碳化硅粉 超細(xì)碳化硅 納米碳化硅
【碳化硅簡介】
天然碳化硅在自然界幾乎不存在，工業(yè)上應(yīng)用的碳化硅是一種人造材料。碳化硅俗稱金剛砂（SiC）或耐火砂、碳硅石，主要分為黑色碳化硅和綠色碳化硅，是用石英砂、石油焦（或煤焦）、木屑為原料（生產(chǎn)綠色碳化硅時需要加食鹽）通過電阻爐高溫冶煉而成，均為六方晶體。碳化硅耐高溫，與強(qiáng)酸、強(qiáng)堿均不起反應(yīng)，導(dǎo)電導(dǎo)熱性好，具有很強(qiáng)的抗輻射能力。一級碳化硅含量高，比如綠色碳化硅結(jié)晶塊，含量一般在98 99以上，也就是說的一級塊，二級塊的含量就要低些80 85 90等等，還有些含量更低的30，40直接叫三級塊。
用碳化硅粉直接升華法可制得大體積和大面積碳化硅單晶。用碳化硅單晶可生產(chǎn)綠色或藍(lán)色發(fā)光二極管、場效應(yīng)晶體管，雙極型晶體管。用碳化硅纖維可制成**吸波材料，在**工業(yè)中前景廣闊。碳化硅超精細(xì)微粉是生產(chǎn)碳化硅陶瓷的理想材料。碳化硅陶瓷具有優(yōu)良的常溫力學(xué)性能，如高的抗彎強(qiáng)度，優(yōu)良的抗氧化性，耐腐蝕性，非常高的抗磨損以及低的磨擦系數(shù)，而且高溫力學(xué)性能（強(qiáng)度、抗蠕變性等）是已知陶瓷材料中**的材料，如晶須補(bǔ)強(qiáng)可改善碳化硅的韌性和強(qiáng)度。
Sublimation b can be obtained directly with silicon carbide powder mass and large area heavily sb-doped silicon carbide. With heavily sb-doped silicon carbide to produce green or blue light-emitting diodes, field effect transistor, bipolar transistor. With silicon carbide fibers can be made into radar absorbing material and broad prospects in military industry. Silicon carbide superfinishing fine powder is an ideal material to production of silicon carbide ceramics. Silicon carbide ceramics with excellent mechanical properties at room temperature, such as high bending strength, excellent oxidation resistance, corrosion resistance, high wear resistance and low friction coefficient, and high temperature mechanical properties (strength, creep resistance, etc.) is the best material of ceramic material, known as whisker reinforcement can improve the toughness and strength of silicon carbide.
黑碳化硅的特點(diǎn)：大爐冶煉，冶煉時間長，結(jié)晶充分，結(jié)晶顆粒大，純度高，雜質(zhì)少；強(qiáng)度高，耐用性良好；經(jīng)過酸洗、水洗，清潔度好；經(jīng)過特殊處理的高純度產(chǎn)品，強(qiáng)度更高，磨削能力更強(qiáng)。
綠碳化硅適用于消磨銅、鋁、寶石、光學(xué)玻璃、陶瓷等硬合金、金屬及硬而脆的非金屬材料；微粉還可以用作陶瓷材料。
碳化硅（SiC）是用石英砂、石油焦(或煤焦)、木屑為原料通過電阻爐高溫冶煉而成。碳化硅在大自然也存在罕見的礦物莫桑石，又稱碳硅石。在當(dāng)代C、N、B等非氧化物高技術(shù)耐火原料中，碳化硅為應(yīng)用最廣泛、最經(jīng)濟(jì)的一種，可以稱為金鋼砂或耐火砂。
The characteristics of black silicon carbide: big furnace smelting, refining time is long, crystallization, crystal particles is large, high purity, less impurities; High strength, good durability; After pickling, washing, cleanliness; Through special processing of high product purity, strength, higher grinding ability is stronger.
Green silicon carbide is suitable for the killing of copper, aluminium, jewel, optical glass, ceramics and other hard alloy, bllic and hard and brittle non-bllic materials; Micro powder can also be used as a ceramic material.
Silicon carbide (SiC) is using quartz sand and petroleum coke or coal tar, wood chips as raw material through high temperature electric resistance furnace smelting. Silicon carbide in nature there is also a rare mineral mo SangShi, also called moissanite. In contemporary C, N, B the oxide refractory raw materials in the high technology, such as silicon carbide as the most widely used, one of the most economic, can be called corundum or refractory sand.
