Lianyungang Dinglong CO.,LTD


Melting Furnace for Fused Silica	FUSED SILICA INGOT	FUSED SILICA GRAIN

Fused silica is manufactured from high purity natural silica stone, through high temperature fusion, cooling, smash and selecting. With high purity and electricity resistance, lowest thermal expansion and exceptionally good thermal shock resistance, our fused silica is mainly used in the fields of epoxy molding compound, investment casting, refractory, ceramic, shell mould, silicon rubber, electrical insulator, high quality glass products, etc.

Physical properties	Color	White opaque or transparent	Chemical Analysis	SiO 2 (%)	>99.9
				Fe2O3(ppm)	<25
				Li2O(ppm)	<1.0
	True specific gtavity	2.21g/.cm³		Al2O3(ppm)	<100
				K2O(ppm)	<20
				Na2O(ppm)	<20
	Softening poing	About 1650°C	Sizes:(unit mm)
			50-5	1-0.2
	Refactoriness	SK34(1750°C )	30-5	1-0.1
			10-3	1-0.4
	Hardness	7(New Mohs)	10-1	0.84-0.3
			5-1	0.6-0.2
	Coefficient of thermal expansion	0.5*10&10(0-1000°C)	0.21-5.6	0.5-0.212
			4-0.48	0.5-0.2
	Thermal conductivity	1.3w/m.k(20°C )	3-1	0.5-0.2
			3-0	04-0.212
	Dielectric constant	3.8(1MHz)	2-1	0.3-0.15
			2-1	0.3-0.15
	Young's modulus	778*10³Map(20°C)	2-0.5	0.2-0.1
			1.55-0.64	0.15-0.075
			1.0	-0.075
			1-0.5	-0.045