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residual glass     
相关语句
  残余玻璃
     The sintered samples consist of 75~80vol% crystalline phases with the size ranging from 50 to 100nm,some residual glass phases and pores.
     微观结构主要为 75 %~ 80 %体积百分比的晶相 (晶粒尺寸为 5 0~ 10 0nm)、少量的残余玻璃相和气孔 ;
短句来源
     EPMA results show that element vanadium left in the residual glass after the crystals are formed, suggesting that element vanadium enter the glass network as a modifier which weaken structure of the glass and promote the crystallization.
     EPMA结果显示试样析晶后,V2O5留在残余玻璃中,表明V2O5没有参与晶体的直接形核,而是以网络外体的形式存在于玻璃体系中,削弱了玻璃的结构,导致晶体析出温度降低。
短句来源
  剩余玻璃
     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
  残留玻璃
     It was shown that the joint strength depended on the interfacial diffusive reaction between YAS solder and silicon nitride and the thickness of residual glass in the joint.
     微观分析表明:接头强度与YAS/Si3N4的界面扩散反应和接头残留玻璃相的厚度有关。
短句来源
  玻璃相
     The effect of the Cr 2O 3 and Mn 2O 3on properties of ZTM composites has been discussed by means of the studies of the bending strength,toughness,porosity,relative density,the residual glass content and microstructure.
     通过对试样的断裂强度、断裂韧性、相对密度、气孔率、玻璃相含量以及显微结构的研究 ,探讨了 Cr2 O3、Mn2 O3的添加对 ZTM陶瓷常温性能的影响。
短句来源
     It was shown that the joint strength depended on the interfacial diffusive reaction between YAS solder and silicon nitride and the thickness of residual glass in the joint.
     微观分析表明:接头强度与YAS/Si3N4的界面扩散反应和接头残留玻璃相的厚度有关。
短句来源
     With the Mn 2O 3 content increasing,the residual glass content of specimens would increase,but the bending strength decrease.
     Mn2 O3的添加可以增加试样的玻璃相含量 ,降低材料的力学性能
短句来源
     The brittleness of the residual glass or the invalidation of phase transformation of ZrO\-2,resulted in that the inter-type composite seemed to be the same degradation trend of residual strength,when compared with the ordinary refractory materials,under the low temperature. Whereas the trend of residual strength degradation of the nano/nano-type composite was not consistent with the result.
     低温深冷条件下 ,晶间型材料由于ZrO2 马氏体相变的失效和残余微量玻璃相的脆化 ,表现出与普通耐火材料相似的残余强度衰变趋势 ,而纳米 /纳米型材料却呈现与高温热冲击条件下相似的变化趋势
短句来源
     The sintered samples consist of 75~80vol% crystalline phases with the size ranging from 50 to 100nm,some residual glass phases and pores.
     微观结构主要为 75 %~ 80 %体积百分比的晶相 (晶粒尺寸为 5 0~ 10 0nm)、少量的残余玻璃相和气孔 ;
短句来源

 

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      residual glass
    The residual glass facilitating apatite formation is considered to provide a negatively charged surface developed during its corrosion in the surrounding solution.
          
    It is proposed that the apatite formation on the surface of the glass-ceramic is mainly caused by its residual glass.
          
    Estimation of the amounts of residual glass in devitrified cordierite
          
    In addition to crystal growth, the crystallisation heat treatment results in a phase separation of the residual glass whereby smaller silicon and nitrogen rich amorphous features form.
          
    As a consequence of this, the degree of crystallisation and the composition of the residual glass will, for equivalent glasses, also depend on the cation radius.
          
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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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