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β-石英固溶体
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  β-quartz solid-solution
     Results show that only β - quartz solid-solution crystallization phase is obtained when heating the dried gels from 800 ℃ to 1 000 ℃, a stable tetragonal β- spodumene solid-solution begins to appear at 1 100 ℃ and all the β- spodumene solid-solution are obtained at 1 200 ℃.
     热处理温度在1 100℃时。 β-石英固溶体开始转变成稳定的四方晶系β-锂辉石固溶体,到1 209℃时已经完全转变为β-锂辉石固溶体。
短句来源
  β-quartz solid solution
     The results showed that the densification occured between 700~900℃, before the formation of crystalline cordierite, α-cordierite was formed through μ-cordierite, β-quartz solid solution and spinel at 1 150℃.
     研究结果表明:坯体的致密化过程先于MAS晶体的形成,该过程发生在700~900℃之间,α-MAS是通过μ-MAS、β-石英固溶体及尖晶石于1150℃反应而形成的。
短句来源
     The results show that with the increasing temperature magnesium aluminotitanate(MAT), β -quartz solid solution( β -QSS), sapphirine, spinel, α -cordierite, α -quartz, cristobalite, enstatite are precipitated in glass in sequence.
     结果表明 :随温度升高 ,玻璃中依次析出镁铝钛酸盐、β-石英固溶体、假蓝宝石、尖晶石、α -堇青石、α -石英、方石英、顽辉石等晶体。
短句来源
     The results clearly indicate that the employed variables-Fe2O3 concentrations (0-10 wt%) and crystallization time (0-100 hours) are directly responsible for the variation in the valence, coordination states, and the symmetry of the electrical environment of iron in the dominant crystallized β-quartz solid solution.
     结果指出,铁离子浓度(0~10重量%)和晶化时间(0~100小时)对铁在主晶相β-石英固溶体中的价态、配位状态和最邻近电子环境的不对称程度有直接的影响。
短句来源
     With the replacement of 5% , β- quartz solid solution precipitated first, then β- spodumene with increasing temperatures.
     当ZnO的取代量为5%时,首先析出的晶相仍为β-石英固溶体;
短句来源
     When the replacement was increased to 10% with crystallization at 820℃ , willemite appeared in addition to β- quartz solid solution and β- spodumene. Then the samples had higher flexural strength and fracture toughness.
     当ZnO的取代量增加到10%时,820℃高温晶化后,除了析出了β-石英固溶体、β-锂辉石固溶体外,还出现了硅锌矿相,使材料有较好的热性能和力学性能。
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  “β-石英固溶体”译为未确定词的双语例句
     After heat-treatment, the main crystal phase of the glass-ceramic was 3 -quarts solid solution, whose diameter was less than l00nm and volume 30-50%.
     经热处理后,微品玻璃的主晶相为β-石英固溶体,其晶粒直径小于100nm,体积份数为30~50%。
短句来源
     The result shows that, as far as the two-stage heating treatment, the crystalline phase of glass-ceramics with TiO2is same as that of the glass-ceramics with P2Os, the main crystals are -quartz S.S, which contributed to the lower thermal expansion coefficient of these glass-ceramics;
     结果表明:在两步法实验中,以TiO_2为晶核剂的微晶玻璃和以P_2O_5为晶核剂的微晶玻璃所析出的晶相是一样的,都是β-石英固溶体,使试样热膨胀系数比基础玻璃大大降低。
短句来源
     First, we research on the connection of MgO and ZnO-doping content with the glass ceramic's microstructure, mechanical performance and thermal expenditure. The results demonstrate that MgO and ZnO doping make the temperature of melt felled obviously.
     通过实验及对微晶玻璃微观结构的分析以及性能测试,结果表明:MgO和ZnO具有良好的助熔效果,主晶相都为β-石英固溶体,晶粒尺寸都在100nm左右。
短句来源
     It is found that, the law is induced mainly from regularly change of the content of p-quartz( low coefficient of thermal expansion, high density) resulting from transformation of condensate depression and crystal phase(β-quartz→β-spodumene).
     分析发现,这主要是由于过冷度的变化和晶型转变(β-石英固溶体→β-锂辉石)引起的β-石英固溶体(低膨胀系数、高密度)含量的规律性增减所造成的。
短句来源
     And the results demonstrate that transformation temperature and crystal temperature are smaller when the rate of TiO2/ZrO2 is 1. The temperature that P-quartz solid solution is transformed into p-spodumene solid solution is increased to 910℃.
     结果表明:ZiO_2和ZrO_2晶核剂含量相同时,使得微晶玻璃的转变温度和析晶温度都有所降低。 并且β-石英固溶体向β-锂辉石固溶体转变的温度上升至910℃。
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  β-quartz solid solution
The glass-ceramics contain a few crystal phases in which the main crystal phase is β-quartz solid solution and the second crystal phase is β-spodumene solid solution.
      
When the heat treatment temperature is not higher than 650°C, the transparent glass-ceramics containing β-quartz solid solution can be prepared.
      
β-quartz solid solution changes into β-spodumene solid solution at about 750°C.
      
The transparent β-quartz solid solution glass-ceramics can be divided into three areas: ultra-low expansion materials, refractory and colourless materials, and high electrical resistivity-low dielectric loss materials.
      
Substitution of ZrO2 for TiO2 also causes other changes in phase development, especially in the relative proportions of β-quartz solid solution and magnesian petalite produced during the early stages of crystallization.
      
