ISO 1619-1976 天然和人造冰晶石 试验样品的制备和贮存

标准号：ISO 1619-1976
中文标准名称：天然和人造冰晶石 试验样品的制备和贮存
英文标准名称：Cryolite, natural and artificial; Preparation and storage of test samples
标准类型：D80;D50
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：D80;D50
国际标准分类号：73.060.40
适用范围：Specifies the procedure for the preparation of crude samples and dried samples and of natural and synthetic materials having a molar ratio sodium fluoride/aluminium trifluoride between 3 and 1,7 approximately. The crude sample is intended for the determination of geometric characteristics, for certain physical and physico-chemical tests and for moisture determination. The dried sample serves especially for chemical tests. The principle of the procedure consists in grinding followed by sieving of the sample until the whole passes through a sieve of mesh aperture 0,125 mm. Thorough mixing and drying at approximately 110 鳦.