锆 英 粉Zircon flour 锆英粉是由天然矿砂—锆英砂粉碎而成。主要成分为ZrSiO4（硅酸锆）。理论上ZrO2为67.1%，SiO2为32.9%。现在市场上销售的产品以ZrO2含量计算纯度。 天然一级锆英粉中ZrO2含量为65%左右，比重4.6-4.7g/cm3，莫氏硬度7-8。硅酸锆化学性质非常稳定，熔点2550℃。因此在摩擦材料中应用可以取得非常理想的效果。主要特点是：1. 提高摩擦系数。2. 由于其抗热震动特性，不产生震动噪音。3. 应用为增磨剂时磨损较小Zircon flour is made of matural ore-zirconium sand grinding.the main compostion is ZiSiO.ZrO is 67.1% and SiO is 32.9%.Now on the market by ZrO2 content product purity of calculation.Natural level zircon powder content for 65% of ZrO2,proportion of 4.6-4.7g/cm3,7-8’s hardness.ZrSiO chomistry is very stable,melting point 2550℃.therefore in the friction materials can be obtained in the application of the ideal effect.Key features are:1.Increase friction coefficient.2.due to its thermal vibration characteristics,no vibration noise.3. When applied to increase grinding wear small.主要技术指标：Its main technical indices:

检 测 项 目Testing Items	单 位Units	标准数值Standard values	数值范围Numerical range
比重Density松散密度Porosity震实密度Tap density筛分分析Screening analysis粒子尺寸Particle size 0.045 mm粒子尺寸Particle size 0.045 mm粒子尺寸Particle size105 ℃挥发份Volatile 105℃800 ℃灼烧损失residue on ignition , 800℃化学成分Chemical analysis硅酸锆ZrSiO4总的化学分析General chemical analysis.ZrO2SiO2	g/cm3mi/100gml/100g%% μm%%%%%	4.6-4.760370100250.050.19865．2132	57-6434-40 0.1 991.0-45 0.1 0.3