
Product Description
High Purity White Quartz Silica Sand
1.
Description:
The
production of fused silica involves the electrofusing of high purity crytalline
silica
to form a
solid mass whose properties are enhanced as a result of the process. Fused
silica in comparison to crystalline silica is purer, and has a lower specific
gravity and linear coefficient of thermal expansion. Key characteristics of
fused silica include high temperature resistivity and low conductivity, making
it ideal for insulative applications, and precision casting mould application.
Also, the low thermal expansion and shock attributes of fused silica means that
its dimensions remain unchanged under extreme temperatures. Epoxy molded
compounds (with fused silica as a key constituent) are used as a base and
encapsulating material for electronic circuitry. This application makes use of
fused silica low electrical conductivity and insulative capacity, chemical
inertness and electrical transparency with respect to electromagnetic radiation.
2. Applications:
Due to its
unique characteristics, fused silica is used in a range of highly specialized
industrial applications. These can be broadly divided into three categories:
Refractory applications, molded applications, and precision casting
applications.
3. Typical Chemical Analysis:
Item |
Grade 1 |
Grade 2 |
Grade 3 |
Grade 4 |
SiO2 |
99.9%min |
99.8%min |
99.7%min |
99.5-99.6min |
Fe2O3 |
30ppm |
60ppm |
100ppm |
150-300ppm |
4. Physical Properties:
· Appearance: Transparent
Ingots, Granule or White Powder
· Specific Gravity: 2.21
· Hardness( Mohs): 7.0
· PH: 5-7
· Whiteness: 95Min.
5.
Split Sizes Available :
(1) 3
0.5
(2) -4+10mesh, -10+20mesh, -20+50mesh, -30+50mesh,-50+100mesh,