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石英     
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  quartz
    Hermetic diffusion sealing of GKZ-A quartz and tungsten at high temperatures
    GKZ-A型石英与钨的高温扩散封接
短句来源
    A STUDY ON THE CRISTOBALITE OF THE HIGH QUARTZ PORCELAIN BODY
    高石英瓷坯中方石英的研究
短句来源
    A STUDY ON THE INTERFACIAL STRUCTURE BETWEEN HARDENED CEMENT PASTE AND QUARTZ AGGREGATE IN DAM CONCRETE
    大坝混凝土的水泥石-石英集料界面结构研究
短句来源
    FLUIDIZED-BED DRYING SYSTEM FOR FINE QUARTZ POWDER
    石英细粉流化床干燥系统
短句来源
    Study of Quartz Ceramic from Fused Quartz
    熔融石英石英陶瓷研究
短句来源
更多       
  quartz powder
    FLUIDIZED-BED DRYING SYSTEM FOR FINE QUARTZ POWDER
    石英细粉流化床干燥系统
短句来源
    Used various of sources of SiO2, Si2N2O was prepared by carbothermal reduction and nitridation of SiO2. Thesesoures of SiO2 were: (A)natural quartz powder; (B) Na2SiO3;
    本文通过对比实验,分别以(1)天然石英粉(2)硅酸钠(3)碳酸钠与天然石英粉(4)活性SiO2等为原料合成氮氧化硅(Si2N2O)粉末。
短句来源
    This paper intro-duces the design of a fluidized-bed drying system for wet recovered fine quartz powder and the result of its operation briefly.
    本文简要介绍石英细粉流化床干燥系统的设计和应用情况。
短句来源
    (C) natural quartz powder mixed Na2CO3, and (D) ac-tivated SiO2. The following conclussions could be obtained by comparing the experiment results: (1) It is difficult tosynthesize Si2N2O from Source (A);
    实验结果表明:直接碳热还原氨化天然石英粉,难以合成Si2N2O。
短句来源
  fused quartz
    Study of Quartz Ceramic from Fused Quartz
    熔融石英石英陶瓷研究
短句来源
    Study on Behavior of Highly Concentrated Fused Quartz Ceramic Aqueous Suspension with Low Viscosity
    高固相、低粘度熔石英陶瓷料浆特性的研究
短句来源
    Study on Gelation Process of Fused Quartz Ceramics Gelcasting Method and Their Influence Factors
    熔石英陶瓷凝胶注模成型的凝胶固化过程及其影响因素
短句来源
    The fused quartz ceramics refer to the products which use the quartz glass or the fused quartz as raw materials, by a series of ceramic shaping technology, such as brokenness, shaping, sintering.
    石英陶瓷是指以石英玻璃或熔融石英为原料,经破碎、成型、烧成等一系列陶瓷的制作工艺制备的制品,又称为熔融石英陶瓷。
短句来源
    The paper studies the structure of the fused quartz, the performances of the kiln furniture bonded with two binders and the cystallization structure at high temperature. The optimum composition are determined by comparing the performances of kiln furniture for different binders and contents(30% for high alumina and 20% for clay binder). The crystallization structure(α-cristobalite, α-quartz) at high temperature firing and contents are determined.
    主要对熔融石英结构、不同结合剂结合的窑具性能和高温析晶结构进行研究.通过不同结合剂含量的性能比较,确定最佳配方(高铝结合剂最佳含量为30%,粘土结合剂最佳含量为20%),高温烧成析晶结构(α-石英,α-方石英,莫来石)及其含量.
短句来源
  natural quartz
    Used various of sources of SiO2, Si2N2O was prepared by carbothermal reduction and nitridation of SiO2. Thesesoures of SiO2 were: (A)natural quartz powder; (B) Na2SiO3;
    本文通过对比实验,分别以(1)天然石英粉(2)硅酸钠(3)碳酸钠与天然石英粉(4)活性SiO2等为原料合成氮氧化硅(Si2N2O)粉末。
短句来源
    With natural quartz as raw materials, Si 3N 4 powders were synthesized by carbonthermal reduction method.
    以天然石英为硅源 ,用碳热还原法合成出了平均粒径为 1μm的Si3N4粉末。
短句来源
    A Study of Synthesis of Si_3N_4 Powder from Natural Quartz
    用天然石英合成氮化硅的研究
短句来源
    THERMAL KINETIC DESORPTION OF GASLIQUID IMPURITIES IN NATURAL QUARTZ
    天然石英中气-液杂质的热动力解吸
短句来源
    (C) natural quartz powder mixed Na2CO3, and (D) ac-tivated SiO2. The following conclussions could be obtained by comparing the experiment results: (1) It is difficult tosynthesize Si2N2O from Source (A);
    实验结果表明:直接碳热还原氨化天然石英粉,难以合成Si2N2O。
短句来源
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  quartz
The PI solutions were micro-contact printed with the elastomeric PDMS replica on quartz slides.
      
