Gypsum plasters - determination of water of crystallization content 建筑石膏結晶水含量的測定
It loses lots of crystalliferous water when the temperature is above 200 c 約200 c以上開始大量失去結晶水。
Second step , the nanometer tin dioxide powder aspects are gone except the water of crystallization system by the way of hydrothermal 第二步,利用水熱脫水法去除凝膠中的結晶水制得納米二氧化錫粉體。
Water of crystallization of barium chloride was determined more rapidly more simply and more accurately by the application of microwave - heating technigue 摘要在微波輻射下準確測定了氯化鋇中結晶水的含量。
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 冷凍干燥前驅體呈非晶態,有殘留的結晶水和氨,表面光滑,形貌主要為片狀和條柱狀,有少量六邊形態。
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 利用物料中的結晶水,直接將粉料制成顆粒的新設備,結構合理,性能穩定可靠,清洗維修方便。
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 耐堿性、耐于熱熱的強酸,耐熱度較高,溫度超過150以上失去結晶水開始分解為紅色顏料。
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 .經過熱活化處理使海泡石的結晶水和結構水進一步發生變化,晶間管道和孔隙度的改變使產物的比表面積由295 . 39m2 / g提高到324 . 67時/ 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 隨著鐵含量的增加,綠松石的顏色逐漸由藍變綠、變黃;隨溫度逐漸升高,綠松石失去結晶水和結構水,結構被破壞,由原來的天藍色逐漸變成綠色、黃色。
百科解釋
結晶水(Water of crystallization)是以中性水分子形式參加到晶體結構中去的一定量的水;在晶格中占有一定的位置,水分子數量與礦物的其他成分之間常呈簡單比例。