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1.
Using the CALPHAD (Calculation of Phase Diagram) technique, the DyCl3-MCl (M = Na, K, Rb, Cs) systems were optimized and calculated. The modified quasi-chemical model in the pair approximation for short-range ordering was used to describe the Gibbs energies of the liquid phase in these systems. From the measured phase diagram data and experimental thermodynamic properties, a series of thermodynamic functions were optimized base on an interactive computer-assisted analysis. The optimized parameters and the experimental data were thermodynamically self-consistent. The optimized results were discussed. 相似文献
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The green phosphor for white LED, Ca8Mg(SiO4)4Cl2∶Eu2+, Mn2+, was synthesized by high temperature solid state reaction under reducing atmosphere. During the process of the phosphor prepared, the excess CaCl2 can improve the intensity of emission. The experimental results indicate that there is an effective energy transfer from Eu2+ to Mn2+in Ca8Mg(SiO4)4Cl2 host. This kind of energy transfer may be due to resonance transfer, and this energy transfer is limited. 相似文献
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The green phosphor for white LED, Ca8Mg(SiO4)4C12:Eu^2 , Mn^2 , was synthesized by high temperature solid state reaction under reducing atmosphere. During the process of the phosphor prepared, the excess CaC12 can improve the intensity of emission. The experimental results indicate that there is an effective energy transfer from Eu^2 to Mn^2 in Ca8Mg(SiO4)4Cl2 host. This kind of energy transfer may be due to resonance transfer, and this energy transfer is limited 相似文献
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The Gibbs energies of liquid phases in the LaI3-MI (M=Na, K, Cs) systems were described by the modified quasi-chemical model. From the measured phase equilibrium data of these binary systems, a set of thermodynamic functions were optimized by using the CAL-PHAD technique. The enthalpy of mixing and the interaction parameter of the liquid phase were predicted from known data for the LaI3-MI systems. 相似文献
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对ZL101熔体分别采用熔剂处理、旋转喷吹氩气处理,检测处理前后的含氢量。将未净化及采用两种不同工艺处理的ZL101熔体分别浇注砂型、金属型铸件,对比两种处理方法对铸件针孔度的影响。结果表明,旋转喷吹氩气的除气效果明显优于熔剂处理;旋转喷吹氩气后,不论是砂型还是金属型,铸件针孔度都可达到一级。 相似文献
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杭州机床集团有限公司是一家面向全球的综合磨床供应服务商.成立于2001年12月28日.公司生产的平面磨床、成形磨床产销量位居全国榜首,被商务部授予中国最具市场竞争力品牌,是中国机床行业十强和中国机械工业500强企业.是卧轴矩台、 相似文献
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施工项目管理控制是施工企业管理控制的基础,本文中提出了加强项目管理控制的措施,并进行了阐述,旨在探讨和研究延伸建设项目管理控制的途径。 相似文献
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当报价低于企业成本时,按法律规定不得中标,即使侥幸中标.也等于负经济效益经营,这是相互矛盾的两个方面。当前投标报价低于成本价的确定与企业如何防范值得探讨。 相似文献