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TEM,DTA, X-ray diffraction results reveal that there is a strong tendency of phaseseparation in the ZnO-Al_2O_3-SiO_2 (ZAS) glass.β-quartz solid solution would be crystal-lized out as metastable initial crystalline phase when the degree of phase separation ofthe original glass is low.Whereas β-quartz solid solution and β-willemite solid solutionwould both be crystallized out when the degree of phase separation is more perfect.Itwas found that the degree of phase separation not only determines the initial crystallinephase,...

TEM,DTA, X-ray diffraction results reveal that there is a strong tendency of phaseseparation in the ZnO-Al_2O_3-SiO_2 (ZAS) glass.β-quartz solid solution would be crystal-lized out as metastable initial crystalline phase when the degree of phase separation ofthe original glass is low.Whereas β-quartz solid solution and β-willemite solid solutionwould both be crystallized out when the degree of phase separation is more perfect.Itwas found that the degree of phase separation not only determines the initial crystallinephase, but also accelerates the crystallization of the ZAS glass.

透射电镜、差热分析以及X射线衍射分析的研究结果表明,ZnO-Al_2O_3-SiO_2(ZAS)玻璃具有较强的分相倾向。当原始玻璃的分相程度较低时,在晶化时析出的亚稳初晶相为β石英固溶体;若分相程度较完善,则析出的初晶相为β石英固溶体β硅锌矿固溶体。同时从实验结果得出:分相不仅会改变初晶相类型,而且会加速ZAS玻璃的析晶。

Moessbauer speetroscopy has been used to investigate aspects of the optical absorption of the Fe2O3-doped transparent glass-ceramic in the Li2O-MgO-Al2O3-SiO2 system.The relationship between moessbauer parameters (Isomer Shift I. S. and Quadrupole Splitting Q. S.) and optical absorption spectra has been analysed. The results clearly indicate that the employed variables-Fe2O3 concentrations (0-10 wt%) and crystallization time (0-100 hours) are directly responsible for the variation in the valence, coordination...

Moessbauer speetroscopy has been used to investigate aspects of the optical absorption of the Fe2O3-doped transparent glass-ceramic in the Li2O-MgO-Al2O3-SiO2 system.The relationship between moessbauer parameters (Isomer Shift I. S. and Quadrupole Splitting Q. S.) and optical absorption spectra has been analysed. The results clearly indicate that the employed variables-Fe2O3 concentrations (0-10 wt%) and crystallization time (0-100 hours) are directly responsible for the variation in the valence, coordination states, and the symmetry of the electrical environment of iron in the dominant crystallized β-quartz solid solution.

用穆斯堡尔谱(Moessbauer Spectroscopy)研究了掺铁Li_2O-MgO-Al_2O_3-SiO_2系统微晶玻璃的光吸收。分析了穆斯堡尔谱(MB)的两个主要参数——同质异能位移(Isomer Shift)和四极分裂(Quadrupole Splitting)与光吸收的关系。结果指出,铁离子浓度(0~10重量%)和晶化时间(0~100小时)对铁在主晶相β-石英固溶体中的价态、配位状态和最邻近电子环境的不对称程度有直接的影响。

The surface crystallization process in MgO-Al_2O_3-SiO_2 glass was investigated by several methods including DTA, XRD and SEM.Aggregated particles of β-quartz preci-pitated from natural surface of the glass.The aggregation of non-crystalline spherical particles of about 500—1000?. was observed in the region contiguous to the surface layer containing β-quartz.However, the number of spherical particles decreases with depth below the crystallized surface according to the logarithmic law, with the same particle-size...

The surface crystallization process in MgO-Al_2O_3-SiO_2 glass was investigated by several methods including DTA, XRD and SEM.Aggregated particles of β-quartz preci-pitated from natural surface of the glass.The aggregation of non-crystalline spherical particles of about 500—1000?. was observed in the region contiguous to the surface layer containing β-quartz.However, the number of spherical particles decreases with depth below the crystallized surface according to the logarithmic law, with the same particle-size substantially regardless of the depth. The precipitation of β-quartz,MgO·Al_2O_3·SiO_2 and α-cordierite was observed for the sample with polished surface. The surface crystal-lization in this case developed into the glass with the dendrite structure. In the glass, the amounts of β-quartz and MgO·Al_2O_3-SiO_2 reached the maximum value during iso-thermal treatment at 950℃, whereas the amount of α-cordierite increased monotonously with time.This suggests that α-cordierite is formed not only by the direct precipitation, but also by the transformation of β-quartz and MgO·Al_2O_3·SiO_2.

本文采用DTA、XRD,SEM等测试手段详细地研究了MgO-Al_2O_3-SiO_2系统玻璃的表面晶化过程。发现在玻璃的自由表面层中析出了密集的β石英固溶体结晶粒子,靠近该结晶粒子群的玻璃相中有大小为500—1000(?)的球形分相粒子群出现,其数量随表面深度的增加逐渐由密集、连续的分布过渡为呈指数规律减小的分布状态,而且分相粒子的大小与深度无关。而研磨表面的结晶层则由α堇青石、β石英固溶体、透锂长石型MgO·Al_2O_3·SiO_2晶体三种晶相组成,并呈树枝状向玻璃内部长大,靠近结晶层的玻璃相中也没有球形分相粒子群出现。在950℃下热处理的玻璃中,β石英固溶体和MgO·Al-2O_3·SiO_2晶体的析出量均随热处理时间的延长有极大值出现,而α堇青石的析出量则一直随时间的延长而增大。

 
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