At high temperature ( 1100 ℃) the opal α christobalite and α tridymite in the blue opal are thermally transformed into β tridymite .

在高温下（1100℃），蓝欧泊中的蛋白石、α-方英石和α- 鳞 石英热相变为β-鳞石英。

This study can help refractories enterprises in south China resolve their problem such as low content tridymite and properties of silica brick for coke oven .

本研究的 成果有助于南方耐火材料生产企业解决焦炉硅砖 制品 普遍 存在着的 鳞 石英含量和性能 指标不足等问题。

The notes describe the common minerals such as quartz and its polymorphs coesite tridymite and cristobalite feldspar plagioclase feldspathoids pyroxenes amphiboles etc.

讲稿详细地介绍了火成岩矿物，如：石英及它的同构异形体、柯石英、 鳞 石英、方石英、长石、斜长石、似长石、辉石、闪石等矿物。

The process of crystallization at a temperature range of 1200 ~ 1300 ℃ is a-quartz firstly converting into a-cristobalite and then to a - tridymite .

1200和1300℃析晶规律是：首先α-石英转变为α-方石英，然后转变为α- 鳞 石英。

The phase components of unused silica brick which is sintered in 1 430 1 450 ℃ for 48 72 h are mainly the tridymite and cristobalite with small amount of remainder quartz .

1430～1450℃经48～72h烧成未用的硅砖主相 为 鳞 石英和方石英，并有少量残留石英。

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 gas face there are tridymite silicate C 3 P glass phase and also a few precipitated carbon . Finite Element Method for the Steady-State Performance Analysis of Different Groove Gas Face Seals

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。不同槽型气体端面密封稳态特性的有限元分析

XRD analysis showed that the main crystal phase of the refractory waste was corundum and the secondary was mullite and tridymite and the main phase of the ceramic ball was corundum and the secondary was mullite spinel anorthite and tridymite .

XRD分析表明瓷球的主晶相为刚玉，次为莫来石， 尖晶石、钙长石和磷石英。

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 order of toxicity is found to be tridymite > α & quartz > silica gel .

毒性 作用顺序为 ： 鳞 石英>α&石英>硅胶。

The results showed that suitable grain size distribution 、 firing temerature 、 soaking time and shaping pressure really can reduce the density 、 swelling and residual quartz ; improve the content of tridymite .

结果表明，选择适当的粒度配料、烧成温度和保温时间可以降低硅砖的真密度、残余膨胀及残余石英，提高 鳞 石英的含量。

The addition of Si 3N 4 particles to carbon fiber reinforced silica composite increases the mechanical properties but decreases the thermal properties of the composite because of the precipitation of tridymite .

在碳&石英复合材料中加入氮化硅颗粒可提高其力学性能，但 少量 鳞 石英的析出使材料的热学性能 恶化。

The effect of addition of P_2O_5 in a few thousandths on the devitrification behavior of plate glass with primary phase of tridymite is different from that with primary phase of wollastonite .

在初 晶相 为 鳞 石英的平板玻璃中加入千分之几的P2O5后对析晶性能的影响与初晶相为硅灰石的平板玻璃是不同的。

This paper deals with the causes and localization of tridymite stone by means of petro-graphic analysis of bricks laid at different site of furnace while cold repair .

对冷修熔窑各部位砖材进行岩相分析，结合生产实际情况，判断 鳞 石英的产生原因及产生部位。

The ξ electric potentials of tridymite α - quartz and silica gel before and after being reacted with lecithin have been determined .

测定了 鳞 石英、α&石英和硅胶以及 它们和卵磷脂作用的表面ξ电位，研究了 它们对家兔 肺泡 巨噬细胞 的 毒性 作用。