石膏晶体

电镜照片表明，只有铝存在时，石膏晶体的外形几乎没有变化；

The shape of gypsum crystal changes little in the presence of Al3 + ion .

这些有机杂质可削弱二水石膏晶体间的接合，使硬化体强度降低；

Organic matter weakens the combination of dihydrate gypsum crystals and makes the strength reduce .

利用扫描电镜（SEM）、X射线光电子能谱（XPS）等测试手段分析了柠檬酸对二水石膏晶体结晶习性的影响，并从晶体生长的角度揭示了柠檬酸的缓凝机理。

By use of scanning electron microscopy ( SEM ) and X-ray photoelectron spectroscopy ( XPS ), effect of critic acid on crystalline habit of dihydrate was analyzed , and retarding mechanism of critic acid was also discussed from the standpoint of crystal growth .

柠檬酸对二水石膏晶体生长习性与晶体形貌的影响

Effect of critic acid on crystalline habit and crystal morphology of dihydrate

石膏晶体中硫同位素分馏的研究

Isotopic fractionation of sulfur in gypsum crystals

转晶剂、晶种和分散剂对α半水石膏晶体粒度、形貌的影响

Influence of Medium Crystal Agent , Seed Crystal Dispersing Agent on Crystal Granularity Morphology of Alpha-hemihydrate Gypsum

由于脱硫工艺的影响，循环流化床粉煤灰中可以见到脱硫产物，主要为石膏晶体。

Influenced by desulfurized technology , gypsum could be detected in the fly ash from circulating fluidized bed .

温度越高，纯水泥砂浆的硫酸盐侵蚀破坏越快，砂浆中生成了更多的钙矾石与石膏晶体；

A higher temperature leaded to a quicker sulfate attack on the pure cement mortar , and more ettringite and gypsum crystals form in the attacked mortar .

结果表明：可溶磷主要分布在二水石膏晶体表面，其含量随磷石膏粒度增加而增加。

Experimental results show that water_soluble P 2O 5 is distributed on the surface of dihydrate gypsum crystals . Its content increases with increase of size of phosphogypsum .

推断罗布泊巨量钙芒硝形成是一个连续过程：第一阶段，早期古湖水经蒸发作用析出石膏晶体。

The huge amounts of glauberite deposition in the Lop Nur is a continuous process . The first stage : gypsum crystals precipitated by evaporation in the early ancient lake .

结论复合转晶剂适当的比例和掺量、蒸压时间是控制α半水石膏晶体粒度、形貌及强度的关键因素。

The important factors of controlling the crystal granularity , morphology and strength of the alpha hemihydrate gypsum are the proportion of composition medium crystal agent and quantity , autoclave time .

缓凝剂改变了二水石膏晶体生长习性，使晶体由针状转变为短柱状，晶体尺寸明显增加；

The retarders have changed the growth habit of the dihydrate gypsum crystal , and changed the crystal from needle-shaped in-to short columnar , as well as notably increased its dimensions .

结果表明：三聚磷酸钠显著改变了二水石膏晶体的生长习性，使其由针状变为短柱状或板状，且晶体尺度增加；

The results indicate that STPP changes the crystal growth habit of gypsum dihydrate , leading to large crystal size and transformation of the crystal shape from needle-like to short prismatic or plank-shaped .

柠檬酸使早期液相离子浓度和过饱和度降低，使二水石膏晶体尺度增大，并改变二水石膏晶体生长习性，使晶形由针状转变为短柱状；

Addition of citric acid decreases ion concentration in liquid phase and supersaturation degree and changes the crystalline habit of dehydrate , lead to large crystal size and transformation of crystal shape from need-like to short prismatic .

从石膏晶体结构、植物纤维结构及石膏基植物纤维板的显微结构与材料特性出发，探讨了石膏基植物纤维板的吸水原理，以及相应的防水措施。

With the analysis of the structure of gypsum crystal , the structure of vegetal fiber , the microstructure of vegetal fiber board based on gypsum and its material characteristic , the theory of sobbing water of vegetal fiber board based on gypsum and relevant measure of waterproof are approached .

