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residual glass phase
相关语句
  剩余玻璃相中
     Cr ̄(3+) ions almost universally favoroctahedral coordination in crystalline phase,andNd ̄(3+) would concentrate in the residual glass phase。 The distribution of sites for Cr ̄(3+) ions will affect onthe spectroscopic characteristics in Cr and Nd dopedglassceramics.
     Cr ̄(3+)主要位于晶相格位中,Nd ̄(3+)则全部保留在剩余玻璃相中,Cr ̄(3+)的格位分布对光谱性能有很大的影响。
短句来源
  “residual glass phase”译为未确定词的双语例句
     residual glass phase with high melting point and proper high-melting supplement such as Y-2O-3,Al-2O-3 can reduce crystal grain size at the same time that does not modify nucleation quantity; transparent glass-ceramic with 0.1~0.3μm crystal grains is obtained.
     通过抑制主晶相(Li2O.2SiO2)晶粒的生长,最终获得了晶粒尺寸为0.1~0.3μm的透明微晶玻璃。
短句来源
  相似匹配句对
     DETERMINATION OF RESIDUAL STRESS IN CAS GLASS CERAMICS
     CAS系统微晶玻璃残余应力测定
短句来源
     A New Explanation of the Residual Entropy in Glass Systems
     玻璃系统零点剩余熵的一种新解释
短句来源
     HEART OF GLASS
     玻璃诱惑
短句来源
     Glass onion
     玻璃洋葱
短句来源
     Methods Residual smearing.
     方法药膜法。
短句来源
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  residual glass phase
The microstructure is characterised by fine crystals uniformly distributed arbitrarily oriented throughout the residual glass phase.
      
A change of composition of the residual glass phase in the glass-ceramic product, in comparison with the parent glass, is considered to explain, in comparative terms, the higher toxic potential of the glass-ceramic over the glass.
      
The crystallization process of the glass phase can be taken almost to completion but a small proportion of residual glass phase is present.
      
The mismatch of thermal expansion coefficient between the crystalline phases and the residual glass phase plays an important role in changing the mechanical properties.
      
It is suggested that grain growth is controlled by precipitate particles rather than by residual glass phase.
      
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The transparent glass-ceramics in thesystem of B_2O_3-Al_2O_3-SiO_2 codoped by Cr ̄(3+) and Nd ̄(3+)were prepared by heat treatment in one step processaccording to the principle of phase segregation,andusing the analytically pure raw materials.The maincrystalline phase checked by XRD is a mullite solidsolution。Absorption,emission spectra and lifetimeof samples were measured.The distribution of sitesfor Cr ̄(3+) and Nd ̄(3+) in samples and the spectroscopiccharacteristics were analyzed and discussed bycontrasting...

The transparent glass-ceramics in thesystem of B_2O_3-Al_2O_3-SiO_2 codoped by Cr ̄(3+) and Nd ̄(3+)were prepared by heat treatment in one step processaccording to the principle of phase segregation,andusing the analytically pure raw materials.The maincrystalline phase checked by XRD is a mullite solidsolution。Absorption,emission spectra and lifetimeof samples were measured.The distribution of sitesfor Cr ̄(3+) and Nd ̄(3+) in samples and the spectroscopiccharacteristics were analyzed and discussed bycontrasting co-doped samples with singly-dopedones,The absorption spectra of co-doped sample isapproximately equal to the superimposition ofabsorption of singly-doped Cr ̄(3+) on that of Nd ̄(3+)sample。The intensity of emission at 700 nm for theco-doped sample by 647 nm excitation is only 65%ofthat of singly-doped Cr ̄(3+),and the intensity ofemission at 700 nm and 775 nm by 568 nm excitationare 87%and 70%respectively。 The Nd ̄(3+) lifetimeobserved at 1060nm is increased bv 45%due toradiation trapping in the co-doped sample comparedto the sample containing only Nd ̄(3+).This shows thatthere are radiative and nonradiative transfer of energyfron Cr ̄(3+) to Nd ̄(3+) and there is also energy transferfrom Cr ̄(3+) to Cr ̄(3+)。Cr ̄(3+) ions almost universally favoroctahedral coordination in crystalline phase,andNd ̄(3+) would concentrate in the residual glass phase。The distribution of sites for Cr ̄(3+) ions will affect onthe spectroscopic characteristics in Cr and Nd dopedglassceramics.