Good surface-relief-grating structures were formed on the quartz slides.
      
The quartz slides covered with surface-relief-grating polymide (PI) films were then assembled into liquid crystal (LC) cells.
      
Diagnose Parameters of Plasma Induced by Femtosecond Laser Pulse in Quartz and Glasses
      
Electron plasma induced by a focused femtosecond pulse (130 fs, 800 nm) in quartz, fused silica, K9 glass, and Soda Lime glass was investigated by pump-probe technology.
      
更多          
  quartz powder
At the phase angles between 0.5° and 3.0°, the polarization for quartz powder with 10-μm particles is almost constant.
      
To study the inhibitory effect of oxymatrine (OM) on quartz-induced secretion of TNF-α in the fibroblast proliferation, a given amount of quartz powder and OM of different concentrations were put into the media of pure culture containing macrophages.
      
For example, fast saponification reactions as well as long lasting adsorption reactions of NaOH on quartz powder were recorded.
      
A single crystal of plagioclase was surrounded by quartz powder and water.
      
An investment based on hard plaster loaded with fine-grained quartz powder and good chemical removability was investigated.
      
更多          
  fused quartz
Adsorption isotherm of cationic polyelectrolyte, poly(styrene-co-dimethylaminopropylmaleimide), (molecular mass is 2 × 104) on the surface of fused quartz in aqueous 10-4 M KCl solution at pH 3 was measured by the method of capillary electrokinetics.
      
The Effect of Composition of Water-Ethanol Solutions on the Kinetics of Coagulation of Fused Quartz Suspensions
      
The effect of composition of water-ethanol solutions containing 0-96 vol % alcohol on the coagulation kinetics of dilute fused quartz suspensions is studied using flow ultramicroscopy technique.
      
Regularities of the Two-Layer Adsorption of Anionic Surfactant and Cationic Polyelectrolyte on the Fused Quartz Surface
      
Permittivities of Ftoroplast-4 fluoroplastic, fused quartz, single-crystal quartz, and other dielectrics measured in a frequency band of 10-70 GHz are presented.
      
更多          
  natural quartz
The adsorption of bovine serum albumin on silica of three different types, i.e., aerosil, macroporous silica gel, and ground natural quartz, was studied.
      
Studies into the modification of the composition of impurities of natural quartz particles in a dispersed plasma flow
      
Results are given of experimental investigations of the efficiency of removal of impurities (enrichment) from natural quartz particles during their interaction with an argon plasma jet of a stationary electric-arc plasma generator.
      
The contrast pattern observed in natural quartz crystals can mainly be attributed to defects produced during growing time preferable at edges orr-faces andz-faces.
      
