Silicon carbide (SiC) alloy powder is a high-performance artificial abrasive and metallurgical additive with excellent properties such as high hardness, high temperature resistance, and good chemical stability. Aon Metals offers silicon carbide powders in various purity grades (88%, 90%, 97%, 98%) and sizes to meet the needs of different industrial applications.

Key Characteristics and Advantages

High Purity Options: Multiple purity grades from 88% to 98% to meet diverse application needs

Uniform Size: Precise size control ensures consistent performance

High Temperature Stability: Withstands temperatures above 1600°C

High Hardness: Mohs hardness 9.2-9.5, second only to diamond

Chemical Inertness: Resistant to acid and alkali corrosion, excellent chemical stability

Excellent Thermal Conductivity: High thermal conductivity, suitable for high-temperature applications

Cost-Effectiveness: More economical compared to other carbon source materials

silicon carbide

chemical composition

Specifications	88%silicon carbide	90%silicon carbide	97%silicon carbide	98%silicon carbide
SiC Content	≥88%	≥90%	≥97%	≥98%
Free Carbon	≤5.0%	≤4.0%	≤0.5%	≤0.3%
Fe₂O₃	≤1.2%	≤1.0%	≤0.5%	≤0.2%
Free Silicon	≤1.0%	≤0.8%	≤0.3%	≤0.1%
Moisture	≤0.5%	≤0.5%	≤0.3%	≤0.2%
Typical Size	0-1mm, 1-3mm, 3-5mm	0-1mm, 1-3mm, 3-5mm	0-1mm, 1-3mm	0-1mm, 0.5-1mm

Main uses

Silicon carbide of different purity has different performances and different application scenarios:

Silicon Carbide 88/90: Industrial wear-resistant and refractory fields

Refractory materials:

88# and 90# silicon carbide are the core raw materials of refractory materials due to their high cost-effectiveness. Adding them to refractory bricks, castables, and plastics can improve the high temperature resistance (long-term use temperature of more than 1600℃), wear resistance, and thermal shock resistance of the materials. They are widely used in the lining of steel blast furnaces, non-ferrous metal smelting furnaces, and glass kilns. For example, adding 20-30% of 88# silicon carbide to the refractory castable of the blast furnace tapping channel can extend the service life by 3-5 times.

Casting and abrasive auxiliary:

In the foundry industry, 88# SiC can be used as an inoculant to improve the structure of cast iron, or as an anti-sand additive to the molding sand to improve the surface quality of the casting. In the field of general abrasives, it can be used for rust removal on metal surfaces and the production of grinding wheels or sandpaper for stone cutting (scenarios where precision is not required).

Wastewater treatment:

88# silicon carbide granules can be used as filter media. Taking advantage of their high hardness and corrosion resistance, they can replace traditional quartz sand in industrial wastewater filtration systems to improve filtration efficiency and service life.

Silicon Carbide 97/98: Precision manufacturing and high-end industrial fields

Precision abrasives and polishing:

97# and 98# high-purity silicon carbide are the first choice for precision abrasives due to their low impurities and good crystal integrity. They can be processed into grinding wheels, grinding discs, grinding pastes, etc., and are used for precision grinding and polishing of materials such as cemented carbide, glass, ceramics, sapphire, etc., such as polishing of mobile phone screen glass, back thinning of semiconductor wafers, and other high-precision scenarios.

Semiconductor and electronics industry:

98# silicon carbide can be used to manufacture high-temperature, high-frequency, and high-power semiconductor devices (such as SiC MOSFET and IGBT) due to its excellent semiconductor properties (large bandgap and high breakdown electric field). It is widely used in new energy vehicle inverters, 5G base station power supplies, aerospace electronic equipment and other fields. In addition, high-purity silicon carbide can also be used as a substrate material for epitaxial growth to support the development of third-generation semiconductor technology.

Photovoltaic and new energy:

In the photovoltaic industry, 97# silicon carbide can be used as a cutting blade material for crystalline silicon slices, and its high hardness can be used to achieve efficient cutting; in the field of new energy, high-purity silicon carbide coatings can improve the conductivity and stability of lithium-ion battery electrodes and extend the battery cycle life.

Functional ceramics:

Structural ceramics made of 98# silicon carbide have high strength, high toughness and excellent thermal conductivity. They can be used to manufacture high-end components such as high-temperature bearings, mechanical seals, and gas turbine blades, and can operate reliably in extreme environments such as aerospace and nuclear power.

Silicon Carbide 88 90 97 98