Basic Info.(Specification)

Description

We're fused silica sand and powder manufacturer: Best Severice and Quality!!!

Product Description

Fused Silica sand & powder Specifications:

1. Physical Properties
Composition : SiO2
Structure : Amorphous
Colour : Transparent or white
Melting Temperature : approx.1750ºC
Specific Gravity : 2.21g/cm3
Hardness : 7 Mohs
Thermal Expansion : 0.5*10-6

2. Chemical Properties
SiO2 : >99.9%
Al2O3 : <100ppm
Fe2O3 : <30ppm for grain
CaO : <30ppm
Na2O : <30ppm
K2O : <30ppm

The finer the powder, the higher the Al2O3, as powder is produced by ball mill with Alumina ball.

3. Particle Size Distribution

Mesh	Microns	Standard
		10-20	30-50	50-100	-120	-200	-325
+8	2360	<2
+12	1700	6-25
+16	1180	33-50
+20	850	25-45	<1
+30	600	13	25-40
+40	425		32-45
+50	300		15-30	<13
+70	212			30-60
+80	180		0-11			<1
+100	150			28-51	<10	<1
+140	106			4-16	7-13	<10
+200	75			<2	10-15	<10	<3
+325	45				14-20	15-30	4-11
Pan		<3	<2	<1	45-55	70-80	86-97

*Pan designates the percentage of fused silica passing the last reported screen for each size.

Fused Silica Production Process

We strictly choosed the high purity silica sand (SiO2>99%) in local Donghai/Xinyi as our raw material. The melted silica sand becomes amorphous silicon dioxide glassy ingot after being fused at high temperature (2000-2300 ºC), and cooling. We further process the products into fused silica lump, sand and powder according to customer's requirements.

Fused Silica Special Feature

Fused Silica features extremely low coefficient of thermal expansion, consistent chemistry and carefully controlled particle size distribution.

Fused Silica Applications

Fused Silica are used in industry of thermal ceramic, refractory, investment casting, EMC, solar crucible, quartz marble, powder coating etc.

Available Sizes

0-1mm, 1-3mm, 3-5mm, 0.2-0.5mm, 0.1-0.5mm
-10mesh, 10-20mesh, 30-50mesh, 50-100mesh, -100mesh, -150mesh, -270mesh
30-60mesh, 60-120mesh, 40-70mesh, 70-140mesh, 100-200mesh
120F, 200mesh, 325mesh, 400mesh, 600mesh, 800mesh, 1250mesh etc.

The particle size can be produced as customer's special requirement.

Fused Silica Sand Appearance and Specifications

1) It is forbidden to contain any unfused parts.

2) It is forbidden to have foreign material such as string, plastic line, carbon or wooden material, metal or other outside contaminants.

3) All color dots are forbidden except conditional black dots.

4) It is not acceptable that black spot diameter is larger than 2mm.

5) Total black dots quantity should be less than 10 when opening the big bag equal or less than 10 dots per square meters.