摘要
研究了在KCl-KBF4体系和KCl-KBF4-B2O3体系中熔盐电解法制备硼粉的工艺条件。对KCl-KBF4体系采用正交试验法研究了熔盐配比、温度、阴极电流密度和电解时间对硼粉纯度及电流效率的影响,得到的最佳实验条件为:KCl∶KBF4为5∶1,温度750℃,阴极电流密度1.5A.cm-2,电解时间3h。该条件下能得到纯度95%以上的球形非晶态硼粉,电流效率可达到80%以上。KCl-KBF4-B2O3体系熔盐电解得到超细球形硼粉,但电流效率低,产品难以收集,杂质含量较高。
The feasibility and optimum process of boron powder preparation was studied in KCl-KBF4 and KCl-KBF4-B2O3 molten salt systems.In KCl-KBF4 molten salt systems,the effects of molten salt composition,temperature,cathode current density and electrolysis time on purity and current efficiency were investigated by orthogonal experimental method.The results showed that the purity of amorphous boron with more than 95% spheres shape was obtained under the condition in that the ratio of KCl∶KBF4 was 5∶1,temperature wa...
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2010年第2期264-270,共7页
Chinese Journal of Rare Metals
基金
军品配套项目(JPPT-115-2-1226)资助
