超细2,4-二羟基苯甲酸铜粉体的合成及表征

Synthesis and Characterization of Ultrafine Cupric 2,4-Dihydroxy-benzoate(β-Cu)

以五水硫酸铜和2，4-二羟基苯甲酸为原料，利用撞击流-旋转填料床（ISRPB）合成了超细燃烧催化剂2，4-二羟基苯甲酸铜粉体，用TEM、激光粒度分析仪、BET和热重分析技术表征了最终粉体，考察了超重力因子β、撞击初速u和后处理方式对粉体平均粒径的影响。结果表明．在转速1000r／min和撞击初速28m／s以及100℃真空干燥温度的操作条件下，粉体产品为形貌规则的片状结构，平均粒径610nm，大部分粒子分布在0．12～0．363μm，比表面积为11．6265m^2／g。

Using impinging steam-rotating packed bed （IS-RPB）, ultrafine β- Cu powder was synthesized from CuSO4 · 5H2O and β-H as primary substances by high gravity reactive precipitation method. The TEM, laser size analysis （LSA）, BET and TG DTG techniques were used to characterize the product. Effects of the operation conditions of rotational speed,impact velocity and post-treatment conditions on the average particle size of β-Cu were also studied systematically. The results show that the operation conditions are optimized as： rotational speed, 1000r/min, impact velocity, 28m/s and vacuum desiccation temperature, 100℃. Under the abovementioned conditions the sheet /3 Cu particles with size of 0.12μm to 0. 363μm,an average particle size of 610nm and a specific surface area of 11. 626 5m^2/g are obtained.