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The thermal expansion coefficient of fluosilicate glass-ceramics is mainly affected by the crystal phases and their amount.

氟硅酸盐微晶玻璃的热膨胀性能主要取决于微晶玻璃的晶相组成及其相对含量。

According to the 2-liquid immiscibility hypothesis and the study of devitrificationof system ZnO - Al_2O_3 - SiO_2, the authors have successfully made glass- ceramic s bymeans of addition of B_2O_3 and obtained a glass- ceramic composition № 6307 of prac-tical value.

作者利用二液分相的原理,在研究了ZnO-Al_2O_3-SiO_2系统玻璃析晶条件的基础上,用添加B_2O_3的方法成功地制得了微晶玻璃,获得了一个具有实用价值的№6307微晶玻璃组成。

According to the 2-liquid immiscibility hypothesis and the study of devitrificationof system ZnO - Al_2O_3 - SiO_2, the authors have successfully made glass-ceramics bymeans of addition of B_2O_3 and obtained a glass-ceramic composition № 6307 of prac-tical value.

作者利用二液分相的原理,在研究了ZnO-Al_2O_3-SiO_2系统玻璃析晶条件的基础上,用添加B_2O_3的方法成功地制得了微晶玻璃,获得了一个具有实用价值的№6307微晶玻璃组成。

Glass ceramics with α cordierite(2MgO·2Al 2O 3·5SiO 2) as main crystal phase, having excellent dielectric property, are perfect materials for microwave parts of a medium apparatus However, the thermal expansion coefficient of the material is not high enough for some special applications Now, a novel glass ceramics with suitable thermal expansion coefficient (47 7×10 -7 / C) and excellent dielectric property (ε=5 1,tgδ0 -3 ) was developed Crystallization process and the th...

本文以堇青石微晶玻璃为研究对象,首次研制得到了一种低介(ε= 51)、低损耗(tgδ<10- 3)、热膨胀系数(46 ~48 ×10- 7' C)能与其它器件相匹配的新型微晶玻璃介质材料通过 X射线衍射分析,扫描电镜观察等测试手段,研究了该材料的晶化过程和热膨胀系数的变化规律发现样品的热膨胀系数随温度的变化行为是与样品中析出的晶相种类及析出量随温度的变化规律相对应的

The method takes microcrystalline cellulose as affinity column chromatographic medium of Beta-glucosaccharase; under low temperature and anacid condition, the sample of Beta-glucosaccharase is loaded and specifically adsorbed to the microcrystalline column, and then the concentration of NaCl is increased to elute the enzyme, so as to achieve high-efficient and economic separation and purification.

本方法以微晶纤维素作为β-葡萄糖苷酶的亲和柱层析介质,在低温和微酸性条件下,将β-葡萄糖苷酶上样并特异性吸附于微晶纤维素柱,然后再通过增加NaCl浓度的方法将该酶洗脱,从而达到其高效而经济分离纯化的目的。

It was concluded that P2O5 was an effective nucleating agent for this glass system. The nucleation density of this glass system was too low to form tiny crystal after heat-treatment, when it contained no P2O5, and the major crystal phase was lithium silicate. Adding P2O5 resulted in major tiny crystal phase of lithium disilicate after heat-treatment.

结果发现P2O5是该玻璃体系的有效成核剂,未添加P2O5的玻璃体系成核密度低,热处理后不能形成微晶体,且主晶相为硅酸锂;添加P2O5使玻璃在热处理后形成以二硅酸锂为主晶相的微晶玻璃。

The formation of the composite microspheres is explained by the nucleation of silver on the surface of the latices followed by growth of the silver shell.

复合微球的形成机理可解释为:Ag纳米微晶首先在共聚物表面形成晶核,随后Ag纳米粒子在晶核表面生长并形成不同厚度的Ag壳层。

Studies show that the average ratio of w/w(P2O5)(1.62) of phosphates in submarine guyots is the same as that of w/w(P2O5)(1.621)of carbonate-fluorapatite, but is obviously different from that of w/w(P2O5)(1.318)of fluorine_carbonate, suggesting that the phosphates from northwestern Pacific are species of carbonate_fluorapatite.Three types of microneedle-microcolumnar, microgranular and microcryptocrystalline carbonate_fluorapatite with different abundances have been found.

海山磷酸盐的平均化学成分w/w(P2O5)(1.62)与碳氟磷灰石的w/w(P2O5)(1.621)几乎一致,而与氟磷灰石的w/w(P2O5)(1.318)相差甚远,表明海山磷酸盐为碳氟磷灰石,其形态主要有针状_柱状微晶碳氟磷灰石、粒状微晶碳氟磷灰石及显微隐晶质碳氟磷灰石3种类型,它们在分布丰度上存在差异。

Oerlikon Solar's proprietary micromorph? process significantly boosts solar cell efficiency by adding a second microcrystalline absorber to the amorphous silicon layer.

欧瑞康太阳能独有的微晶硅叠层工艺通过在非晶硅层上增加第二个微晶硅的吸收层,使得太阳能电池的转换效率显著提高。

Compared with ordinary quartz, owing to nanoscale alumina crystallite, the artificial stone made of TISM nanoscale microcrystallite quartz can stand higher temperature (as high as 800℃ instantly), become harder (reaching 6 according to mohs hardness scale), and enjoy better plasticity because of nano alumina crystallite's good mouldability.

帝斯曼TISM纳米微晶石英石同普通石英石相比,由於增添了纳米氧化铝微晶粒子,整体板材更耐高温(暂态耐温度可达到800摄氏度以上),硬度更大(莫氏硬度达到6以上),同时结合纳米氧化铝微晶粒子在抗拉伸疲劳中出现可塑性形变的特点,所以整体板材相对于普通石英石韧性更好、可塑性更高,更不易开裂。

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推荐网络例句

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。