使结晶

Diopside crystals in fluosilicate glass-ceramics tend to lower thermal expansion coefficient, while richterite crystals in fluosilicate glass-ceramics tend to increase thermal expansion coefficient.The lowest thermal edpansion coefficient of K2O-MgO-SiO2-CaF2 fluosilicate glass-ceramics is 78.4×10-7(20-300℃), while the highest thermal expansion coefficient of this glass-ceramics is 85.6×

透辉石结晶相的含量增加使微晶玻璃的热膨胀系数降低，与此相反碱镁闪石结晶相的含量增加却使微晶玻璃的膨胀系数增加。K2O－MgO－SiO2－CaF2系统氟硅酸盐微晶玻璃的最小热膨胀系数为：78.4×10－7（20～300℃）；最大热膨胀系数为：85.6×10-7（20～300℃）。

On the NiO/SiO〓 catalyst prepared by IM, the main hydrogenation product of MA was SA, the activity and selectivity were almost no relation with the nickel content and nickel species 3. Summarizing the characterization and activity evaluation of the catalysts, we concluded: On nickel based catalyst, when NiO was crystallite, and the Ni〓 that was prepared by reducing, hydrogenation of the MA could lead to SA but not to γ-BL; when NiO was cluster and had a properly interaction with the support, the Ni〓 prepared by reducing, could hydrogenate MA to SA then to γ-BL. When NiO cluster and crystallite were both existed on the catalyst, the hydrogenation products were mixture of SA and γ-BL, and the amounts of SA and γ-BL were related with the ratio of cluster and crystallite.

综合催化剂的表征和活性评价得出：当镍基催化剂上氧化镍以结晶态存在，经氢还原后的零价镍可使顺丁烯二酸酐加氢得到丁二酸酐，丁二酸酐难以进一步加氢为γ-丁内酯；当镍基催化剂上氧化镍以簇团形式存在，与载体之间有适当的相互作用时，经氢还原后的零价镍可使顺丁烯二酸酐加氢得到的丁二酸酐进一步加氢为γ-丁内酯；若催化剂上氧化镍既有结晶态又有簇团形式时，随二者含量比例不同而得到丁二酸酐和γ-丁内酯的混合物。

The results proclaimed that nucleator C caused the thinner spherulites of POM and a greater growth rate, which was a three dimensional heterogenous growth process, and the crystal system of POM was not changed, but the crys-tallinity of POM decreased, the crystallite size of POM increased.

实验果表明，成核剂C的加入，使POM球晶细化，结晶速度加快，结晶过程为异相成核三维生长过程，且不改变POM的结晶晶型但结晶度略有下降，微晶尺pp成核剂寸增大。

Caprolactam grafted carbon fibre could improve the initial crystallization temperature and the crystallization rate more obviously than ungrafted carbon fibre. The crystallization of nylon 6 was determined by nucleation. The nonisothermal crystallization dynamics was well coincident with the rule of both of Jeziorny and Liu equation. isothermal crystallization dynamics fitted to Avrami equation.

用广角X射线衍射法对晶型结构进行研究，表明碳纤维使原生态的样品中α晶型的含量降低，结晶度下降，其中接枝聚己内酰胺链段的碳纤维／MC尼龙6原位复合材料中α晶型的含量比未接枝的碳纤维／Me尼龙6原位复合材料的多，结晶度也较大：样品淬火时，碳纤维有利于基体尼龙6结晶时形成γ型晶体，接枝聚己内酰胺链段的碳纤维更有利于基体尼龙6结晶时形成γ型晶体；淬火后的样品在200℃下退火2个小时后γ晶型完全转变为α晶型。

The experimental results show that:(1) the primary salt forming regions of K2SO4, Leonite, Langbenite and MgSO4H2O were observably different from those in Equilibria Phase Diagram.

