The functions and uses of black silicon carbide

lack silicon carbide is made from quartz sand, petroleum coke and high-quality silica as raw materials, and is smelted at high temperature in a resistance furnace. Its mechanical strength is higher than corundum, and it is brittle and sharp. So what are the functions and uses of black silicon carbide? The role of black silicon carbide: Black silicon carbide contains about 98.5% SiC, and its toughness is higher than green silicon carbide. It is mostly used to process materials with low tensile strength. Black silicon carbide has stable chemical properties, high thermal conductivity, small thermal expansion coefficient, and good wear resistance. The refractory material made of it is thermal shock resistant, small in size, light in weight, high in strength, and has good energy saving effect. Low-grade silicon carbide is an excellent deoxidizer. It can speed up steelmaking, facilitate control of chemical composition, and improve the quality of steel. Uses of black silicon carbide: Abrasive. Mainly used for making grinding wheels, sandpaper, oil stones, grinding heads, grinding pastes, and surface grinding and polishing of monocrystalline silicon, polycrystalline silicon and various devices in photovoltaic products, etc. Refractory materials. It can be used as metallurgical deoxidizer and high temperature resistant material to...

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Characteristics of 11 different abrasives

Abrasives can be divided into 11 categories such as brown corundum, white corundum, zirconium corundum, black corundum, sipcon carbide, boron carbide, etc. What are their different characteristics? Brown corundum is a brown artificial corundum smelted from bauxite in an electric arc furnace, hence the name brown corundum. Because of its high hardness (HV=1800~2200 kg/mm2), good toughness and high melting point (1800~2000℃), it can be used as grinding material. The main chemical component of brown corundum is ALO3, and its conventional content is 95.00%~96.00%. It is the most basic abrasive. Because of its good grinding performance, wide range of apppcations and low price, it is widely used. The appearance of brown corundum abrasive is brown sand grains. The coarser the grain size, the darker the color. The finer grains are pke powder. Product identification usually uses physical testing and chemical analysis. White corundum is a high-purity corundum crystal made from aluminum-oxygen powder as raw material and melted and recrystalpzed at high temperature in an electric arc furnace. The color is pure white, hence the name white corundum. The main component is AL2O3, with a content of more than 98.5%. It has good chemical stabipty, spghtly higher hardness than brown corundum (HV=2200~2300kg/mm2),...

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Why is Silicon Carbide Green?

  In the market, we can see silicon carbide in various colors. This is because different types of silicon carbide are available for applications in different fields. Especially when these silicon carbide crystals sparkle in the sunlight, they appear quite beautiful. In reality, pure silicon carbide is a colorless crystal. The color of industrial-grade silicon carbide depends on the types and quantities of impurities present in the crystal, ranging from light yellow to black. In the abrasives industry, shades from light blue to black are considered black silicon carbide, while colorless to green shades are referred to as green silicon carbide. However, there is another viewpoint that explains the black color of silicon carbide. It suggests that fine carbon particles are trapped within the crystal structure. Without the addition of salt, some of the silicon dioxide vapor escapes due to its rapid evaporation, while the carbon material does not have enough time to react. As a result, a small amount of silicon dioxide vapor is lost, and the carbon material remains as fine particles within the formed silicon carbide crystal. The appearance color of silicon carbide is not only related to the natural color of the crystal itself but also...

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What is the shelf life of microsilica powder?

Microsilica, also known as silica fume or condensed silica fume, is a highly reactive pozzolanic material that is widely used in the construction industry. It is a byproduct of the production of silicon metal and ferrosilicon alloys. When properly stored, microsilica can be used effectively in concrete and cementitious applications. However, like any other material, it has a limited shelf life. In this article, we will explore the factors that affect the shelf life of microsilica and provide recommendations for its storage and usage. Factors Affecting Shelf Life: Moisture: Microsilica is hygroscopic, meaning it has a tendency to absorb moisture from the surrounding environment. Excessive exposure to moisture can lead to the formation of agglomerates, affecting its flowability and reactivity. Therefore, it is crucial to store microsilica in a dry environment and protect it from direct contact with water. Temperature: High temperatures can cause microsilica to undergo chemical reactions, leading to reduced reactivity. It is advisable to store microsilica in a cool environment to prevent heat-induced degradation. Contamination: Microsilica is susceptible to contamination from foreign materials such as dirt, dust, and organic substances. Contaminants can alter its properties and negatively impact its performance. It is important to store microsilica in...

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Silicon Carbide Industry Exports, 2023

In 2023, the export volume of silicon carbide industry exhibited a significant growth trend, which was mainly attributed to the rising demand for high-performance semiconductor materials globally. Driven by new energy vehicles, renewable energy, and power electronics, silicon carbide, as a key material, has seen its demand in the international market climb year after year.

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Silicon Carbide Industry Usage in 2023

With the advancement of technology and environmental awareness, silicon carbide, a high-performance material, is showing significant growth in its usage in several fields. The following is a brief summary of the usage of silicon carbide industry in 2023.

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