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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The blank reference experiment shows that hydrothermal crystallization treatment favors the formation of hexagonal tungsten trioxide, and the tungsten trioxide powder sample prepared by this method has a high degree of crystallinity.
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Thickening of the lamellae as a result of the crystallization treatment enabled by the cool-heat method lead to an increase in the peak melting temperature and the final traces of melting.
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With prolonged crystallization treatment a second non-conducting crystalline phase, anorthite, reduces the conductivity of the glass-ceramics.
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After the crystallization treatment at 620°C of the nucleated glass, an enhanced a-axis preferred orientation of the lead titanate cubic perovskite, which is not ferroelectric, was developed in the surface-layer region.
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Each film was exposed to 100hrs in air at 800C after the initial crystallization treatment.
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| | In this paper, some of the experimentaal techniques and methods arereported on benzene chlorination producing p-dichlorobenzene in the labora-tory. Some of those are chlorine flow measurement and tube seal, pre-treatment of the sampl? and dealing of p-dichlorbenzene crystalization,ect。 | | 本文报道了苯氯化制对二氯苯小试实验中氯气管道的密封、流量的计量,对二氯苯结晶处理及氯化液分析等实验技术。 | | 文摘来源 | | Crystallization and melting behaviors of ploy(p-phenylene sulfide)(PPS)/nylon6(N6)blends arestudied by differential scanning calorimetry(DSC).Morphologies of PPS and its blends are examinedby scanning electron microscopy(SEM).It is found the presence of N6 can promote PPS nucleation inblends during crystallization.The isothermal crystallization curves of PPS and its blends both exhibitdouble peaks because of the different end group structure of PPS.The isothermally crystallized samplesalso exhibit correspon... | | 本文用差示扫描量热法(DSC)研究了聚苯硫醚(PPS)与尼龙6(N6)共混物的结晶与熔融行为,并用扫描电镜(SEM)观察了 PPS 及其共混物的结晶形态。结果表明,共混物中 N6组分的存在对PPS 晶核的形成有促进作用;PPS 及其共混物在等温结晶过程呈现双峰特征是与 PPS 分子链的端基结构密切相关。经等温结晶处理的试样,在熔融时相应的 PPS 也呈现双峰,其低温峰随结晶温度的提高而向高温方向移动。PPS 及其共混物膜在一定条件下结晶后,可形成典型的树枝晶形态。 | | 文摘来源 | | Studies the effect of the chemical compositions and the heat treatments technology on the microstructure and property of the workable glass ceramics of SiO_2-B_2O_3-Al_2O_3-MgO-K_2O-F. The results show, the melting temperature decreases as the content of MgO and Al_2O_3 decrease; Al_2O_3 can strongly restrain devitrification; F has a less intlunce on the melting process, but only acts on nucleation preparation. The nucleation rate and the volume percent of the crystals pracipitated on the glass matrix incre... | | 研究了化学成分、热处理工艺等因素对SiO_2-B_2O_3-Al_2O_3-MgO-K_2O-F系可加工玻璃陶瓷的组织和性能的影响。改变化学成分可影响玻化及结晶过程。结果表明,降低MgO、Al_2O_3的含量,可降低玻化温度;Al_2O_3强烈抑制失透;F对玻化过程的影响不大,但在晶化过程中起形核剂的作用。在结晶处理过程中,随着核化温度的升高,核化时同的延长,晶体的形核率增高,晶体的体积百分数增大。晶体的体积百分数越高,纵横比越大,玻璃陶瓷的可加工性越好。 | | 文摘来源 | |   | | << 更多相关文摘 |
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