日韩专区欧美在线,日韩高清视频在线,欧美超碰在线观看,亚洲欧美日韩视频在线视频,日本在线亚洲专区,成人在线电影亚洲,久久香蕉国产免费天天,国产三级成人久久,亚洲欧洲免费黄片,欧美日韩专区一区二区三区,久久爽av亚洲精品天堂系列图片,亚洲精品99久久久久不卡,国产午夜精品电影,成人免费黄色影院,国产日韩高清一区二区三区,日本不卡不二三区在线看,国产成人一区二区三区高清,国产精品久久久久一级精品,精品一区二区三区影片,日韩欧美狠狠综合久久,国产精品系列视频在线观看,亚洲视频一区二区三区四区五区六区七区,久久国产天天看黄片

Character characteristics

White powder or colorless crystal. Odorless. Tasteless. 825 ℃ is decomposed into calcium oxide and carbon dioxide. Dissolve in dilute acid to release carbon dioxide, insoluble in alcohol. There are two kinds of crystals, one is orthorhombic crystal aragonite, the other is hexagonal rhombic crystal calcite. Calcite, irritant.

A particles with regular shape can be regarded as monodisperse powder, but they can be in many shapes, such as spindle, cube, needle, chain, sphere, sheet and quadrangular column. These different shapes of calcium carbonate can be prepared by controlling reaction conditions.

B particle size distribution is narrow.

C particle size is small, the average particle size is generally 1-3 μ M. To determine the average particle size of light calcium carbonate, the short axis particle size in the triaxial particle size can be used as the performance particle size, and then the median particle size can be used as the average particle size. In addition to the description later, the average particle size refers to the average short axis particle size.