CAJ | 학술논문

通过X射线衍射、颗粒粒度测量、红外光谱以及N2吸附技术分析干磨对一水硬铝石结构的影响.球磨可增加一水硬铝石的BET(Brunauer-Emmet-Teller)比表面积.但随着球磨时间的延长,颗粒粒径的减小速率会逐渐降低.球磨2 h后,一水硬铝石颗粒粒径的减少存在一个极限.研究表明,球磨过程会引发颗粒的团聚.随着球磨时间的增加,所引发的机械化学效应显著加剧一水硬铝石的X射线衍射谱中各晶面衍射峰强度的降低,但在1～2 h内没有新的物相生成,一水硬铝石的α-AlOOH结构保持完整,这对于一水硬铝石深加工制备功能矿物材料十分有利.N2吸附研究表明,球磨12 h后一水硬铝石颗粒的孔径比球磨6h和原始样品的孔径稍小,这充分说明干磨有利于颗粒微孔结构的形成,为制备催化和多孔材料奠定了较好的基础.红外分析结果显示,机械化学处理后一水硬铝石的特征峰也会发生一定的变化.
통과X사선연사、과립립도측량、홍외광보이급N2흡부기술분석간마대일수경려석결구적영향.구마가증가일수경려석적BET(Brunauer-Emmet-Teller)비표면적.단수착구마시간적연장,과립립경적감소속솔회축점강저.구마2 h후,일수경려석과립립경적감소존재일개겁한.연구표명,구마과정회인발과립적단취.수착구마시간적증가,소인발적궤계화학효응현저가극일수경려석적X사선연사보중각정면연사봉강도적강저,단재1～2 h내몰유신적물상생성,일수경려석적α-AlOOH결구보지완정,저대우일수경려석심가공제비공능광물재료십분유리.N2흡부연구표명,구마12 h후일수경려석과립적공경비구마6h화원시양품적공경초소,저충분설명간마유리우과립미공결구적형성,위제비최화화다공재료전정료교호적기출.홍외분석결과현시,궤계화학처리후일수경려석적특정봉야회발생일정적변화.
The effects of dry grinding of diaspore (α-AlOOH) on the structure of diaspore were investigated by means of X-ray diffraction(XRD), particle size measurement, infrared (IR)spectroscopy and nitrogen adsorption techniques. Grinding of diaspore can increase the Brunauer-Emmet-Teller surface area of diaspore. As the grinding time is prolonged, the rate of size reduction decreases gradually. The size reduction of the original diaspore particle appears to reach a limit after 2 h grinding. Particle size data suggest that moderate aggregation occurs during grinding. The mechanochemical effect obviously promotes the decreases in reflection intensities of XRD with the increase the grinding time, but no new phase appears between 1 h to 2 h grinding, and the structure of α-AlOOH is still retained perfectly. N2 adsorption study indicates that diaspore ground for 12 h shows a little smaller average pore diameter than the sample ground for 6 h and the original diaspore as well. This shows that the grinding is favorable for the formation of microstructure pores. IR spectroscopy analysis indicates that some change accurs in the bands of diaspore after mechanochemical treatment.