查询词典 tridymite

The microstructure of crystallized cristobalite,tridymite andmelanophlogite have been studied and the effect of crystallization on sintering of compositealso has been discussed.

对所析出的方石英、鳞石英和硫方石英的显微结构进行了讨论，同时亦讨论了石英玻璃的析晶对复合材料烧结的影响。

A white or colorless vitreous insoluble solid; various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechartelierite.

一种白色或无色的玻璃质不溶固体，以各种形式广泛存在于地壳中，如石英、方石英、鳞石英等。

Glassy phase, tridymite (SiO2) and CaO are also found in the coating.

硅灰石晶体中还存在层错缺陷。

On the gas face,there are tridymite,silicate,C3P,glass phase and also a few precipitated carbon.

燃烧面由鳞石英、硅酸盐、磷酸三钙、玻璃相和无定形碳组成，但沉积碳较少。

The ash from open-field burning or from non-controlled combustion in industrial furnaces usually contains a higher proportion of non-reactive silica minerals such as cristobalite and tridymite.

由开阔场地燃烧或在工业炉中不加控制地燃烧得到的灰通常含有较高比例的非反应性二氧化硅矿物质。

The ash from open-field burning or from non-controlled combustion in industrial furnaces usually contains a higher proportion of non-reactive silica minerals such as cristobalite and tridymite, and it should be ground to very fine particles to develop pozzolanic activity.

由开阔场地燃烧或在工业炉中不加控制地燃烧得到的灰通常含有较高比例的非反应性二氧化硅矿物质，例如方石英和鳞石英，而且，要发展火山灰活性，它应该被研磨成很细的颗粒。

It has high SiO2,low flux (AL2O3+2R2O),low Fe2O3,high refractoriness under load, low true density,low residual quartz,high tridymite and cristobalite.

该产 品具有SiO2含量高，熔融指数（AL2O3+2R2O）低、Fe2O3含量少，荷重软化点高、真密度小、低含量残余石英、方、磷石英含量高等特性。

SiO〓 crystal transformation was improved by adding Na〓SO〓, alpha cristobalite but not tridymite was catalytic active support. C〓 selectivity was improved by adding W and P, and suppressed deep oxidation property of SiO〓. W-O in catalyst surface was not active species. The support combined with S, W, P show low activity and high C〓 selectivity.

Na〓SO〓的加入促进了SiO〓晶型的转化，α-方石英是催化活性载体成分，而鳞石英没有甲烷氧化偶联反应活性。W和P的加入改善了C〓烃的选择性，抑制了SiO〓的深度氧化特性；W-O物种不是催化活性物种；由S、W、P及SiO〓组成的载体反应活性较差，但选择性较好；同时S元素对C〓烃的选择性的贡献有限。

Adding fused MnO2-CaF2 Mineralizer into fine silicon powder can change its cryst al structure and improve the amount of tridymite,thus can improve the kiln furni ture's high temperature properties and prolong its lifetime.

MnO2-CaF2混合矿化剂能改善硅微粉析晶结构，增加磷石英的含量，从而改善窑具的高温性能，延长使用寿命；采用XRD法测定析晶结构，并测定窑具的抗折强度、抗折强度保持率、气孔率、吸水率等各项性能指标，综合分析得出MnO2-CaF2混合矿化剂的最佳加入量为2%。

On the coke face,the metacristobalite and Quartz transformed into tridymite completely.The C3P,pseudowollastonite and glassy were formed by absorbtion of MgO,Al2O3,P2O5,and CaO contained in coke.

炭化面亚稳方石英和残存石英几乎全部鳞石英化，吸收焦炭中的MgO、Al2O3、P2O5和CaO，生成磷酸三钙（C3P）、假硅灰石和玻璃相。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。