General chemical raw materials


also known as silicon carbide, carborundum. Silicon carbide is made of raw materials, such as quartz sand, petroleum coke, wood cutting ... etc.

Silicon carbide can be divided into two series:
1. Green silicon carbide
2. Black silicon carbide

※What are the difference between green silicon carbide and black silicon carbide?
The silicon content of green silicon carbide is higher than black silicon carbide, and both the physical property and chemical property of green silicon carbide are better than black silicon carbide, next is that the impurities of green silicon carbide is less than black silicon carbide and its usage is slightly broader than black silicon carbide. In the process of raw material smelting, green silicon carbide is smelted from petroleum coke, while black silicon carbide is smelted by using petroleum coke or anthracite. Therefore, performance was slightly lower than the green, the price is also lower than the green.

Silicon carbide applications
  • Sapphire wafer cutting.
  • Ceramic grinding, sand blasting.
  • Grinding non-metallic materials.
  • Can be made into sandpaper, emery cloth, grinding wheel, grinding stone.

Product Specifications
Chemical composition

1. Grain size sand


Particle size range SiC Free carbon Fe2O3
20#-90# 98.50 0.15 0.2
100#-180# 98.00 0.20 0.3
220#-240# 97.00 0.30 0.3-0.6
240#-280# 97.00 0.30 0.8

2. Refractory materials mixed sand
Grade SiC Free carbon Fe2O3
98 98 0.2 0.3
97 97 0.3 0.5
90 90 2.0 2.0
85 85 4.0 3.0

※All the specifications listed above are common specifications, both the actual specifications and particle size can be adjusted according to customer needs.


Aluminum oxide: also known as bauxite, corundum. Aluminum content in the crust of the Earth is ranked at third; in the nature it often exists in the form of oxides; its common purity is 99.5% and 96%.

Aluminum oxide powder applications

  • Used in various kinds of blasting and grinding operations.
  • Materialization and aesthetic feeling processing of poly or acrylic arts.
  • Blasting in the TV screen manufacturing process.
  • Additives to refractory materials or other ceramics.
  • Growing sapphire crystal, polishing…etc.

Aluminum oxide powder specification

White Aluminum oxide

Chemical formula: Al2O3
Shape: polygonal
Mohs hardness: 9
Density: 3.95-3.97

General grinding composition (%)

Al2O3 Na2O SiO2 Fe2O3 CaO+MgO
99.6% 0.18% 0.01% 0.02% 0.02%

Particle size(μm) 3.0±2 4±2 6±2 12±2 30±2 35±2
  45±2 60±2 75±2 90±2 105±2 125±2
  150±2 180±2 250±2 300±2 350±2 500±2
  600±2 710±2 1180±2 1700±2 2000±2  

High purity aluminum oxide composition(ppm)

Al2O3(%) Fe Ca Si Cu Pb Mg Ni
99.99 <4 <9 <10 <3.5 <5 <10 <


High purity aluminum oxide composition(ppm)

Al2O3(%) Si Fe Cu Na
99.999 <2 <0.5 <1 <0.5
  Ca Mg Zn Ti
  <0.1 <0.5 <1 <0.5

※All the specifications listed above are common specifications, the actual specifications, particle size and purity all can be adjusted according to customer needs.


Application description of high-purity aluminum oxide products

  1. High temperature resistance, good thermal conductivity, high hardness, good infrared penetration chemical stability.
  2. Widely used in industrial, defense and scientific research fields (for example: high-temperature infrared window ... etc.)
  3. Widely used monocrystalline basic material, currently is the preferred substrate (first need to outreach GaN thin film on sapphire substrate) of blue, purple, white light-emitting diode (LED) and blue laser (LD) industries, is also an important superconducting thin film substrate.
  4. Sapphire is a very important basic material for superconducting thin film. It can be used to produce Y-, La-high temperature superconducting thin films...etc., and also can be used to grow new type practicalMgB2 (magnesium diboride)superconducting thin film.

High purity aluminum oxide specifications

→Aluminum oxide powder
→Aluminum oxide ingot


Purity 5N
Density(g/㎝3) 3.6
Impurities content Si<(ppm) 2.5
Fe<(ppm) 1.0
Cu<(ppm) 1.0
Na<(ppm) 1.0
Ca<(ppm) 1.0
Mg<(ppm) 1.0
Ti<(ppm) 0.5
Pb<(ppm) 1.0