摩擦材料原材料及介绍.doc

摩擦材料用原材料 from 徐仁泉编译 20020710 1无水氧化铝 Aluminum Oxide (Anhydrous)Specific gravity 3.1 and more. Moh hardness 9. Look at the hardness. This is abrasive! Stable at high temperatures. If particle size is too big expect drum scoring. Fine powders (10 microns) will polish the drum or disc. Crystalline in structure it is similar to the mineral corundum. Aluminum oxide, like most abrasives nowadays, is manufactured rather than natural. Because of this improved control can be exercised over chemical composition and crystalline structure. Crystalline alumina has a conchoidal fracture, and the grains when crushed, or broken, possess sharp points and edges.（无水的氧化铝）比重大于 3.1 莫氏硬度 9 磨料，高的温度稳定性，如果微粒大划伤刹车鼓。

10 微米的细粉将抛光鼓轮或圆盘结晶体在结构方面它与矿物刚玉相似如同大多数磨料一样，现今，铝氧化物人造的好于天然的因为这改进了化学的组成和结晶的结构的控制当压碎时，结晶的矾土有一个蚌线的断口和颗粒，或断开的，拥有锐利的点和边氢氧化铝 Aluminum Oxide (Hydrated) Aluminum Oxide Specific gravity 2.4 Moh hardness 3. More a filler than an abrasive. Tends to fade, but has good wear resistance. Will polish the opposing surface.氢氧化铝比重 2.4 莫氏硬度 3 .比磨料加得更多的填充物有衰退趋势，但耐磨性好将抛光对偶铝粉96% pure aluminum in a granular form. Especially suited to low/medium duty applications.Blend of properties for good refinement and wear reduction of the material and rotor surface especially in lining/rail applications.在一种粒状的形式方面的纯的铝 96%。

特别适用于中低负荷，混合料有好的特性和降低摩擦材料的磨损和对偶表面摩擦副的磨损硅酸铝 Aluminum Silicate Kyanite (Cyanite), an aluminum silicate, AlSiO often used in the calcined form will elevate friction levels. Kaolin or China Clay, AlSiO 2HO, are among the orthosilicates used in friction materials蓝晶石（蓝晶石） 、一个铝硅酸盐经常用于煅烧形式硅酸铝将升高摩擦水平高岭土或中国陶土，AlSiO 2HO，是其中正硅酸盐，用于摩擦材料煅烧氧化铝 Fused Alumina (Alundum)alumina and is harder and more abrasive. (Typically 97% alpha alumina, 3% beta) It is less amorphous, has sharper fracture lines which impart more abrasive characteristics. Large particles will score the opposing surface. Quantities in excess of 1% (wt.) in a friction formula will wear the opposing surface and, in turn, the brake lining.纯净矾土更多做磨料材料的熔化的矾土（刚铝玉）供给者。

它是更少地非晶的（典型的 97%α氧化铝、3%β 氧化铝）它的很少的无定型相，有给与更更锋利的断口线更具有磨料的特征大颗粒将划伤刹车鼓在摩擦材料配方中超过 1%（重量）将磨损刹车片和对偶硫化锑 Antimony TrisulphideAntimony Trisulphide An orange pigment used in red vulcanized rubber. Not stable. Becomes black and crystalline (stibnite) when heated to 200250C. Considered a lubricant at higher 摩擦材料用原材料 from 徐仁泉编译 20020710 2temperatures (450C). Popular in Europe, but not encouraged in the United States because of its toxic nature. Better if you can manage without it! Used in pyrotechnology and the manufature of matches!硫化锑用于橘红色颜料用于硫化橡胶。

不稳定的当对 200-250C 被加热时变为黑的和结晶的（辉锑矿） 通常在欧洲作为更高的温度（450C）的润滑剂在美国因为它的毒性格不鼓励使用最好你能不用它用于火工产品和火柴的制造重晶石 BarytesSpecific gravity 4.4, Moh hardness 3.0 - 3.5. A popular low cost filler, although its high specific gravity means a lot of barytes is required to fill a little space. Increases density some customers still think a heavier block is superior to a light weight block! Relatively inert high heat stability.Improves wear, lowers friction level a little.Many of the best formulas on the market are heavily loaded with barytes.Yet some manufacturers have difficulty making products with more than 5%. The secret is in the process.Barytes is normally a fine powder (2%<200 mesh, 98%<325 mesh) and large quantities produce a dense product impervious to the diffusion of gases during baking. Those manufacturers using copious amounts of barytes rarely open bake above 345F otherwise blistering would occur.To bake at higher temperatures requires the extra expense of confined baking on baking forms。

Beware, barytes can be contaminated with metal oxides like silicon and iron oxides.The more silica in the barytes the higher the friction level of the finished product. Barytes with silica content at. say, 10% is not necessarily bad. Just recognize it is there and it is affecting friction level. Make sure your supplier sells a consistent product. In some places what is sold as barytes is, in fact, a mixture of barium and strontium sulphates.This does no have to be bad either.Just don't switch back and forth from one 'barytes' to another. PHYSICAL PROPERTIES OF BARYTES Highest Density of any Extender Contributes to particle packing density 1. Improves holdout 2. Noise absorption 3. Contributes to improved adhesion 4. Extremely Low Solubility Chemically inert 1. Not affected by acids or alkalis 2. Insoluble in water 3. Low reactivity with binders (extremely low MgO and CaO content) 4. Low Oil Absorption Low resin demand/reduction in needed binder Low Moh's Hardness 重晶石： 比重 4.4、莫氏硬度 3.0 - 3.5。

流行的低的成本填充物，虽然它的高比重意味着很多重晶石去填充增加密度！一些顾客仍认为重的块胜过轻的块相对地惰性的高的热稳定性改善磨损，轻度降低摩擦许多市场上最好的重负荷配方用重晶石可是一些制造者5%或更多困难秘密是在制造过程里如果重晶石正常地是一个好的粉,（2% < 200 目筛、98% < 325 个筛） ，当热处理时大量产产生的气体的扩散不能透过的产品。