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Low Temperature Luminescence Properties of Tm3+ Doped Aluminate Phosphor Zhuang Weidong1,Huang Xiaowei1,Xia Tian1,Teng Xiaoming1,Zhao Chunlei1,Cui Xiangzhong1 (1.National Engineering Research... and UV emission spectra at 20, 50 and 100 K show that the low temperature luminescence intensities become weak gradually with the increasing of the temperature under 147 and 254 nm excitation......
NUMERICAL INVESTIGATION OF STRAIGHT-LINE LASER FORMING UNDER THE TEMPERATURE GRADIENT MECHANISM Z.Q. Yao1,J. Hu1,H. Shen1,Y.J. Shi1 (1.School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China) Abstract:Laser forming is a new flexible and dieless forming technique. To achieve the high accuracy forming, the temperature gradient mechanism (TGM) is studied......
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High temperature performance of arc-sprayed aluminum bronze coatings for steel ZHANG Zhong-li(张忠礼)1, LI De-yuan(李德元)1, WANG Shui-yong(王水勇)2 1. School of Materials Science and Engineering... April 2006 Abstract: The high-temperature oxidation behavior of arc-sprayed aluminum bronze coatings on steel substrate was studied during isothermal exposures in air at 900 ℃. The surface......
High Temperature Chemical Reaction of La2O3 in H3BO3-C System Xu Jingyu1,Wu Wenyuan1,Tu Ganfeng1,Peng Kewu1 (1.School of Material and Metallurgy, Northeastern University, Shenyang 110004, China) Abstract:The high temperature chemical reaction process of La2O3 in H3BO3-C system was studied by means of XRD and TG-DTA. The results showed that dehydration reaction of H3BO3 occurred......
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Simulation on temperature field of TIG welding of copper without preheating LEI Yu-cheng(雷玉成), YU Wen-xia(郁雯霞), LI Cai-hui(李彩辉), CHENG Xiao-nong(程晓农) School of Materials Science and Engineering... of tungsten inert gas(TIG), a model of non-steady three-dimensional temperature field for red copper’s TIG welding with a locomotive arc was established. The temperature field of welding pool was calculated......
溶胶-凝胶法制备的Zn1-xCoxO晶体粉末的结构和磁性行为高茜1,孙本哲1,祁阳1,齐连仲1(1.辽宁省沈阳市东北大学理学院)摘 要:利用溶胶凝胶法制备了Zn1-xCoxO(x=0.01-0.05,原子分数)纳米晶体粉末,利用XRD,TEM和SEM对其结构,结晶状态,形貌和成分进行了表征和分析.结果表明,所有样品均由尺寸约为100 nm的晶体颗粒组成,Zn1-xCoxO的晶格常数均比未掺杂的ZnO晶格常数小,且保持了单一纤锌矿ZnO结构,实际掺杂浓度与名义掺杂浓度基本匹配.振动样品磁强计测试结果显示,所有样品......