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合成石英
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     Experimental studies on isotope fractionation for oxygen between the mineral pair of quartz andcassiterite synthesized from silica gel or/and amorphous SnO_2 and the cassiterite synthesized from SnO_2and water were conducted in water solution respectively at temperature ranges 400-500℃ and250-370±-500℃, under a pressure range of 0.3-0.6 Kbar, with water salinty of 0-15wt%. Temperature variations of the isotope fractionation factor for oxygen between quartz-cassiterite and water we obtainedfrom our studies are expressed by following equations:1.1000 In a_QC_3=3.11(10~6T~(-2))+1.63 (400℃-500℃)2.1000 lna_C_5-H_3O~2=2.60(10~6T~(-2))-9.91 (250℃-37℃±)3.1000 lnaC_3-H_3O~2=0.20(10~6T_-2)-4.34 (370℃±-500℃)
     本文在400~500℃及250~370℃温度范围内,盐度为0~15wt%,压力约0.3~0.6kbar条件下,分别在水溶液中完成了由硅胶及非晶质SnO_2合成石英-锡石矿物对以及由非晶质SnO_2等合成的锡石与水之间氧同位素分馏的实验研究,获得了石英-锡石-水体系氧同位素分馏作用系数与温度的关系方程:1000lna_(石英-锡石)=3.11×10~6T~(-2)+1.63(400~500℃),1000lna_(石锡-水)=2.60×10~6T~(-2)-9.91(250~370℃±),1000lna_(锡石-水)=0.20×10~6T~(-2)-4.34(370±~500℃).
短句来源
     This paper gives a brief analysis about these factors at first, and then, reviews the new technologies to overcome them, including using synthetic silica tube, various hybrid processes and new heating technologies to substitute for H 2 O 2 flame .
     本文首先简要分析了这些限制因素,然后综述克服这些限制因素的新技术,其中包括使用合成石英管、各种混合工艺以及可取代氢氧焰的新加热技术。
短句来源
  相似匹配句对
     N,N,N?
     合成了 N,N,N?
短句来源
     Coumarin fluorescent dyes such as C.
     合成了C.
短句来源
     Synthetizing Silica Tubes for Optical Fiber at Low Temperature
     低温合成光纤用石英
短句来源
     Preparation of titania-quartz composite via microwave irradiation
     石英复合钛白粉的微波合成
短句来源
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  synthetic quartz
Small-angle neutron scattering study of radiation-induced defects in synthetic quartz
      
Nature of radiation defects in synthetic quartz according to the small-angle neutron scattering data
      
Small-angle neutron scattering study of radiation defects in synthetic quartz
      
The superatomic structure of synthetic quartz single crystals with dislocation densities ρ = 54 and 570 cm-2 was studied in the initial state and after irradiation with fast neutrons with energies En >amp;gt; 0.1 MeV in a WWRM reactor (St.
      
The results of combined application of the neutron diffraction and acoustic emission methods for investigation of the physical properties of synthetic quartz and natural quartzite in a temperature range of α-β transition are given.
      
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The influence of principal stress orientation on the mobility of the quartz crystal slip system has been studied by high temperature and high pressure deformation test, in which the angle "φ" between the "c" axis of quartz crystal and the principal stress "σ_1" orientation is variable.The research results show that all the quartz crystal sllp systems are inactive when φ=0° but become active when φ=90°. The sllp systems of quartz crystals become more active when φ=45°. That means temperature and pressure are...

The influence of principal stress orientation on the mobility of the quartz crystal slip system has been studied by high temperature and high pressure deformation test, in which the angle "φ" between the "c" axis of quartz crystal and the principal stress "σ_1" orientation is variable.The research results show that all the quartz crystal sllp systems are inactive when φ=0° but become active when φ=90°. The sllp systems of quartz crystals become more active when φ=45°. That means temperature and pressure are necessary preconditions for slip system mobility of quartz crystals. But they will not be active unless the orientation of principal stress is suitable for those slip systems.

