共搜索到14363条信息,每页显示10条信息,共1437页。用时:0小时0分0秒359毫秒
结晶助剂CGM--对晶种分解的作用刘康,何强重庆市南川区先锋氧化铝公司摘 要:铝酸钠溶液的晶种分解是拜耳法生产氧化铝的关键工序之一,它不仅影响产品氧化铝的数量和质量,而且直接影响循环效率及其他工序.本文介绍了在晶种分解过程中加入表面活性剂--CGM结晶助剂--可有效地改善产品的粒度,强度,提高分解率,同时减少分解槽液面上的泡沫.关键词:铝酸钠溶液;强化分解;砂状氧化铝;CGM(Crystal Growth Modifier);......
......
(Ⅰ represents combination-A; Ⅱ represents combination-B; Ⅲ represents combination-C; Ⅳ represents combination-D; Ⅴ represents single growth unit) 4 Conclusions 1) The combination mode of the crystal growth... of Crystal Growth , 2001, 233(4): 567-582. [10] LI Jie. Sdudy on the Structure Characteristics and Decomposition Mechanism of Supersaturated Sodium Aluminate Solution[D]. Changsha: Central South......
Introduction The crystal properties were determined by grain morphology and lattice orientation in directional solidification[1]. In fact the grain growth is a complex dynamic 3-D process affected... was determined by residual resistance ratio. Although the single crystal grew up through grains competition, the nucleation and growth process were not discussed in his work. Gandin[10] compared......
Preparation of anhydrous lanthanum bromide for scintillation crystal growth张彤,李红卫,赵春雷,余金秋,胡运生,崔磊,何华强摘 要:This paper reported an efficient and economical method for preparation of anhydrous LaBr3 for scintillation crystal growth. High purity anhydrous LaBr3 powders in large quantities were successfully obtained by stepped dehydration of LaBr3·7H2O using......
Preparation of anhydrous lanthanum bromide for scintillation crystal growth张彤,李红卫,赵春雷,余金秋,胡运生,崔磊,何华强摘 要:This paper reported an efficient and economical method for preparation of anhydrous LaBr3 for scintillation crystal growth. High purity anhydrous LaBr3 powders in large quantities were successfully obtained by stepped dehydration of LaBr3·7H2O using......
and approaches to [100] gradually during the growth process. Key words: high purity aluminum; competitive growth; directional growth; lattice orientation 1 Introduction The crystal properties are determined... with a preferred orientation or crystal selection method was used[2-4]. However, in case that these technologies cannot be used, the competitive growth of grains can be utilized to form single crystal......
Abstract: Based on the cellular automaton (CA) method, a numerical model was developed to simulate the dendritic growth of magnesium alloy with HCP crystal structure. The growth kinetics was calculated...-SANCHEZ and STEFANESCU for the dendritic growth of cubic crystal metals during solidification, modeling of dendritic growth of magnesium alloy with different growth orientations was achieved. Simulation......
Growth and Characteristic of YbAl3(BO3)4 Crystal李静,赵洪阳,王继扬,梁曦敏,王绪平摘 要:<正>YbAl3(BO3)4 crystal of good optical quality was grown by the flux method. The structure of YbAl3(BO3)4 crystal was determined by single-crystal X-ray diffraction. The experiment shows that YbAl3(BO3)4 belongs to the double bo-rates with a trigonal structure. The space group......
J. Cent. South Univ. Technol. (2011) 18: 6-15 DOI: 10.1007/s11771-011-0651-4 Morphology and growth of porous anodic oxide films on Ti-10V-2Fe-3Al in neutral tartrate solution YI Jun-lan(易俊兰... those in the inner layer vary significantly with sputtering depth. The thicknesses of the intermediate layer and the inner layer are 2 μm and 1.0- 1.5 μm, respectively. Moreover, the growth......