【黑碳化硅與綠碳化硅的應(yīng)用區(qū)別】
碳化硅有黑色碳化硅和綠色碳化硅兩個常用的基本品種，都屬SiC。
1、黑碳化硅含SiC約98.5％，其韌性高于綠碳化硅，大多用于加工抗張強(qiáng)度低的材料，如玻璃、陶瓷、石材、耐火材料、鑄鐵和有色金屬等。
2、綠碳化硅含SiC99％以上，自銳性好，大多用于加工硬質(zhì)合金、鈦合金和光學(xué)玻璃，也用于珩磨汽缸套和精磨高速鋼刀具。
3、還有立方碳化硅，它是以特殊工藝制取的黃綠色晶體，用以制作的磨具適于軸承的超精加工，可使表面粗糙度從Ra32～0.16微米一次加工到Ra0.04～0.02微米。
Green silicon carbide silicon carbide black silicon carbide and two common basic varieties, belong to SiC.
1, black silicon carbide containing SiC by about 98.5%, its toughness is higher than the green silicon carbide, mostly used for processing low tensile strength of material, such as glass, ceramics, stone, refractory material, cast iron and nonferrous bl, etc.
2, green silicon carbide containing SiC99 % above, good self-sharpening, mostly used for processing hard alloy, titanium alloy and optical glass, also used for honing cylinder jacket and fine grinding HSS cutting tools.
3, and cubic silicon carbide, it is a special process for making yellow crystals, to make the abrasive tool suitable for bearing the superfinishing, can make the surface roughness from a processing Ra32 ~ 0.16 microns to Ra0.04 ~ 0.02 microns.
【碳化硅用途】
明悅碳化硅由于化學(xué)性能穩(wěn)定、導(dǎo)熱系數(shù)高、熱膨脹系數(shù)小、耐磨性能好，主要有四大應(yīng)用領(lǐng)域，即功能陶瓷、**耐火材料、磨料及冶金原料。碳化硅粗料已能大量供應(yīng)，不能算高新技術(shù)產(chǎn)品，而技術(shù)含量極高的納米級碳化硅粉體的應(yīng)用短時間不可能形成規(guī)模經(jīng)濟(jì)。
1、作為磨料，可用來做磨具，如砂輪、油石、磨頭、砂瓦類等。
2、作為冶金脫氧劑和耐高溫材料。
3、高純度的單晶，可用于制造半導(dǎo)體、制造碳化硅纖維。
4、用于3—12英寸單晶硅、多晶硅、砷化鉀、石英晶體等線切割。太陽能光伏產(chǎn)業(yè)、半導(dǎo)體產(chǎn)業(yè)、壓電晶體產(chǎn)業(yè)工程性加工材料。
5、用于半導(dǎo)體、避雷針、電路元件、高溫應(yīng)用、紫外光偵檢器、結(jié)構(gòu)材料、天文、碟剎、離合器、柴油微粒濾清器、細(xì)絲高溫計、陶瓷薄膜、裁切工具、加熱元件、核燃料、珠寶、鋼、護(hù)具、觸媒擔(dān)體等領(lǐng)域。
Because MingYue silicon carbide chemical stable perbance, high thermal conductivity, thermal expansion coefficient, wear-resisting perbance is good, there are mainly four big application field, namely, functional ceramics, refractories, abrasives, bllurgical raw materials. Silicon carbide raw material supply can have a lot of, can't calculate high-tech products, and the application of high technology content of nano-sized sic powder short time can't b scale economy.
1, as abrasive, abrasive tool can be used to do, such as grinding wheel, whetstone, grinding head, sand tile, etc.
2, as bllurgical deoxidizer and high temperature resistant material.
3, single crystals of high purity, can be used in the manufacture of semiconductor, the manufacture of silicon carbide fibers.
4, for 3-12 inch monocrystalline silicon, polycrystalline silicon, potassium arsenide, quartz crystal wire cutting, etc. Solar photovoltaic industry, semiconductor industry, piezoelectric crystal industry physical processing materials.
5, used in semiconductor, the lightning rod, circuit components, the application of high temperature and ultraviolet detection apparatus, material structure, astronomy, disc brakes, clutch, diesel particle filter, filaments pyrometer, ceramic film, cutting tools, heating element, nub fuel, jewelry, steel, gear, catalyst supporter, and other fields.
【碳化硅特點(diǎn)】