本文通过一组c轴与主应力(σ_1)夹角ψ不同的人工合成石英单晶体定向样品的实验变形,研究了主应力取向对石英晶体滑移系开动的影响。研究表明,主应力取向对石英晶体滑移系的可动性有明显影响:在450—650℃温度,300—500MPa围压条件下,当ψ=0°时,石英滑移系不开动;ψ=90°时,(001)[100]、(011)[111]等底面或锥面的滑移系有微小动作;ψ=45°时,石英晶体滑移系可动性最好。在这种温度压力条件下,石英晶体的位错沿开动的滑移系运动是石英产生塑性变形的直接原因。

Experimental studies on isotope fractionation for oxygen between the mineral pair of quartz andcassiterite synthesized from silica gel or/and amorphous SnO_2 and the cassiterite synthesized from SnO_2and water were conducted in water solution respectively at temperature ranges 400-500℃ and250-370±-500℃, under a pressure range of 0.3-0.6 Kbar, with water salinty of 0-15wt%. Temperature variations of the isotope fractionation factor for oxygen between quartz-cassiterite and water we obtainedfrom our studies are...

Experimental studies on isotope fractionation for oxygen between the mineral pair of quartz andcassiterite synthesized from silica gel or/and amorphous SnO_2 and the cassiterite synthesized from SnO_2and water were conducted in water solution respectively at temperature ranges 400-500℃ and250-370±-500℃, under a pressure range of 0.3-0.6 Kbar, with water salinty of 0-15wt%. Temperature variations of the isotope fractionation factor for oxygen between quartz-cassiterite and water we obtainedfrom our studies are expressed by following equations:1.1000 In a_QC_3=3.11(10~6T~(-2))+1.63 (400℃-500℃)2.1000 lna_C_5-H_3O~2=2.60(10~6T~(-2))-9.91 (250℃-37℃±)3.1000 lnaC_3-H_3O~2=0.20(10~6T_-2)-4.34 (370℃±-500℃)

本文在400~500℃及250~370℃温度范围内,盐度为0~15wt%,压力约0.3~0.6kbar条件下,分别在水溶液中完成了由硅胶及非晶质SnO_2合成石英-锡石矿物对以及由非晶质SnO_2等合成的锡石与水之间氧同位素分馏的实验研究,获得了石英-锡石-水体系氧同位素分馏作用系数与温度的关系方程:1000lna_(石英-锡石)=3.11×10~6T~(-2)+1.63(400~500℃),1000lna_(石锡-水)=2.60×10~6T~(-2)-9.91(250~370℃±),1000lna_(锡石-水)=0.20×10~6T~(-2)-4.34(370±~500℃).

Oxygen isotope fractionatin accompanied by hydrothermal crystallization of quartz from silica gel at 180℃ to 550℃ and under salinities of 0, 5,25 and 40 wt. % has been studied to get some knowledge about the effect of the salinity, Ai value, reaction mechanism and temperature on isdtope fractination. The data obtained suggest that oxygen isotope equilibrium between ailica gel and pure water at low temperature cannot be established. Factors affecting the exchange rate between oxygen—bearing phases include the...

Oxygen isotope fractionatin accompanied by hydrothermal crystallization of quartz from silica gel at 180℃ to 550℃ and under salinities of 0, 5,25 and 40 wt. % has been studied to get some knowledge about the effect of the salinity, Ai value, reaction mechanism and temperature on isdtope fractination. The data obtained suggest that oxygen isotope equilibrium between ailica gel and pure water at low temperature cannot be established. Factors affecting the exchange rate between oxygen—bearing phases include the salinity of solution, △i value and temperature. The authdrs do not agree with the conclusion on salt isotope effect put forward by Truesdell (1974).The temperature dependence of oxygen isotope fractionation between quartz and water at 180℃ to 550℃ and salinities of 5, 25 and 40 wt. %are as follows: 10001nα_(Q-H_2O)=3.306×10~6T~(-2)-2.71.

温度为180—550℃,盐度(wt.%)分别为0、5、25和40条件下,在高压釜内完成了由硅胶合成石英的氧同位素分馏作用实验研究,目的是了解:①盐同位素效应;②△t值对同位素分馏的影响;③温度与同位素分馏系数的关系。研究资料表明:低温条件下矿物和纯水之间同位素平衡作用不可能发生;影响含氧矿物(初)之间氧同位素平衡速率的因素包括盐度、△t值大小和温度等;我们的研究还表明,盐度对同位素分馏作用同系数无影响,即不存在所谓的“同位素盐效应”。在180—550℃温度范围内,不同盐度条件下获得的石英-水氧同位素分馏实验方程为:10001nα_(石英-水)=3.306×10~5T~(-2)—2.71。

 
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