摘要
为改善无定形硼粉和HTPB黏合剂体系的流变性能,用乙醇、蒸馏水对无定形硼粉进行了提纯处理,通过X射线荧光光谱仪、酸度计、HAAKE流变仪、X射线电子能谱仪分别表征了提纯处理后硼粉的表面性能。结果表明,硼粉的提纯处理使硼元素含量小幅度增加,硼粉表面酸性降低,B/HTPB混合物的屈服值和表观黏度增长减缓。对不同纯度的硼粉进行了XPS分析,结果表明,在硼粉表面结合能为189 eV处存在一种硼的化合物,可能是由部分B2O3和H3BO3杂质与单质硼形成的某种缔合态的BXO化合物,使B2O3和H3BO3不能完全被溶解、驱除。提纯残留物分析说明,两种溶剂提纯均有利于去除硼粉表面的H3BO3杂质,同时,蒸馏水能提纯少量的B2O3杂质。提纯作为B粉包覆的预处理具有一定的作用。
In order to improve the rheological property of amorphous boron powder with HTPB binder,the boron powder was purified with ethanol and distilled water. The effect of purification on surface performance of boron were characterized with X radial fluorescent spectrograph,HAAKE rheometer,acidity meter and XPS. The results show that the content of B can be increased by purification,the surface acidity of boron reduces and the apparent viscidity and yield value of B/HTPB mixture increase slowly with the increase of mixing time. The boron concentration analysis of different boron powder by XPS indicates that a sort of boron compound BxO exists in boron powder surface with the binding energy of 189eV,which maybe form from parts of B2O3,H3BO3 and B in some kind of complex compound and prevents the dissolving of B2O3 and H3BO3 from boron powder surface. The analysis of purified residue indicates that the purification with ethanol and distilled water is benefit to remove H3BO3 in boron surface,and purification with distilled water can remove a small quantity of B2O3. Therefore,as a pretreatment method,the purification of boron has good effect to some extent.
出处
《火炸药学报》
EI
CAS
CSCD
2007年第2期8-12,共5页
Chinese Journal of Explosives & Propellants
基金
火炸药燃烧国防科技重点实验室基金课题(9140C35030106ZS3504)
关键词
分析化学
含硼富燃料固体推进剂
提纯
流变性能
表面酸度
analytical chemistry
boron-based fuel-rich solid propellant
purification
rheological property
surface acidity
