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轴向温度梯度
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  axial temperature gradient
     Rational technical parameters were designed in the crystal growth process, which are: the axial temperature gradient of 0.8℃/mm in solid-liquid interface, the radial temperature gradient of 0.3℃/mm, the growth speed of 2~4mm/h, the rotate speed of 40~45 r/min .
     通过多次实验设计了合理的工艺参数:固液界面的轴向温度梯度为0.8℃/mm,径向温度梯度一般不大于0.3℃/mm,拉速为2~4mm/h,转速为40~45r/min。
     Optimum conditions of the Czochralski-pulling procedure are that the pulling speed is 0. 5-4 mm/h, the rotation rate 10-18r/ min, the cooling speed 18 ℃/h and the axial temperature gradient in solid-liquid interface 0. 7-1 ℃/mm.
     讨论了钨酸钇钠晶体的生长工艺,给出晶体生长的最佳工艺参数:拉速为0.5~4 mm/h,转速为10-18 r/min,冷却速率为18℃/h,最佳的液面轴向温度梯度为0.7~1℃/mm。
短句来源
     The best condition of Nd:NBW crystal for growth by Czochralski method is resulted in the following: 7-10 /cm for axial temperature gradient along the centre of solid-fluid interface, 0.2-0.5mm/h for growth rate, 1-4rpm for crystal rotation rate, 15 /h for crystal cooling rate.
     Nd:NBW晶体生长实验采用Czochralski(简称:Cz法)工艺,研究了Nd:NBW晶体的最佳生长工艺,得出了其最佳生长条件为:固-液界面中心的轴向温度梯度7—10℃/cm,径向温度梯度越小越好、生长速率0.2—0.5mm/h、晶体转速1—4rpm、冷却速率15℃/h。
短句来源
     The condition of the Cz-pulling procedure was described in details, which were: the pulling speed 1~2mm/h, the rotation rate 10~18r/min ,the cooling speed 18℃/h and the axial temperature gradient of in solid-liquid interface 0 7~1℃/mm.
     研究了钨酸钇钠晶体的生长工艺 ,给出晶体生长的最佳工艺参数为拉速 1 - 2mm/h ,转速为 1 0 - 1 8r/min ,冷却速率为 1 8℃ /h ,轴向温度梯度为液面上 0 7— 1℃ /mm。
短句来源
     Effect of Axial Temperature Gradient on the Egression of Liquid Phases in Melting Growth Process of Bulk YBCO
     轴向温度梯度对熔融法YBCO液相损失的影响
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  axial temperature difference
     The analysis results prove that the radial temperature difference or the axial temperature difference caused by the cooling water is higher than that caused by hot oil, therefore the key point of the design of preventing deformation of coke drum lies in how to control the thermal stress during cooling operation.
     由计算分析首先证明冷焦水在塔壁上造成的径向温差和轴向温度梯度均明显大于进油过程 ,确定了焦炭塔的防变形设计重点应该在如何控制冷焦阶段的热应力。
短句来源
     So the radial temperature difference or the axial temperature difference caused by the cooling water is more than each of the difference by the hot oil, so the key point to prevent the deformation is that how to control the thermal stress during cooling operation.
     根据冷焦水在塔壁上造成的径向温差和轴向温度梯度均明显地大于进油过程 ,确定了焦炭塔的防变形重点在如何控制冷焦阶段的热应力。
短句来源
  “轴向温度梯度”译为未确定词的双语例句
     Optimal parameters for cyrstal growth are:temperature gradients in axial direction is 28—35℃/cm,rotation speed is 5—10r/min,and pulling rate of KLN crystal depend on composition ration of growth raw materials.
     选用的轴向温度梯度为28 ~35 ℃/cm ,晶体的旋转速度为5 ~10r/min ; 晶体的生长速度与 K L N 的生长原料的成分有关。
短句来源
     A remaking scheme is put forward in this article to reduce the longitudinal heat stresses that frequently and alternately arise in the weld in large value, with reducing appropriately the binding rigid and the longitudinal temperature gradient of the structure,according to the results of measuring the stresses and the temperatures in the weld region and the analysis of them.
     本文根椐焊缝区域温度、应力的测试结果,并在对其变化规律分析的基础上,提出了为降低频繁交替出现的高幅值的轴向应力,适当降低结构的约束刚度和轴向温度梯度的改造方案。
短句来源
     Using simple boundary condition, the temperature gradient along the z direction is a constant while the generative internal heat is not considered.
     仅从顶表面耗散热量的情况下,不考虑对辐射的吸收,晶体中轴向温度梯度为恒值。
短句来源
     Using same boundary condition, the temperature gradient along the z direction is gradually increasing to a constant from the solid liquid interface to the top of crystal while the internal heat generative is considered.
     考虑对辐射的吸收,固液界面处轴向温度梯度最小,向上逐渐增加,最后趋于恒值。
短句来源
     It indicates that appropriate temperature gradient (both axial and radial), lower pulling rate and lower seed rotation rate are cruxes of Φ 200 mm silicon single crystal growth.
     合理的轴向温度梯度和径向温度梯度、低拉速、低晶转及规范的拉晶工艺是拉制大直径单晶的关键。
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  axial temperature gradient
Third at higher temperatures an additional axial temperature gradient up to 0.05 K/cm was applied to enhance peak symmetry.
      
