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sintering
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  烧结
    Study on Mechanism of Pulse Electric Current Sintering of Ceramic Materials
    陶瓷材料脉冲电流烧结机理的研究
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    Study on the Low-Temperature Sintering Characters and Electeic Properties of Mn-Co-Ni-O Based NTC Thermistors
    Mn-Co-Ni-O基NTC热敏半导体陶瓷的低温烧结与电性能研究
短句来源
    DISCUSSION ON THE STRUCTURE OF LIQUID PHASE AND THE SINTERING OF CERAMIC MATERIALS
    陶瓷材料液相烧结的有关液相结构问题
短句来源
    ON THE SINTERING BEHAVIOUR OF HIGH K_2O BAUXITE(COUNTRY OF ORIGIN—GONGXIAN COUNTY,HENAN)
    河南巩县高K_2O矾土烧结性能的研究
短句来源
    A STUDY ON ACTIVATED SINTERING OF NATURAL MAGNESITE
    菱镁矿活化烧结研究
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  烧成
    Study on Cell Parameters of Ba_(0.77)Sr_(0.23)TiO_3 Prepared Under Different Sintering Conditions
    不同烧成条件下Ba_(0.77)Sr_(0.23)TiO_3的晶胞参数研究
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    The Influence of Sintering and Polarizing Conditions on the Electrical Properties of PZT-BF-BCN System Piezoceramics
    烧成和极化条件对PZT-BF-BCN系压电陶瓷电性能的影响
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    The homogeneity of sintering in modern ceramic tunnel kiln
    现代陶瓷隧道窑的烧成均匀性
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    SINTERING CONDITION INFLUENCE ON CERAMIC DIELECTRIC PROPERTY
    烧成条件对瓷料介电性的影响
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    Design of Temperature and Atmosphere Control System for Ceramic Sintering Furnace
    陶瓷烧成炉温度及气氛控制系统设计
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  烧结的
    DISCUSSION ON THE STRUCTURE OF LIQUID PHASE AND THE SINTERING OF CERAMIC MATERIALS
    陶瓷材料液相烧结的有关液相结构问题
短句来源
    THE EFFECT OF VARYING TECHNICAL PARAMETERS AND NiO--DOPING ON SINTERING OF Al_2O_3 CERAMICS
    不同工艺参数和NiO对Al_2O_3瓷烧结的影响
短句来源
    The Sintering of Aluminous Porcelain under the Influence of Mineralizer
    矿化剂对高铝瓷烧结的影响
短句来源
    Study on sintering of dolomite
    白云石烧结的试验研究
短句来源
    Mechanism of Microwave Enhancing Sintering Ceramics
    微波促进陶瓷烧结的微观机制
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  “sintering”译为未确定词的双语例句
    SYNTHESIS AND SINTERING OF NAZr_2P_3o_(12)POWDER
    NaZr_2P_3O_(12)粉体的制备和性能
短句来源
    THE INFLUENCE OF B_2O_3-Y_O_3 AS SINTERING AID ON MICROSTRUCTURE AND PROPERTIES OF AIN CERAMICS
    B_2O_3-Y_2O_3添加剂对AlN陶瓷显微结构及性能的影响
短句来源
    STUDY ON HIGHLY CONCENTRATED Si_3N_4 SLURRY(Ⅰ)──THE INFLUENCE OF DEFLOCCULANTS ON THE COLLOIDAL BEHAVIOUR OF Si3N4 AND SINTERING ADDITIVES
    高固相含量Si_3N_4浆料的研究(Ⅰ)──分散剂对Si_3N_4及助烧结剂胶体
短句来源
    MECHANISM OF SINTERING CLINOPYROXENE SOLID SOLUTION CaMgSi 2O 6 NaAlSi 2O 6
    单斜辉石固溶体CaMgSi_2O_6的合成机理研究
短句来源
    ANALYSIS ON THE RHEOLOGY PROCESS OF GLASS SINTERING
    玻璃熔接过程中的流变分析
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  sintering
Steam produced during the decomposition process accelerated the sintering of MgO, and MgO with surface area as high as 412 m2 · g-1 was obtained through calcining its precursor in flowing dry nitrogen at 520°C for 4 h.
      
The fabrication procedure involved a double-sintering process in a rich-Mg environment.
      
Samples with the equally high density and matching superconducting properties were obtained as well by a triple sintering process of the MgB2 powder directly from Alfa Aesar.
      
The specific surface areas are different before sintering, and have a slight difference after sintering.
      
