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Fused Silica Flour and Sands offer a high quality ceramic shell and final cast item

Fused Silica Flour and Sands offer a high quality ceramic shell and final cast item

Product No.：2021112174516
Price(USD)：USD550/MT
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Fused silica is an amorphous siliceous glass produced by high temperature fusion of high quality crystalline silica(quartz). This fusion produces a substance characterised by very low thermal expansion and a high resistance to temperature and thermal shock.

Fused silica is employed in a variety of industrial applications including foundry (investment casting slurry and stucco, and mould release agent), refractory and ceramic (crucibles, saggars, rollers, pouring cups,ceramic cores, gas fire radiants and items for steel, non-ferrous metal and glass industries), and filler (electronic and adhesives).

Chemsize realised early on that the secret of manufacturing investment powder lay in the quality of the raw materials available.

The company has carried out an extensive global sourcing project and has located what it considers to be some of the highest quality refractories so far made available to investment foundries. These include Fused Silica produced from quartz of exceptional purity with an SiO2 content of 99.9%. The source also has particularly low iron, potassium and sodium oxides and such a low trace element content to fall well within Aerospace specifications.

Fused Silica-Investment Casting Grade

1．	Physical Properties
1.1	Composition		SiO2
1.2	Structure		Amorphous
1.3	Colour		Transparent or white
1.4	Melting Temperature		approx.1750℃
1.5	Specific Gravity		2.21g/cm3
1.6	Hardness		7 Mohs
1.7	Thermal Expansion		0.5*10-6
2．	Chemical Properties
		Investment Casting Grade
2.1	SiO2	>99.90%
2.2	Al2O3	<200ppm
	The finer the power,the higher the Al2O3,as powder is produced by ball mill with Alumina ball.
2.3	Fe2O3	<50ppm
2.4	TiO2	<20ppm
2.5	MgO	<40ppm
2.6	CaO	<40ppm
2.7	AlkaliesNa2O+K2O	<100ppm
3.	Particle Size	Distribution

		10/20mesh	20/50mesh	30/50mesh	50/100mesh	-100mesh	-200mesh	-325mesh
Mesh	Microns
8	2360	<2
12	1700	6-25
16	1180	33-50
20	850	25-45	<1	<1
30	600	13	25-40	15-30
40	425		32-45	38-50
50	300		15-30	20-35	<13
70	212				30-60
80	180		0-11	<10			<1
100	150				28-51	<15	<1
140	106				4-16	17-40	<10
200	75				<2	19-34	<10	<3
325	45					14-30	15-30	4-11
Pan		<3	<2	<2	<1	4-20	70-80	86-97