided Direction	Mpa	1.33	1.20	1.15
Resistivity	Face Direction（5%）	Ω.m	6.64*10-3	5.51*10-3	5.28*10-3
Resistivity	Two-sided Direction	Ω.m	7.22*10-4	6.73*10-4	6.73*10-4
Usage Environment	Air	℃
	Vacuum		2400	2400	2400
	Inert Gas		3200	3200	3200