How is silicon boride SIB6 produced?

Overview of silicon boride SiB6 powder

Silicon boride (silicon hexaboride) is a shiny black-gray powder with a relative density of 3.0g/cm3 and a melting point of 2200°C. Silicon boride is a lightweight ceramic compound formed between silicon and boron. It is insoluble in water, resistant to oxidation, thermal shock and chemical attack, and has high strength and stability especially under thermal shock. The grinding efficiency is higher than that of boron carbide.

The SiB6 crystal structure includes interconnected icosahedrons (polyhedrons with 20 faces), icosahedral hexahedrons (polyhedrons with 26 faces), and isolated silicon and boron atoms. Compared with hexaboride, it is metastable. However, since crystal nucleation and growth are relatively easy, they can be prepared.

When heated in air or oxygen, the surface of SiB6 is oxidized and corroded by boiling sulfuric acid and fluorine, chlorine and bromine at high temperatures. Silicon boride is conductive. The coefficient of thermal expansion of hexaborides is low, and the nuclear cross section of thermal neutrons is large. 

Features of silicon boride SiB6 powder

1. Nano borosilicate has high purity, small particle size distribution and large specific surface area.

2. The melting point is as high as 2230°C. It is insoluble in water and has anti-oxidant effects, and has high resistance to chemical attack. Especially in terms of high thermal shock and stability;

3. The grinding efficiency of silicon boride is higher than that of boron carbide. It can be used as abrasives, grinding and engineering ceramics, such as nozzles, gas turbine blades and other different sintering conditions and sealing lines. 

How is silicon boride SiB6 produced? A method for preparing silicon boride powder is as follows

A ceramic ball mill is used to uniformly mix silicon powder with an average particle size of less than 1 micron and boron powder with an average particle size of less than 20 microns. The weight ratio of silicon powder and boron powder is 2.85-2.95:7.

After being put into the crucible, put it in a gas protection furnace, pass in argon gas, and heat to 1400-160°C for 50-70 minutes;

At the beginning of the heat preservation, put ASiCl4 into the furnace, 3-5 ml per minute, dripping time 9-11 minutes;

After cooling, the final SIB6 powder product obtained by pulverizing with a ceramic pot ball mill.

Application of silicon boride SIB6 powder

1. Used as various standard abrasives and grinding cemented carbides;

2. Used as engineering ceramic material, used as various standard abrasives, and grind cemented carbide.

3. It can also be used as engineering ceramic materials, sandblasting nozzles, manufacturing blades of gas engines and other special-shaped sintered parts and seals.

4. Used as an antioxidant for refractory materials. Silicon boride SiB6 powder.

The price of silicon boride SIB6 powder

The price of silicon boride SIB6 powder varies randomly with production costs, transportation costs, international conditions, exchange rates, and the market supply and demand of silicon boride SIB6 powder. Tanki New Materials Co.,Ltd aims to help all industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for silicon boride SIB6 powder, please feel free to contact us for the latest price.

Supplier of silicon boride SIB6 powder

As a global supplier of nano silicon powder, Tanki New Materials Co.,Ltd has extensive experience in advanced, engineered material properties, applications, and cost-effective manufacturing. The company has successfully developed a series of powder materials (including boron carbide), aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.