摘要
在B_2O_3-CeO_2-Mg体系中引入发热剂KClO_3,利用盐助燃烧法制备超细高纯度CeB_6粉体,研究成型压力对盐助燃烧合成超细CeB_6粉体粒度和纯度的影响。借用SEM、EDS、TEM和XRD探讨了盐助燃烧合成法制备CeB_6粉体的形成机理。结果表明,燃烧合成的主要产物为CeB_6,且随着成型压力的增大,浸出后产物的平均颗粒尺寸略微有增加,平均尺寸为0.830～0.930μm,整体粒度分布较为均匀;浸出产物的纯度随着成型压力的增加呈现出先增加后减小的趋势,当压力为20 MPa时,纯度达到最大值99.0%,但不同压力下各试样纯度均在98.0%以上。
The exothermal agent KClO3 was added to the B2O3-Ce O2-Mg system to prepare the ultra-fine CeB6 powders via salt-assisted combustion synthesis. The products were analyzed by XRD, SEM, EDS and TEM. The formation mechanisms of the CeB6 as well as the effect of compaction pressure on the phase composition, average particle size and purity of the products after leaching were studied. Results show that the main product of combustion synthesis is CeB6. With increasing the compaction pressure, the average particle size of the synthesis products increases slightly after leaching, which is 0.830~0.930 μm and the particle size distribution of powders is uniform. However, the purity of CeB6 reaches a maximum of 99.0 wt% when the pressure is 20 MPa. The purity of all products under different pressures exceeds 98.0%.
作者
王乾龙
欧玉静
喇培清
冯静
李正宁
石玉
Wang Qianlong;Ou Yujing;La Peiqing;Feng Jing;Li Zhengning;Shi Yu(State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metal,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第2期662-667,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51561020)
关键词
盐助燃烧
成型压力
CeB6粉体
平均粒度
salt-assisted combustion
molding pressure
CeB6 powder
average particle size