在反应溶液中加入转晶剂，使α-半水石膏的晶体形貌由针状变为短柱状，是液相法制备高强α-半水石膏的核心技术。

Adding crystal modifier to the reaction solution to change crystal morphology of α - hemihydrate gypsum from needle into short column was core technology in preparation of high-strength α - hemihydrate gypsum in liquid method .

运用MD方法对聚羧酸类阻垢分散剂与方解石、硬石膏、羟基磷灰石晶体的相互作用进行了动态模拟。

The interactions between carboxylate polymers and three kinds of scale crystals were simulated dynamically by employing molecular dynamics method .

分析复合外加剂的作用机理，并用扫描电镜对复合外加剂对石膏硬化体晶体形貌的影响进行了分析和研究。

Analysis of the mechanism of the composite admixture , and the influence of compound admixtures on gypsum crystal morphology using scanning electron microscopy analysis and research .

它直接导致水泥石中CSH凝胶体的分解，生成无任何胶结性的硅灰石膏（thaumasite）晶体，使混凝土最终变为一种白色的烂泥状混合物。

This form of attack directly leads to the decomposition of CSH gel and formation of the non-binder thaumasite crystal in the cement paste . As a result , the attacked concrete becomes a white mushy and friable mixture .

石膏复合防水剂对石膏晶体形成的影响

Effect of the Gypsum Waterproof Agent on Gypsum Crystal Formation

石膏基复合胶凝材料硬化体结构为二水石膏、钙矾石晶体和硬硅钙石交叉共生，C-S-H凝胶包围在其周围及接触点，未反应完全的矿渣颗粒填充孔隙。

The structure of hardening gypsum-based cementing composite body is Calcium sulfate dehydrate , Ettringite and Xonotlite crosswise symbiotic crystallization , C-S-H ( gel ) around them with unreacted slag particles fill the pore .

加入柠檬酸后，建筑石膏的缓凝、石膏硬化体强度的下降均与二水石膏晶体生长习性的改变息息相关。

After the addition of critic acid , the retarding effect produced and the strength reduction of hardened gypsum paste are closely related to the variation of crystallization habit and crystal structure of hydration products .

研究发现，缓凝剂能延长石膏结晶的诱导期，增加硬化体内部细晶粒含量，减小晶核生长率，并使石膏晶体形貌从针状变为小块状。

It has been found that retarder can prolong the induction period of gypsum crystallization , increase percentage of fine crystals in hardened gypsum paste , decrease the growth rate of crystal nucleus and change the appearance of gypsum crystal from needle-like to block-liker .

柠檬酸对二水石膏[111]面钙离子的选择性吸附，抑制了二水石膏在C轴上的生长，改变了二水石膏的晶体形貌，使其由针状转化为短柱状；

At the same time , because of preferred adsorption of citric acid on [ 111 ] face , the growth of C axis is strongly inhibited , consequently leading to the transformation of dihydrate crystal from needle-like to short prismatic .

通过实时测试掺和不掺缓凝剂的石膏浆体的浊度，确定不同条件下石膏结晶的诱导期，并通过SEM照片，探讨了缓凝剂对石膏晶体形貌的影响。

The turbidity of fresh paste with or without retarder was measured by live test to determine the induction period of gypsum crystal formation under different conditions , and the effect of retarder on gypsum crystal appearance by SEM photo was discussed .

从石膏砌块在高层建筑内隔墙中的应用和对建筑物理力学性能的影响出发，运用材料科学理论对石膏砌块的晶体结构形成、动力学的特点进行研究。

From the application of gypsum block as inner partition material in high-rise buildings and its influence toward the physical and mechanical performance of buildings , the article researches on the formation of crystal structure of gypsum block and dynamic properties with the theory of material science .