Elastic strain and coloration pattern in natural quartz crystals
      
更多          
  其他


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为了说明高矽质矽砖在烧成中发生的物理化学变化对制品性质及破裂的影响,以五台(A)、都拉哈拉(B)、石门(C)、江密峰(D)产四种矽石为原料依高矽质矽砖的制造条件制成度样,分别按固定的升温速度烧至1000°,1250°,1250°,1400°,1430℃和在1430℃保温15小时6种温度条件下烧成,根据试样的窑业物理性质与相组成变化讨论了烧成期间影响制品性质和破裂的原因。结果指出: 1.高矽质矽砖的窑业物理性质不论原料的种类如何,均在1000℃以上的温度发生显著的变化。影响这些变化的主要原因是玻璃质的生成和石英的变态转变。2.高矽质矽砖中的石英变态转变过程,依原料种类有很大区别,石英→方石英的转变速度呈:C>A>B>D的顺序;方石英→鳞石英的转变速度呈B>A>C>D的顺序。3.高矽质矽砖在烧成中产生破裂的原因,是基质完全转变之后,石英→方石英转变在大颗粒石英进行时产生的应力状态引起的。4.为了避免烧成破裂,对于A,C两种原料可不加或少加添加物,烧成上火温度应控制在1350℃;B可不加添加物或只加MgO;D...

为了说明高矽质矽砖在烧成中发生的物理化学变化对制品性质及破裂的影响,以五台(A)、都拉哈拉(B)、石门(C)、江密峰(D)产四种矽石为原料依高矽质矽砖的制造条件制成度样,分别按固定的升温速度烧至1000°,1250°,1250°,1400°,1430℃和在1430℃保温15小时6种温度条件下烧成,根据试样的窑业物理性质与相组成变化讨论了烧成期间影响制品性质和破裂的原因。结果指出: 1.高矽质矽砖的窑业物理性质不论原料的种类如何,均在1000℃以上的温度发生显著的变化。影响这些变化的主要原因是玻璃质的生成和石英的变态转变。2.高矽质矽砖中的石英变态转变过程,依原料种类有很大区别,石英→方石英的转变速度呈:C>A>B>D的顺序;方石英→鳞石英的转变速度呈B>A>C>D的顺序。3.高矽质矽砖在烧成中产生破裂的原因,是基质完全转变之后,石英→方石英转变在大颗粒石英进行时产生的应力状态引起的。4.为了避免烧成破裂,对于A,C两种原料可不加或少加添加物,烧成上火温度应控制在1350℃;B可不加添加物或只加MgO;D需加入适量的添加物,烧成止火温度要略高于1350℃。

Die Hoch-und Tief-Umwandlungstemperatur des Cristobalits hngt von den Bedingungen seiner Entstehung und schwankt in einem Bereieh yon 180° bis 270℃. Um sich die Schwankungen der Umwandlungstemperatur von Cristbalit und seine Ursaehe zu erklren, haben wir den Einfluss der Faktoren, namentlich den Korngrssen der Rohstoffe, Entstehungstemperatur, Rohstoffsorten und den Mineralisatoren, auf die Umwandlungstemperatur untersucht. Folgende Regelmssigkeiten werden erhalten:1. Die Umwandlungstemperatur hngt von den Korngrssen...

Die Hoch-und Tief-Umwandlungstemperatur des Cristobalits hngt von den Bedingungen seiner Entstehung und schwankt in einem Bereieh yon 180° bis 270℃. Um sich die Schwankungen der Umwandlungstemperatur von Cristbalit und seine Ursaehe zu erklren, haben wir den Einfluss der Faktoren, namentlich den Korngrssen der Rohstoffe, Entstehungstemperatur, Rohstoffsorten und den Mineralisatoren, auf die Umwandlungstemperatur untersucht. Folgende Regelmssigkeiten werden erhalten:1. Die Umwandlungstemperatur hngt von den Korngrssen des auf Entstehungstemperatur unter 1600℃ gebildeten Cristobalits ab. Je feiner die Korngrse dee Bildungsstoffes, um so hher liegt die Umwandlungstemperatur. Gleichfulls die Korngrsse im Bereich von 67.5 his 90μ zeigt sich besonders heftig.2. Die Umwandlungstemperatur erht sich recht gleichmssig mit seiner Entstehungstemperatur nach der Gleichung: t_i=a+bt_f (dabei ist t_i—Umwandlungstemperatur; t_f—Entstehungstemperatur). Es wrid experimentell gefunden, dass die werte a,b abhngig von Rohstoffsorten sind. Fr armorphe Rohstoffe ist b grsser und a kleiner, whrend f kristallische Rohstoffe, ist es umgekehrt.3. Mit zunehmenden Kristallisationsgrad der Rohstoffe wird die Umwandlung zu hheren Temperaturen verschoben, nach der Ordnung: Kieselquarz>Kristalline quarzite>Hornstein>Amorphe Kieselsure.4. Die umwandelnde Kraft yon Mineralisatoren auf die Quarzumwandlung ist strker, je hher die Umwandlungstemperaturen liegen. Es erhht sich folgendermassen: Li_2CO_3>Na_2CO_3>Na_2WO_4>FeO>CaO.

