共搜索到1397条信息，每页显示10条信息，共140页。用时：0小时0分0秒740毫秒
Effect of rare earth cerium and impurity tin on the hot ductility of a Cr-Mo low alloy steel宋申华,徐野威,陈贤淼,姜雪Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science... addition of rare earth Ce could be an effective method of suppressing the detrimental effect of impurity elements on the hot ductility of a Cr-Mo low alloy steel.关键词:......
Effect of rare earth cerium and impurity tin on the hot ductility of a Cr-Mo low alloy steel宋申华,徐野威,陈贤淼,姜雪Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science... addition of rare earth Ce could be an effective method of suppressing the detrimental effect of impurity elements on the hot ductility of a Cr-Mo low alloy steel.关键词:......
......
Quenching Study on Iron Impurity in Eu2+, Dy3+ Doped Strontium Aluminate Phosphor Prepared by Nano-Coating Process杨雪峰,宁桂玲,刘杰,潘文,林源摘 要:A series of long... that the precursor particles had nanometer size distribution. The optical quenching of iron impurity on the phosphor powders were investigated by X-Ray powder Diffraction (XRD) and photoluminescence......
. The results show that the interdiffusion coefficients depend strongly on the concentration. These coefficients are compared with the impurity diffusion coefficients which are determined by Vignes-Birchenall... diffusion couple; interdiffusion; impurity diffusion; activation energy; frequency factor ......
), which is strong acid-resistance to HF. Unlike HF,the chemical stripping-off effect of the particle size of silicon powder made by aqua regia decreases obviously and the impurity phases easily expose at the grain boundaries. The loss rates of Si powder after two acids are less than 3.5%. Key words: metallurgical silicon; acid leaching; purification process; impurity phases 太阳能光伏发电产业因其取之不尽,用之不竭,清洁环保和安......
(1) (2) (3) (4) (5) 2.2 槽电压对电脱氧的影响 在温度为900 ℃时阴极的循环伏安曲线如图5所示.由图5可知:在槽电压低于1.5 V时,未出现还原峰,说明阴极未发生电脱氧反应；当槽电压高于1.5 V时,开始出现还原峰,但不明显,这是导致电还原速率慢,电流低的原因.实际开始发生还原的槽电压应该高于1.5 V. 图5 阴极的循环伏安曲线图 Fig. 5 Cyclic voltampere of cathode 在温度为900 ℃,电解时间为15 h,槽电压分别为1.2,1.6,2.0和2.8 V条件下的阴极产物SEM形貌如图6所示,对应的元素分析如表3所示.由表3可知:当槽......
(5): 30-34. [3] 鲁道荣. 杂质在铜电解液精炼中的电化学行为[J]. 有色金属, 2002, 54(4): 51-52. LU Dao-rong. Electrochemical behaviors of impurity ions in copper electrorefining[J]. Nonferrous Metals, 2002, 54(4): 51-52. [4] 崔 涛... electrowinning[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(12): 2425-2430. [27] 张晓瑜. 铜电解精炼过程中砷锑铋杂质分布及其脱除研究[D]. 西安: 西安建筑科技大学, 2014. ZHANG Xiao-yu. Impurity distribution and control study in copper......
Trans. Nonferrous Met. Soc. China 27(2017) 1411-1416 Impurity distribution in distillate of terbium metal during vacuum distillation purification Xiao-wei ZHANG, Rui-ying MIAO, Dao-gao WU, Qiong ZHU... experiment and theoretical analysis. It is found that Ti impurity in distilled terbium is 220 mg/kg in the initial stage of the distillation purification, increases slowly in the middle stage, and increases......
......
