【碳化硅简介】

      天然碳化硅在自然界几乎不存在，工业上应用的碳化硅是一种人造材料。碳化硅俗称金刚砂（SiC）或耐火砂、碳硅石，主要分为黑色碳化硅和绿色碳化硅，是用石英砂、石油焦（或煤焦）、木屑为原料（生产绿色碳化硅时需要加食盐）通过电阻炉高温冶炼而成，均为六方晶体。碳化硅耐高温，与强酸、强碱均不起反应，导电导热性好，具有很强的抗辐射能力。一级碳化硅含量高，比如绿色碳化硅结晶块，含量一般在98 99以上，也就是说的一级块，二级块的含量就要低些80 85 90等等，还有些含量更低的30，40直接叫三级块。

      用碳化硅粉直接升华法可制得大体积和大面积碳化硅单晶。用碳化硅单晶可生产绿色或蓝色发光二极管、场效应晶体管，双极型晶体管。用碳化硅纤维可制成雷达吸波材料，在军事工业中前景广阔。碳化硅超精细微粉是生产碳化硅陶瓷的理想材料。碳化硅陶瓷具有优良的常温力学性能，如高的抗弯强度，优良的抗氧化性，耐腐蚀性，非常高的抗磨损以及低的磨擦系数，而且高温力学性能（强度、抗蠕变性等）是已知陶瓷材料中最好的材料，如晶须补强可改善碳化硅的韧性和强度。

      黑碳化硅的特点：大炉冶炼，冶炼时间长，结晶充分，结晶颗粒大，纯度高，杂质少；强度高，耐用性良好；经过酸洗、水洗，清洁度好；经过特殊处理的高纯度产品，强度更高，磨削能力更强。

      绿碳化硅适用于消磨铜、铝、宝石、光学玻璃、陶瓷等硬合金、金属及硬而脆的非金属材料；微粉还可以用作陶瓷材料。

      碳化硅（SiC）是用石英砂、石油焦(或煤焦)、木屑为原料通过电阻炉高温冶炼而成。碳化硅在大自然也存在罕见的矿物莫桑石，又称碳硅石。在当代C、N、B等非氧化物高技术耐火原料中，碳化硅为应用最广泛、最经济的一种，可以称为金钢砂或耐火砂。

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, metallic and hard and brittle non-metallic 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.

【黑碳化硅与绿碳化硅的应用区别】

      碳化硅有黑色碳化硅和绿色碳化硅两个常用的基本品种，都属SiC。

      1、黑碳化硅含SiC约98.5％，其韧性高于绿碳化硅，大多用于加工抗张强度低的材料，如玻璃、陶瓷、石材、耐火材料、铸铁和有色金属等。

      2、绿碳化硅含SiC99％以上，自锐性好，大多用于加工硬质合金、钛合金和光学玻璃，也用于珩磨汽缸套和精磨高速钢刀具。

      3、还有立方碳化硅，它是以特殊工艺制取的黄绿色晶体，用以制作的磨具适于轴承的超精加工，可使表面粗糙度从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 metal, 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】

      明悦碳化硅由于化学性能稳定、导热系数高、热膨胀系数小、耐磨性能好，主要有四大应用领域，即功能陶瓷、高级耐火材料、磨料及冶金原料。碳化硅粗料已能大量供应，不能算高新技术产品，而技术含量极高的纳米级碳化硅粉体的应用短时间不可能形成规模经济。

      1、作为磨料，可用来做磨具，如砂轮、油石、磨头、砂瓦类等。

      2、作为冶金脱氧剂和耐高温材料。

      3、高纯度的单晶，可用于制造半导体、制造碳化硅纤维。

      4、用于3—12英寸单晶硅、多晶硅、砷化钾、石英晶体等线切割。太阳能光伏产业、半导体产业、压电晶体产业工程性加工材料。

      5、用于半导体、避雷针、电路元件、高温应用、紫外光侦检器、结构材料、天文、碟刹、离合器、柴油微粒滤清器、细丝高温计、陶瓷薄膜、裁切工具、加热元件、核燃料、珠宝、钢、护具、触媒担体等领域。

Because MingYue silicon carbide chemical stable performance, high thermal conductivity, thermal expansion coefficient, wear-resisting performance is good, there are mainly four big application field, namely, functional ceramics, refractories, abrasives, metallurgical 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 form scale economy.

1, as abrasive, abrasive tool can be used to do, such as grinding wheel, whetstone, grinding head, sand tile, etc.

2, as metallurgical 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, nuclear fuel, jewelry, steel, gear, catalyst supporter, and other fields.