摘要：采用煅烧硅藻土经精细分级和粒度级配,制备出用于苯丙乳液、纯丙乳液涂料体系的消光助剂,采用扫描电镜、X射线衍射、激光粒度分析、光泽度测定等方法对样品及涂层进行了表征及分析测试。结果表明:当煅烧硅藻土的粒度d₁₀、d₂₅、d₅₀、d₇₅、d₉₀分别为2.54、5.04、9.74、18.80、31.66μm,且粒度呈正态分布时,60、85°的光泽度接近,消光率分别可达51%、65%。

关键词：硅藻土；粒度分布；光散射

Abstract：The calcined diatomite matting agent was firstly prepared by classifying and fitting together by an appropriate proportion. This matting agent was applied in styrene-acrylic emulsion and acrylic emulsion. The production and coating were characterized by means of SEM， XRD， SL， Gloss Meter， etc. The results showed that when the corresponding particle size of power granularity d₁₀、d₂₅、d₅₀、d₇₅、d₉₀ were 2.54， 5.04， 9.74， 18.80， 31.66 μm， the particle size was normal distribution. When the angles of incidence were 60° and 85°， the glossiness of the coating was adjacent. The extinction efficiency reached 51% and 65%， respectively. 

Keywords：diatomite； granularity distributing；light scatting