多相爆轰管的优化设计及其制备纳米氧化钛材料的探索研究

The Optimization Design of Multiphase Detonation Tube and Exploration on Preparation of Nano Titanium Dioxide

摘要:

以三种前驱气体(CH4-2O2、H2-0.5O2、C2H2-2.5O2)进行爆轰试验，研究了初始压力对爆轰参数的影响及规律，以测得的预混气爆轰压力、速度、胞格等性能参数表征了预混气爆轰特性。以测得的爆轰参数为依据自主设计了长度2m、内径80mm、壁厚8mm、点火能量为40J的爆轰管道。在自主设计的爆轰管道内采用氢气、氧气和四氯化钛为混合前驱体，通过气液爆轰法合成了纳米二氧化钛，采用TEM对产物进行了表征，结果表明获得的纳米二氧化钛其球形或者类球形颗粒大约为20-150nm。

Abstract:

Detonation experiments were carried out with three precursor gases (CH4-2O2、H2-0.5O2 、C2H2-2.5O2). The detonation characteristics of premixed gas were characterized by the measured detonation pressure, velocity and cell size. Based on the measured detonation parameters, a detonation duct with length of 2m, inner diameter of 80mm, wall thickness of 8mm and ignition energy of 40J is designed independently. Nano titanium dioxide was synthesized by gas-liquid detonation with hydrogen, oxygen and titanium tetrachloride as mixed precursors in the independently designed detonation duct. The products were characterized by TEM. The results show that the spherical or quasi spherical particles of the obtained nano titanium dioxide are about 20-150 nm.