Cristobalite

A study on the cristobalite of the high quartz porcelain body

高石英瓷坯中方石英的研究

Key to study of α - cristobalite durable China

α-方石英强化日用瓷研制过程中几个关键问题分析

Effect of Cristobalite Content on properties in silicon carbide material bound with oxide

方石英含量对氧化物结合SiC材料性能的影响

Effect of Heat Treatment Parameters on Cristobalite Content in Li_2O-ZnO-SiO_2 Glass-ceramics

热处理参数对锂锌硅系微晶玻璃中方石英相含量的影响

Effects of Raw Materials on Formation of Cristobalite

原料对方石英生成的影响

Cristobalite Transformation and Its Role in Investment Casting

方石英转变及其在熔模铸造中的意义

Explore of Nonlinear Optical Crystals in Ordered Cristobalite Series

有序方石英矿非线性光学晶体的探索

Effects of Cristobalite Content of Silica Base Ceramics Core on the Rate of Qualified Pouring

硅基陶瓷型芯方石英含量与叶片浇注不露芯率的关系

Crystal structure and morphology of α cristobalite in silica bricks

硅砖中α-方石英的晶体结构与形貌

High-temperature transformation of Changbaishan diatomite and the formation mechanism of cristobalite

长白山硅藻土热处理相变及方英石形成机制探讨

The Development of α - cristobalite Reinforced Porcelain

α&方石英强化瓷的研制

Effect of Cristobalite Content on the Properties of Ceramic Core in Making Directionally Solidified Hollow Blade

影响定向空心叶片陶瓷型芯性能的一个重要因素&方石英含量的控制

After heating to 1000 ℃, X-ray powder diffraction will show characteristic lines due to mullite and cristobalite .

在叶蜡石加热到1000℃后的X射线粉晶衍射谱图上，出现了莫来石和方英石的特征谱线。

Vibrational spectrum of β cristobalite and phase transition of cristobalite

β方石英的振动光谱和方石英的相变

As a consequence a good set of the six valence force constants for β cristobalite is given .

由此提供了一组甚好的β方石英的力常数。

Calculation of the vibrational spectrum of α cristobalite

α方石英振动光谱的计算

The main crystalline of this system is not identified , while the accompanied crystalline is α - cristobalite .

析晶中主晶相类别尚未查清，次晶相确定为α－方石英。

Furthermore , when temperature approaching 1 300 ℃, amorphous SiO_2 was crystallized into cristobalite .

1300℃时，不定形SiO2进一步结晶形成方石英。

It appears cristobalite and mullite , when the temperature reach 1350C .

当温度达到1200℃时，出现方英石及莫来石相。

Preparation of Cristobalite by Direct Calcination with Nubby Quartz

石英块料直接煅烧法生产方石英

There are low temperature quartz , cristobalite and amorphous silica in the surface oxidation layer after the oxidation at 1 500 ℃ .

1500℃氧化后的表面氧化层中同时存在低温石英、方石英和非晶态SiO2。

DISCUSSION ON METASTABLE FORMATION MECHANISM OF CRISTOBALITE 1 Preparation of tridymite and cristobalite from α - quartz was studied .

方石英的亚稳态形成机制探讨本文介绍了一种从α-石英制取鳞石英和方石英的疗法和条件。

On the morphology of α - cristobalite

α方石英的结晶形貌

Montmorillonite , quartz and cristobalite can be corroded by sodium hydroxide solution , but will introduce new impurity phase similar to zeolite .

氢氧化钠溶蚀法会对蒙脱石、石英和方石英同时产生溶蚀，引入新的物相杂质。

The cristobalite , transformed from amorphous silica basically , is ubiquitous in the thermodynamic stable region of quartz or tridymite .

方石英形成于石英或鳞石英热力学稳定区是一种普遍的现象，并基本上是由非晶态SiO2转变而成。

The inducing effect of sodium makes amorphous silica transferred to α cristobalite during calcination , and the specific surface area decreases enormously as a consequence .

结果表明，Na的诱导作用使无定型氧化硅在焙烧过程中相变为α-方石英结构，同时伴有比表面积的大幅度下降；

All of the fundamental frequencies and the normal modes of the transverse optical vibration of β cristobalite have been calculated on the basis of the valence force field model .

利用价力场模型计算了β方石英振动光谱横模的全部基频和简正模式。

When roasted at 1150 ℃, the amorphous silica of which diatomite is composed crystallized into α - cristobalite .

焙烧达1150℃时，原组成无定形二氧化硅则晶化为α-方石英，除吉林土具有一级孔洞。

The montmorillonite containing impurities which is difficult to remove such as cristobalite was purified . The purification effectiveness of traditional centrifugal purification method and alkali extraction purification method were compared .

本文研究了含有方英石等难去除杂质蒙脱土的提纯，比较了传统湿法提纯与碱提取法提纯效果的差别。

XRD analysis showed that both of the main phases in the samples of series B are a-SiC , andalusite , mullite and cristobalite before and after thermal shock .

相组成分析表明，B2配方样品热震前后的主晶相均为a-SiC、红柱石、莫来石和方石英。