实验结果表明：(1)该体系K2SO4，Leonite，langbenite和MgSO4H2O等盐能够形成初级晶核的初级成盐区与溶解平衡相区存在明显偏离，其中K2SO4成盐区域缩小，而Leonite和MgSO4H2O结晶区域均有不同程度的增大；(2)在蒸发结晶过程中，成盐晶种的存在使该盐的成盐区比初级成盐区有所扩展；(3)由于成盐区的扩展，使成盐区域出现不同程度的交错。

Experimental result makes clear:(K2SO4 of 1) this system, leonite, what the salt such as Langbenite and MgSO4.H2O can form primary nucleus is primary the area that become salt and area of deliquescent balance photograph are put in apparent deviate, among them K2SO4 narrows into saline area, and the accretion that Leonite and MgSO4.H2O crystallization area all have different rate;(2) is evaporating in crystallization process, the existence that plants into saline brilliant makes the area becoming salt of this salt is compared primary the area that become salt expands somewhat because;(3) becomes saline division patulous, salify area appears the crisscross of different level.

实验结果表明：(1)该体系K2SO4，Leonite，langbenite和MgSO4.H2O等盐能够形成初级晶核的初级成盐区和溶解平衡相区存在明显偏离，其中K2SO4成盐区域缩小，而Leonite和MgSO4.H2O结晶区域均有不同程度的增大；(2)在蒸发结晶过程中，成盐晶种的存在使该盐的成盐区比初级成盐区有所扩展；(3)由于成盐区的扩展，使成盐区域出现不同程度的交错。

The experimental results indicated that T_c~0,T_c~p,T_c~f and T_c~were increased,specially T_c~p increased by 15-20℃;and that the spherocrystal size,crystallization peak width,△T_c~L,D and△T_c~2were decreased.

实验表明，添加DMDBS使PP的T_c~o、T_c~P、T_c~f和T_c~均增大，尤其使T_c~P提高15-20℃，球晶尺寸显著缩小近10倍，而△T_c~L、D和△T_c~2减小且结晶峰宽变窄，表明结晶速率增大且晶粒分布均一细化。

The densities of recrystallization textures were higher in samples, which were recovered at low temperature and then heated by laser, than that of unrecovered.

加热速度能改变再结晶有效激活能从而改变再结晶进程，使依赖于再结晶机制的再结晶织构的形成亦受到影响。

A water model for simulation of 1050 mm mold is established to investigate the effects of SEN structure, casting speed, immersion depth and other parameters on the fluctuation of the liquid level in the mold, the impact depth of the steel stream and entrapping of the flux, and compare the influence of different structure parameters and operating parameters on the flowing field in the mold in order to find out the best suitable compromise between the structure parameters and the operating parameters and then...

针对 10 5 0mm× 15 0mm断面的结晶器，建立了水模型，研究浸入式水口结构、拉速、浸入深度等工艺操作参数对结晶器液面波动、流股冲击深度及结晶器钢液面保护渣卷入情况的影响，比较不同水口结构参数及操做参数对结晶器内流场的影响，从而找出结构参数与工艺参数间配合最佳的工况，为水口设计提供理论依据，并经优化的水口在实际中应用，使安钢第二炼钢厂的板坯退废率由 1.5 0 %降为0 。6 %。

This has an important meaning to the industrial manufacture.DSC, WAXD and polarizing microscope with hot stage experiments were performed to describe what led the SSP rate acceleration of PET/MMT. It was shown that montmorillonite acted as a very good nucleating agent in PET crystallization process, which results in the lower crystallinity, more small microlites, and more surfaces of microlites.

为研究PET／MMT固相缩聚效率提高的原因，通过热台偏光显微镜、DSC、X-射线衍射等手段对样品的结晶进行观察与分析研究，结果表明蒙脱土对PET的结晶有明显的成核作用，使其晶核生成速率迅速提高，晶核数量明显增多，从而使整个结晶过程的时间变短，同时形成了更多结构不完善的微晶体。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。