本文探討方石英高低温型轉变温度的变化規律及其原因。就形成方石英的原料颗粒大小、燒成温度、原料类型和矿化剂种类等因素对轉变温度的影响进行研究。結果表明: 1.原料的顆粒大小对1600°以下温度形成的方石英轉变温度有影响,顆粒愈小,轉变温度愈向高温移动,这种傾向对67.5—90μ范圍内的顆粒特別明显。 2.燒成温度以直綫关系影响轉变温度向高温移动,以方程式t_i=a+bt_f(t_i—轉变温度;t_f—燒成温度)表示此关系时,a,b的值依原料类型不同,非晶質原料的—a值小,b值大;結晶質則相反。 3.原料类型依結晶度的高低影响轉变温度移动,結晶度愈高的原料形成的方石英轉变温度愈高,即按:脉石英>石英岩>燧石岩>非晶質硅酸的次序温度升高。 4.矿化剂作用力的强弱对方石英的高低温型轉变温度亦有影响,矿化作用愈强的矿化剂愈影响所形成的方石英轉变温度向高温移动,其次序为:Li_2CO_3>Na_2CO_3>FeO>CaO。

The corrosive action of neutral and reducing gas streams containing HF at high temperatures on fireclay and high-alumina refractories has been investigated. The influences of HF eoncontration, temperature variation and the water vapor content in the gas stream etc. have been eritically studied. With the aid of thermodynamie analyses of the various reactions between HF and the mineral constituents of the alumino-silicate refractories, it has been found possible to satisfactorily explain the mechahism of the corrosive...

The corrosive action of neutral and reducing gas streams containing HF at high temperatures on fireclay and high-alumina refractories has been investigated. The influences of HF eoncontration, temperature variation and the water vapor content in the gas stream etc. have been eritically studied. With the aid of thermodynamie analyses of the various reactions between HF and the mineral constituents of the alumino-silicate refractories, it has been found possible to satisfactorily explain the mechahism of the corrosive actions.Within the temperature range 500—900℃, it has been found that an increase in temperature is always unfavorable to the corrosive reactions. At temperatures above 700℃, the action of neutral gas streams containing 0.1% HF is very mild on both kinds of refractories. For gas streams containing HF up to 1%, mullite is murh more resistant to attack than eristobalite, especially for temperatures over 700℃. When the HF concentration is increased to 6%, mullite is, however,also severely attacked in the above mentioned temperature range. Gas streams containing water vapor is helpful to minimize the corrosive action of HF gas. Lastly, it is interesting to note that a reducing gas stream, similar in composition to that of blast furnace gas, further supresses the corrosive action of HF in low concentration (0.1%), due probably to some sort of carbon protective film formed on the surfaces of refractory sample grains.

本文研究了含HF的中性与还原性气流在高温下对于粘土砖与高铝氧砖的侵蚀作用。探讨了HF的浓度变化、温度变化及气流中的水蒸气含量变化等因素,对于侵蚀作用的影响。借助于HF气体与矽酸铝耐火材料各个矿物组分间的化学反应的热力学分析,可以较满意地阐明侵蚀作用的机理。 在500~900℃的温度范围内,提高温度不利于侵蚀作用的进行。含HF0.1%的气体,在700℃以上对两种耐火材料的侵蚀均甚轻微。当气流中HF的浓度低于1%时,莫来石抵抗侵蚀的能力,特别在700℃以上,远较方石英为优。当HF的浓度到达6%时,莫来石在上述温度范围内也被严重地侵蚀了。气流中含有水蒸气可以减轻HF的侵蚀作用,类似高炉气的还原性气氛更可使低浓度的HF气体的侵蚀作用大为减弱。

 
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