Besides, the impurity phase, tetracalcium phosphate, appeared during ultrasonic atomizing procedure, and can be completely removed after sintering at 650°C for 1 h.
      
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In this paper, the heat changes and sintering mechanism of various Chinese high-alumina clays are discussed. It is considered that secondary mullitisation and liquid phase action are the two principal factors influencing the sintering of these clays. The importance of control-ling these two factors in improving the quality of high-alumina refractories is emphasised. Formulae are derived from sintering curves, indicating the relationship between the extent of sintering and the Al_2O_3/SiO_2...

In this paper, the heat changes and sintering mechanism of various Chinese high-alumina clays are discussed. It is considered that secondary mullitisation and liquid phase action are the two principal factors influencing the sintering of these clays. The importance of control-ling these two factors in improving the quality of high-alumina refractories is emphasised. Formulae are derived from sintering curves, indicating the relationship between the extent of sintering and the Al_2O_3/SiO_2 ratio. Based on the process of liquid sintering, the diferences in sintering behaviors of various clays are explained.

本文讨论了我国各地高铝矾土加热过程的变化和烧结机理。认为影响矾土烧结的两个主要因素是二次莫来石化和液相作用,因而提高高铝耐火材料质量的关键,在于控制这两个因素。根据烧结曲线导出计算公式,说明烧结程度和Al_2O_3/SiO_2比例的关系。还根据矾土液相烧结进程,推论各等矾土烧结难易的原因。

The transparency of sintered alumina with additives and the effects of some technological parameters on it were introduced. It was analysed that the loss of light after it passing through Al2O3 ceramics consists of absorption, reflection and scattering, and that there is a basic law relating to these losses. The effect of pores on the transparency of Al2O3 ceramics was emphasized. According to the experimented results in studying the transparent Al2O3 ceramics, the influence factors of transparency, the purity...

The transparency of sintered alumina with additives and the effects of some technological parameters on it were introduced. It was analysed that the loss of light after it passing through Al2O3 ceramics consists of absorption, reflection and scattering, and that there is a basic law relating to these losses. The effect of pores on the transparency of Al2O3 ceramics was emphasized. According to the experimented results in studying the transparent Al2O3 ceramics, the influence factors of transparency, the purity of initial material, the phase transformation temperature, the additives, the grinding and the sintering schedule, were analysed. It was shown that the refractive index of the grain boundary phase was raised when MgO, La2O3 etc. composite additives were used. Hence the scattering decreased and the transparency of Al2O3 ceramics increased. The transparent sintered Al2O3 ceramics was already used in high pressure sodium vapos discharge lamp and electronic insulation equipments. It is sure that further development will be made in its applications in our country.

本文介绍了氧化铝陶瓷的透光原理和影响透光性的若干因素。文中分析了光通过氧化铝陶瓷时损失的几个组成部分──吸收损失、反射损失和散射损失,以及这几种损失的基本规律,特别是气孔对于Al2O3陶瓷透光性的影响。文中结合研制透明Al2O3陶瓷的实验,从原料纯度、转相温度、外加剂、球磨工艺与烧成工艺等几方面分析了透光性的影响因素。介绍了由于使用MgO,La2O3等复合外加剂,提高了晶粒边界相的折射率,从而减少了散射,提高了Al2O3陶瓷的透光性。透明Al2O3陶瓷已在高压钠灯、电绝缘装置方面得到应用,今后在我国还将得到更大的发展。

The formation of divacancies in MgO, their amount, the influence from dopant andthe influence on sintering were studied. There are many arrangements of the □Mg~(2+) and □o~(2-) in MgO. By some arrangementsdivacancy will not be formed.The probability is less than one. The concentration of diva-cancies formed at 1,800℃ is estimated as less than 10~(-5). When MgO is doped with Fe_2O_3, the concentration of divacancies is increased, andthere are two mechanisms of the formation of divacancies. The dopant Fe_2O_3...

