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Germany 2017 Abstract: Ytterbia and erbia dual-doped zirconia (ZrO2: Yb3+, Er3+) nanophosphors were successfully synthesized by high-temperature fuel combustion at 1000 °C for 2 h. The effects... that the dual-doped Yb3+ and Er3+ ions result in the non-radiative relaxation, energy migration, and cross relaxation. Key words: nanostructure; luminescence; upconversion; zirconia 1 Introduction In recent......
Effect of particle size distribution on properties of zirconia ceramic mould for TiAl investment castingCHEN Yan-fei, XIAO Shu-long, TIAN Jing, XU Li-juan, CHEN Yu-yong(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)Abstract:The effect of particle size distributions (PSDs) on the properties of zirconia ceramic mould for TiAl investment casting......
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pH值降低及电导率增加幅度较小,起弧电压,电解液温度较低,膜层生长速率较快,其厚度增长速率约为2.9 μm/min.原位锆溶胶电解液制备的膜层表面呈多孔网状结构,内外膜层结合紧密,膜层较厚,可达85 μm；外加锆溶胶电解液生成膜层表面有火山状沉积物,膜层疏松；微弧氧化膜主要由γ-Al2O3和t-ZrO2相组成.关键词:铝合金；锆溶胶；微弧氧化Influence of zirconia sol... electrolyte with in-situ and additional zirconia sol. The effects of zirconia sol on the microarc oxidation process were investigated. The variations of voltage and electrolyte parameters, the growth process......
; 文献标识码: A Preparation of spherical zirconia and Ni-coated zirconia composite... 450041, China) Abstract: The spherical zirconia and Ni-coated zirconia composite powders were synthesized by the chemical precipitation method. The processing factors, such as adding rate and manner......
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glass-ceramic bond coating, 8% (mass fraction) yttria stabilized zirconia (8YSZ) top coating and nimonic alloy substrate were evaluated. The thermal diffusivity and thermal conductivity of the TBC... words: glass-ceramic coating; thermal barrier coating; thermal properties; yttria stabilized zirconia 1 Introduction Thermal barrier coatings (TBCs) are widely applied to protect the hot-section......
Preparation and analysis of zirconia oxygen sensors LUO Zhi-an(罗志安), XIAO Jian-zhong(肖建中), XIA Feng(夏 风) State Key Laboratory of Plastic Forming Simulation and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China Received 12 April 2006; accepted 25 April 2006 Abstract: Thimble zirconia oxygen sensors were prepared with yttria stabilized zirconia(YSZ......
)0.37-O6.43 glass. The first crystallization reaction occurs at 1223-1273K and the tetragonal zirconia oxide forms, the crystallization activation energy is 518-538kJ/mol. The second crystallization reaction occurs at 1423-1473K. The main phases precipitated are mullite and cristobalite, the crystallization activation energy is 522-545kJ/mol. The zirconia oxide existence can decrease the crystallization......
; Abstract: Alumina/zirconia composites were synthesized by wet-milling... and small grain size are successfully developed at relatively low temperatures through this technique. Key words: bioceramic; alumina; zirconia, mechanical wet-milling, sintering ......
