Silikon karbida, zat anorganik dengan rumus kimia SiC, terbuat dari pasir kuarsa, kokas minyak bumi (atau kokas batubara), serpihan kayu (garam ditambahkan untuk menghasilkan silikon karbida hijau), dan bahan mentah lainnya dilebur pada suhu tinggi dalam tungku tahan. Silikon karbida juga ada di alam sebagai mineral langka, moissanite. Among C, N, B dan bahan baku tahan api teknologi tinggi non-oksida lainnya, silicon carbide is the most widely used and economical one, which can be called gold steel sand or refractory sand. Industrial production of silicon carbide is divided into two kinds of black silicon carbide and green silicon carbide, kedua kristal heksagonal, berat jenis 3.20 ~ 3.25, microhardness of 2840 ~ 3320kg/mm2.

History of Silicon Carbide

Silicon carbide is by the American Acheson in 1891 when the electric fusion diamond experiments, in the laboratory accidentally found a carbide, then mistaken for a mixture of diamond, so named adamantine, 1893 Acheson research out of the industrial smelting silicon carbide method, which is often referred to as Acheson furnace, has been used to this day, to carbon material for the core body of the resistance furnace, electric heating quartz SiO2 and a mixture of carbon to produce silicon carbide.

Classification of Silicon Carbide

There are two common basic varieties of silicon carbide, silikon karbida hitam Dan silikon karbida hijau, both of which are alpha-SiC.

Silikon karbida hitam

Black silicon carbide contains about 95% Sic, its toughness is higher than green silicon carbide, and it is mostly used for processing materials with low tensile strength, seperti kaca, keramik, batu, bahan refraktori, cast iron and non-ferrous metals.

Hijau silikon karbida

Green silicon carbide contains about 97% SiC or more, mengasah diri dengan baik, mostly used for processing carbide, titanium alloy and optical glass, also used for honing cylinder liners and fine grinding high-speed steel tools. Selain itu, there is also cubic silicon carbide, which is a yellow-green crystal made by a special process, used to make abrasives suitable for bearing super-finish machining, can make the surface roughness from Ra32 ~ 0.16 microns to Ra0.04 ~ 0.02 microns at a time.

Silicon carbide material structure

Pure silicon carbide is a colorless and transparent crystal. Industrial silicon carbide is light yellow, green, blue or even black depending on the type and content of the impurities it contains, and its transparency varies with its purity. The crystal structure of silicon carbide is divided into α-SiC, which is hexagonal or rhombic, and β-SiC, which is cubic (called cubic silicon carbide). α-SiC is composed of many different variants due to the different stacking sequences of carbon and silicon atoms in its crystal structure, and more than 70 types have been found. β-SiC is transformed into α-SiC at 2100°C and above. Refining. The refined silicon carbide blocks are crushed, washed with acid and alkali, magnetically separated and sieved or water-selected to make products of various particle sizes.

Silicon Carbide Manufacturing Process

Due to its low natural content, silikon karbida is mostly man-made. The common method is to mix quartz sand with coke, using the silica and petroleum coke in it, adding salt and wood chips, placing it in an electric furnace, heating it to a high temperature of about 2000°C, and then obtaining silicon carbide powder after various chemical processes.

Aplikasi silikon karbida

Silicon carbide has four main application areas, namely: keramik fungsional, advanced refractories, abrasives Dan metallurgical raw materials.

Abrasive

It is mainly used for making grinding wheels, ampelas, sabuk abrasif, batu minyak, blok penggilingan, menggiling kepala, abrasive pastes and for grinding and polishing of monocrystalline silicon, polycrystalline silicon in photovoltaic products and piezoelectric crystals in the electronics industry, dll..

Fire-resistant materials

Using silicon carbide with corrosion resistance, ketahanan suhu tinggi, kekuatan tinggi, konduktivitas termal yang baik, resistensi dampak dan karakteristik lainnya, silicon carbide on the one hand can be used for a variety of smelting furnace lining, komponen kiln suhu tinggi, pelat silikon karbida, kapal, bagian pendukung, melorot, wadah silikon karbida, dll..
Di sisi lain, dapat digunakan untuk bahan pemanas tidak langsung suhu tinggi di industri peleburan logam non-ferrous, seperti tungku distilasi tangki vertikal, pelat menara tungku distilasi, tangki elektrolit aluminium, lapisan tungku peleburan tembaga, tungku bubuk seng dengan pelat busur, tabung pelindung termokopel, dll.; itu digunakan untuk membuat tahan aus, tahan korosi, tahan suhu tinggi dan bahan keramik silikon karbida canggih lainnya; itu juga bisa membuat nosel roket, bilah turbin gas, dll.. Selain itu, silikon karbida juga merupakan salah satu material yang ideal untuk jalan raya, aerospace runways, solar water heaters, dll..

Metallurgical beneficiation

The hardness of silicon carbide is second only to diamond, with strong wear resistance, is the ideal material for wear-resistant pipes, impellers, pump chambers, cyclones, hopper linings, and its wear resistance is 5-20 times that of cast iron. Its wear resistance is 5-20 times that of cast iron and rubber, and it is also one of the ideal materials for aviation runways.

Keramik fungsional

SiC ceramics not only have excellent room temperature mechanical properties, such as high flexural strength, excellent oxidation resistance, good corrosion resistance, high wear resistance and low coefficient of friction, but also high temperature mechanical properties (kekuatan, creep resistance, dll.) are widely used in various ceramic materials.

Produsen Silikon Karbida

Henan Superior Abrasives Impor & Ekspor Co., Ltd. (HSA), didirikan di 2001, adalah pemasok terkemuka silikon karbida dan produk terkait di Cina. Sebagai pemasok penting produk abrasif, HSA memelihara hubungan erat dan kerjasama strategis dengan banyak perusahaan multinasional terkenal. Pasar kami mencakup Amerika, Kanada, Timur Tengah, Rusia, Spanyol, Afrika Selatan, Asia Tenggara dan lain-lain.

If you have a need for silicon carbide, selamat datang untuk menghubungi kami!