The formation of divacancies in MgO, their amount, the influence from dopant andthe influence on sintering were studied. There are many arrangements of the □Mg~(2+) and □o~(2-) in MgO. By some arrangementsdivacancy will not be formed.The probability is less than one. The concentration of diva-cancies formed at 1,800℃ is estimated as less than 10~(-5). When MgO is doped with Fe_2O_3, the concentration of divacancies is increased, andthere are two mechanisms of the formation of divacancies. The dopant Fe_2O_3 in MgO will generate valence-differed vacancies which increase theprobability of formation of divacancies, but not effective. For instance, when MgO isdoped with 1.2~1.4% Fe_2O_3, the concentration of valence-differed vacancy is only 8%of the thermal equilibrium vacancies by 1,800℃. Fe~(3+) is more effective. In absence of □o~(2-), Fe~(3+) will first combine with □Mg~(2+) to formthe complex (Fe~(3+)-3/2□Mg~(2+)). The complex diffuses easily. When the complex meets□o~(2-), it will give out the □Mg~(2+). The □Mg~(2+) combines with □o~(2-) and forms divacancy.Fe~(3+) is left and diffuses. When Fe~(3+) meets □Mg~(2+), then the complex is formed again.When the complex meets □o~(2-), it gives out □Mg~(2+) again, and the divacancy is formedagain。This cycle will be repeated again and again, until the majority or the whole of thethermal equilibrium vacancies form divacancies. Fe~(3+) acts as a catalyst. If the magnesite is fired to 1,820℃, the specific gravity will be decreased by 0.017~0.077 in comparison with the maximum specific gravity. The decreament is correspondingto the divacancies with the concentration of 10~(-3)~10~(-2), near the concentration of divacan-cies(10~(-2.5)) formed from the whole thermal equilibrium vacancles at 1,800℃. With the magnesite containing 93%MgO, 1.5%Fe_2O_3, fired at 1,800℃, to make magne-site brick, fired at 1,600℃, the apparent porosity is 0%~2%. The high sinterability is dueto divacancies. With the aid of the theory of divacancies, the reason of the accelerating effect ofFe_2O_3 to the sintering of MgO brick and the reason of non-accelerating effect when theFe_2O_3 is added to the batch are interpreted.

研究了MgO中双空位的生成、生成量,溶质对双空位生成量及对烧结的影响。 MgO中Mg~(2+)空位及O~(2-)空位相互间有种种排列方法。有些排列方法不能生成双空位。生成双空位的几率小于一.经计算,得知在1800℃生成双空位的浓度在10~(-5)以下。 在MgO内加入Fe_2O_3后,经由二种机理,双空位浓度大增。 Fe_2O_3溶入MgO后,发生价差空位。价差空位可提高双空位生成的几率,但效果不大。以1.2~1.4% Fe_2O_3溶于MgO而论,在1800℃价差空位浓度只有热平衡空位之8%。不能提高双空位生成几率甚多。 发生最大作用者为Fe~(3+)先是Fe~(3+)与□_Mg~(2+)生成复合体(Fe~(3+)-3/2□_Mg~(2+))。这个复合体扩散甚易。当它与□o~(2-)接触时,放出□_Mg~(2+),□_Mg~(2+)o~(2-)生成双空位。剩下的Fe~(3+)扩散,与□_Mg~(2+)接触,又生成复合体。复合体再扩散,再与□o~(2-)接触,再放出□_Mg~(2+),再生成双空位。如此循环不已,可将大部分以至全部热平衡空位生成双空位。Fe~(3+)实际上是个触媒。在1820℃烧成的镁砂比重降...

研究了MgO中双空位的生成、生成量,溶质对双空位生成量及对烧结的影响。 MgO中Mg~(2+)空位及O~(2-)空位相互间有种种排列方法。有些排列方法不能生成双空位。生成双空位的几率小于一.经计算,得知在1800℃生成双空位的浓度在10~(-5)以下。 在MgO内加入Fe_2O_3后,经由二种机理,双空位浓度大增。 Fe_2O_3溶入MgO后,发生价差空位。价差空位可提高双空位生成的几率,但效果不大。以1.2~1.4% Fe_2O_3溶于MgO而论,在1800℃价差空位浓度只有热平衡空位之8%。不能提高双空位生成几率甚多。 发生最大作用者为Fe~(3+)先是Fe~(3+)与□_Mg~(2+)生成复合体(Fe~(3+)-3/2□_Mg~(2+))。这个复合体扩散甚易。当它与□o~(2-)接触时,放出□_Mg~(2+),□_Mg~(2+)o~(2-)生成双空位。剩下的Fe~(3+)扩散,与□_Mg~(2+)接触,又生成复合体。复合体再扩散,再与□o~(2-)接触,再放出□_Mg~(2+),再生成双空位。如此循环不已,可将大部分以至全部热平衡空位生成双空位。Fe~(3+)实际上是个触媒。在1820℃烧成的镁砂比重降低0.017~0.077。这一降低数相当具有浓度为 10~(-3)~10~(-2)的双空位,与1800℃热平衡空位完全生成双空位的浓度(10~(-2.5)近似。 用含Fe_2O_31.5%、MgO93%,在1800℃烧成的镁砂制砖,在1600℃烧成,显气孔率为0~2%。?

 
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