【摘 要】
：
Single-phaseα-CaSO4·0.5H2O whiskers were directly synthesized from waste Ca(NO3)2 solution using a hydro-thermal method, and HNO3 was synchronously regenerate
【机 构】
：
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 1
论文部分内容阅读
Single-phaseα-CaSO4·0.5H2O whiskers were directly synthesized from waste Ca(NO3)2 solution using a hydro-thermal method, and HNO3 was synchronously regenerated. The effects of reaction temperature and Ca2+con-centration on the phase composition and morphology of products were determined by X-ray diffraction and optical microscopy. On the basis of the experimental results, the formation diagram ofα-CaSO4·0.5H2O was plot-ted within the range of 5–35 g·L?1 Ca2+and 115 ℃–150 ℃. In addition, the conditions of the direct synthesis ofα-CaSO4·0.5H2O were determined. Well-crystallized, single-phaseα-CaSO4·0.5H2O whiskers with high aspect ratios (length, 1785μm;diameter, 10.63μm;aspect ratio, 168) and HNO3 (70.25 g·L?1) were obtained at the op-timal conditions of 25 g·L?1 Ca2+and 125 ℃.
其他文献
Modification of perlite using nano-magnetic iron oxide was implemented to produce nano-magneticFe3O4-coated perlite composite (Fe3O4/Perlite). The prepared comp
The cheap manganese sand was first modified by H2O2 and was further creatively utilized as Ni-based catalyst support. In order to enhance the catalytic performa
ＺＬ－Ⅱ型污染源自动监示系统是适应国内目前环境监督管理工作新的需要，最新推出的一种新型环境监理自动监示系统。本系统与有关监控仪器、设备配用，能将水、大气、噪声等各种治理设
The formation of controllable size and dripping frequency in electrohydrodynamic (EHD) atomization with elec-tric periodic dripping regime are of much interest
This work is devoted to the study of the inhibition of corrosion of mild steel (MS) in molar hydrochloric acid (1 mol?L-1 HCl) by two named quinoxaline derivati
大型电力及自动化公司ABB已经开发出一种有效的输电方式,这种技术可以将广泛分布的太阳能电池板、风力涡轮机和其他可再生能源进行高效的传输.这项新技术是一种可以用于高压
2017年11月2日到5日，第69届“德国纽伦堡国际发明展”在德国纽伦堡国际会展中心举行。来自31个国家及地区的800多项发明作品参加了展出，其中中国代表团共展出了115件从国内各省市筛选出来的优秀参展作品。暨南大学附属小学六年级学生刘名修的作品“环保电池”经过激烈角逐，最终摘得双金一一第69届纽伦堡国际发明金奖和第10届世界创意节创意金奖。 刘名修一个11岁的中国小学生，夺得了两项金奖，引起了