根据分相成核原理,通过一步热处理过程,制备了双掺杂B_2O_3→Al_2O_3→SiO_2系统透明玻璃陶瓷。XRD分析确定主晶相为莫来石固溶体;分别测定了材料的吸收光谱、发射光谱和荧光寿命,分析讨论了铬和钕格位分布及光谱特点。在双掺杂铬和钕玻璃陶瓷中存在较强的Cr ̄(3+)→Nd ̄(3+)的辐射能量传递和非辐射传递,同时也存在Cr ̄(3+)→Cr ̄(3+)的能量传递。Cr ̄(3+)主要位于晶相格位中,Nd ̄(3+)则全部保留在剩余玻璃相中,Cr ̄(3+)的格位分布对光谱性能有很大的影响。

The effects of Cr2O3 on the nucleation and crystallization of R2O-CaO-Al2O3-SiO2 system glasses have been investigated by means of ESR,STEM,EDAX,XRD,DTA and so on . The results show that the hase glass eontaining more than 1. 5 wt% Cr2O3 can be nucleated internally and converted to spheroidal erystals inlaid glass matrix. The spheroidal crystal consists of fibrous wollastonite crystals radiating from a centre . The residual glass phase filled the interstices between the fibres and the spherulltes. The...

The effects of Cr2O3 on the nucleation and crystallization of R2O-CaO-Al2O3-SiO2 system glasses have been investigated by means of ESR,STEM,EDAX,XRD,DTA and so on . The results show that the hase glass eontaining more than 1. 5 wt% Cr2O3 can be nucleated internally and converted to spheroidal erystals inlaid glass matrix. The spheroidal crystal consists of fibrous wollastonite crystals radiating from a centre . The residual glass phase filled the interstices between the fibres and the spherulltes. The spheruHte diameter ranges from 3.0 to 4.0 mm,depending upon the heat treatment schedules. EDAX analysis proved that the spheruHte centre composition enrich with Cr3+and Ca2+ions. During heat treatment process,the valence states of chromium changed from Cr6+ to Cr3+and precipitated Cr-spinel [CaCr2O4]simultaneously, the Cr-spinel could act as a nucleating center on which the principal crystalline phase of wollastonite grew epitaxially. The colse similarity of lattice parameters in some dimension of Cr-spinel and wollastonite made it possible to nucieate heterogeneously. From this study,a new kind of building material named Crystallized Glass can be obtained.

采用顺磁共振(ESR)、扫描电镜(SEM)、能谱分析(EDAX)、X射线衍射(XRD)等实验方法,研究了Cr_2O_3对R_2O-CaO-Al_2O_3-SiO_2系统玻璃析晶行为的影响,并对其球状析晶机理进行了分析。球晶是由放射状的针形晶体所构成,尺寸约为几个毫米,且呈均匀分布,主晶相为β-CaSiO_3。析晶机理是玻璃中的铬在热处理过程中首先以铬钙尖晶石固熔体[CaCr_2O_4]的形式析出,然后β-CasiO_3以铬钙尖晶石为成核位析出放射状的针形晶体,各针形晶体之间为玻璃相。

Mica_containing glass-ceramics before and after hot_pressing treatment were investigated by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). It is found that mica crystals randomly dispersed in the glass matrix before hot_pressing orientate preferentially after hot_pressing treatment,combining with the viscous flow of the residual glass phase. After hot_pressing treatment,both fracture toughness and bending strength constantly increase with the crystallization time and hot_pressing...

Mica_containing glass-ceramics before and after hot_pressing treatment were investigated by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). It is found that mica crystals randomly dispersed in the glass matrix before hot_pressing orientate preferentially after hot_pressing treatment,combining with the viscous flow of the residual glass phase. After hot_pressing treatment,both fracture toughness and bending strength constantly increase with the crystallization time and hot_pressing deformation. This is attributed to the variation of the microstructure, i.e., mica crystals preferentially oriente in the glass matrix,which effectively deflect the crack propagation along the direction of hot_pressing.

用X射线衍射(XRD)和扫描电镜(SEM)对经过热压处理前后微晶玻璃进行了分析.结果发现,微晶玻璃中随机取向的云母晶体在热压过程中随着残余玻璃相的高温粘滞流动而发生定向排列.热压后定向排列的云母晶体对沿热压方向扩展的裂纹的偏转作用增强,使得热压方向上微晶玻璃的强度和断裂韧性增加.

 
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