摘要
制备了一种由惰性组份和纳米颗粒氧化铁组成的纳米结构燃速催化剂（ns-Fe2O3）. X射线衍射（XRD）和透射电镜（TEM）研究显示ns-Fe2O3中的活性组份主要是Fe2O3,其粒子尺寸范围比较宽,从50～200 nm不等且呈不规则状.对高氯酸铵（AP）的催化热分解研究表明,随ns-Fe2O3含量的增加,AP的分解放热量增大,对AP的低温分解峰温影响不大,但使得AP的高温分解峰温持续下降.在RDX/AP/Al/HTPB少烟复合推进剂中添加0.25% （质量百分数,下同） 的ns-Fe2O3催化剂可使6 MPa下的燃速从空白配方的6.31 mm/s提高到8.51 mm/s,增速率达35%;添加量均为1%时,6 MPa下ns-Fe2O3和普通Fe2O3的增速率分别为56%和31%;当ns-Fe2O3的添加量为2%时,6 MPa下的增速率为69%,10 MPa下的增速可高达78%,显示了ns-Fe2O3良好的燃速催化性能;在4～10 MPa范围内,ns-Fe2O3的压强指数比普通Fe2O3的低,但比叔丁基二茂铁和卡托辛的高.
The preparation of a nano-structured burning rate catalyst （ns-Fe2O3） was presented, which is composed of Fe2O3 nano particles and an inert component. The experiments of ns-Fe2O3 using X-ray diffraction （XRD） and transmission electron microscope （TEM） show that the active component in ns-Fe2O3 is mainly Fe2O3, the particle size of Fe2O3 is in the range of 50-200 nm, and the shape of Fe2O3 is irregular. The results of catalytic decomposition of ammonium perchlorate （AP） by ns-Fe2O3 show that, as the amount of ns-Fe2O3 is increased, the apparent exothermic heat of AP in thermal decomposition is greatly enhanced; the decomposition peak temperature at low-temperature range changes little, but it is continuously lowered at high-temperature range. When 0.25 % （by mass percentage） ns-Fe2O3 is added into reduced smoke composite propellant （RDX/AP/Al/HTPB）, the burning rate at 6 MPa is increased from 6.31 mm/s of the propellant without catalyst to 8.51 mm/s of the propellant with ns-Fe2O3 catalyst, showing a burning rate increment of 35 % ; the burning rate increments of ns-Fe2O3 and common Fe2O3 at 6 MPa are 56% and 31% respectively, as 1% catalyst is added; when 2% ns-Fe2O3 is added, the burning rate increments at 6 MPa and 10 MPa reach 69% and 78% respectively, implying an attractive burning rate catalytic property; in the range of 4-10 MPa, the pressure exponent of burning rate for ns-Fe2O3 is lower than that of common Fe2O3 but higher than those of tert-butyl-ferrocene （TBF） and Catocene （GFP）.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2006年第3期553-557,共5页
Acta Armamentarii
关键词
应用化学
含能材料
复合推进剂
燃速催化剂
纳米结构
氧化铁
applied chemistry
energetic material
composite propellant
burning rate catalyst
nanostructure
iron oxide