In a partially filled and constantly spinning container in zerogravity condition there arises under the action of an axial temperature gradient a thermo-capillary convection.
      
In a viscous liquid column thermocapillary convection arises under the action of an axial temperature gradient.
      
The form of the interface was controlled by the He and H2O content in the reducing atmosphere composed mainly of Ar and H2 as well as by axial temperature gradient above the melt level.
      
We have studied the electromigration (j = 5.7 × 105 A/m2) of Ag-Te melt inclusions in single-crystal tellurium at an axial temperature gradient dT/dx = 1.5 × 103 K/m.
      
更多          
  axial temperature difference
The Marangoni number was estimated to range from 3000 to 14000, based on the measured axial temperature difference.
      


A method for calculating the falling rate of the melt level in a crucible during crystal growth by Czochralski technique is proposed. The actual growing rate of the crystal can be accurately calculated with the calculation results. The crystal growth history can be studied and the transient axial temperature gradient of the melt in the crucible can be estimated.

本文首先给出用恰克拉斯基法生长晶体时计算坩埚液面下降速率的方法.接着应用该方法的计算结果,准确地求出了晶体的实际生长速率和对晶体的生长史进行了研究.同时,对坩埚熔体的动态轴向温度梯度进行了估算.

A model has been described in this paper for the temperature distribution in a fixed bed reactor. The finite element method is used for its digital computation.

目前,研究固定床接触反应器的热量传递问题,仍广泛采用Coberly提出的"有效传递"模型.该模型略去了床层轴向温度梯度的影响.但是,种简化只是在一定条件下才是允许的.本文将就更一般的模型给出有限元算法.

In this paper, factors affecting cracking of the large-sized BaF_2 single crystals in the growth process are examined. Allowable maximun axial temperature gradient, rate of cooling as well as the maximun resultant strain due to the thermal stress during the growth of the above crystals are also discussed.Perfect crystals of 100mm in diameter, free ef cracks were obtained by improving the temperature field and establishing the optimum growth process for Bridgman-Stock-barger method.

本文指出了大尺寸(φ100mm)BaF_2单晶生长过程中的开裂因素,分析了大尺寸BaF_2单晶生长时能允许的最大轴向温度梯度,降温速率以及由于热应力引起的最大合成应变。相应地改善了温场,确定了最佳晶体生长工艺,采用坩埚下降法生长出了无开裂的φ100mm的完整晶体。

 
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