Gypsum plasters - determination of water of crystallization content 建筑石膏结晶水含量的测定
It loses lots of crystalliferous water when the temperature is above 200 c 约200 c以上开始大量失去结晶水。
Second step , the nanometer tin dioxide powder aspects are gone except the water of crystallization system by the way of hydrothermal 第二步,利用水热脱水法去除凝胶中的结晶水制得纳米二氧化锡粉体。
Water of crystallization of barium chloride was determined more rapidly more simply and more accurately by the application of microwave - heating technigue 摘要在微波辐射下准确测定了氯化钡中结晶水的含量。
The precursor of freeze - drying is amorphous with residual water and ammonia , having a smooth surface . the morphology is flaky , club - shaped and a little hexagonal 冷冻干燥前驱体呈非晶态,有残留的结晶水和氨,表面光滑,形貌主要为片状和条柱状,有少量六边形态。
The machine is new equipment to use crystal water in material , directly put powder into granularity . the machine structure on new and rational stable with reliable , easy for maintain 利用物料中的结晶水,直接将粉料制成颗粒的新设备,结构合理,性能稳定可靠,清洗维修方便。
Good alkali resistance , dissolved only in hot strong acid , good thermal endurance ; it begins to decompose into red pigment when losses water of crystalliza - tion under temperature higher than 150 耐碱性、耐于热热的强酸,耐热度较高,温度超过150以上失去结晶水开始分解为红色颜料。
3 . by thermo - activation treating , the crystal water and constitution water of sepiolite were further changed . changes of channels between crystals and porosity made the specific surface area of the products increase from 295 . 39 m2 / g to 324 . 67m2 / g 3 .经过热活化处理使海泡石的结晶水和结构水进一步发生变化,晶间管道和孔隙度的改变使产物的比表面积由295 . 39m2 / g提高到324 . 67时/ g 。
The ralationship between the color of turquoise and its composition and structure is studied , that is , the variation from blue through green to brown yellow is dependent on the amount of iron . absorped water , crystalline water and hydroxyls lose from turquoise when it is heated , therefore its structure is destroied and its color also becomes green , yellow from azure 随着铁含量的增加,绿松石的颜色逐渐由蓝变绿、变黄;随温度逐渐升高,绿松石失去结晶水和结构水,结构被破坏,由原来的天蓝色逐渐变成绿色、黄色。
百科解释
结晶水(Water of crystallization)是以中性水分子形式参加到晶体结构中去的一定量的水;在晶格中占有一定的位置,水分子数量与矿物的其他成分之间常呈简单比例。