方石英

The traditional ceramic semifinished materials are the aluminum silicate system, the production phase are mainly the mullite, the solid phase reaction temperature are quite high, generally in 1200℃ about; But after joining the wollastonite, turns the calcium silicate system, the high temperature resultant for the anorthite and the cristobalite, reduced the solid phase reaction temperature largely, approximately for 1000℃~1050℃, and the anorthite assumes acicular.

传统的陶瓷坯料为硅酸铝系统，生成的物相主要为莫来石，固相反应温度比较高，一般在1200℃左右；而加入硅灰石后变成硅酸钙系统，高温生成物为钙长石和方石英，大幅降低了固相反应温度，大约为1000℃～1050℃，且钙长石呈针状。

In addition, the latest research results on the amorphization of cristobalite were also introduced.

最后， 结合作者的工作，进一步介绍了方石英无定形化方面的最新研究成果。

Along with the economic growth and progress of science and technology, a good developing tendency is presented in chemical engineering and casting, thus, the cristobalite silica powder will have larger market potential in the future social progress.

随着经济的增长和科技的进步，化工和精密铸造呈现了良好的发展势头，因此方石英硅微粉在今后的社会发展中有着较大的市场潜力。

The whiteness of cristobalite is up to above 95%, when using in coating and paint, a part of titanium dioxide can be substituted to lower the production cost.

方石英的白度达95%以上，在涂料、油漆中使用，可取代部分钛白粉，降低配方成本。

When heated to 1 300 ℃, these metastable phases transformed into stable (3∶2) mullite,α-Al 2O 3 and cristobalite.

在室温 1 30 0℃热震过程中，这些亚稳相转变成稳定的(3∶ 2 )莫来石和α- Al2 O3，同时也有少量的方石英析出。

With over 225 production plants on five continents, Our Client is the undoubted world leader in the production of four industrial minerals: Silica sand and -flours, Cristobalite, Nepheline Syenite and Ball Clay.

在5大洲拥有超过225个生产基地，我们的客户在4种工业原料领域拥有无可置疑的领先地位：石英砂、粉，方石英，霞石，球粘土。

The crystallization rate of Mg-petalite increases with high ZrO〓/TiO〓 proportion.β-Quartz solid solution, cristobalite, zircon,α-cordierite and enstatite appear successively at high temperature.

随后玻璃中先后析出假蓝宝石相、β-石英固溶体、方石英、锆英石、α-堇青石和顽火辉石相。

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。

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。

Heating up to higher temperature nucleates the Mg-Al titanate crystallites with morphology like the droplet phase.

随后玻璃中先后析出β-石英固溶体、假蓝宝石、金红石、方石英、堇青石等。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。