采用PCT (Pressure-Content-Temperature)、XRD、SEM等测试方法对掺杂不同过渡金属氧化物(TiO2,ZrO2,Cr2O3,ZnO)的NaAlH4试样的放氢性能进行研究.结果表明,掺杂TiO2和ZrO2的NaAlH14试样的放氢性能较好.此外,所研究球磨工艺明显改善了NaAlH4的放氢性能.SEM结果发现,球磨3h的Zr-NaAlH4试样效果最佳,此时粉体吸附在较大颗粒四周,随球磨时间的延长,NaAlH4粉体颗粒发生团聚.XRD结果表明,NaAlH4球磨后的结构并未发生明显变化,这说明NaAlH4具有良好的稳定性.
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