Research on the structure of synthetic Fe3+-doped chrysotile nanotubes
(0) By hydrothermal method and contorling reaction-parameters and different Fe3+-doping concentration, chrysotile samples were synthesized from activated MgO and nanophase SiO2. X-ray fiffraction analysis (XRD) and infra-red sepectrometry analysis (IR) were used to study these samples, and the cell parameters were also analysed. The results show that: (1) Monoclinic chrysotile with perfect crystal structure can form in the Fe3+-doping concentration range from 0 to 2.06％ (Fe/(Mg+Si) mol ratio); (2) Heightening of Fe3+-doping concentration can lead to a little reduction of synthetic chrysotile crystallinity, also induce more Fe3+ enter octahedron crystal lattices of chrysotile, both can cause the augmentation of crystal structure symmetry; (3) The cell paramater b-value of Fe3+-doped chrysotile is samaller than that of pure chrysotile, and minishes as the Fe3+-doping concentration heightens while the concentration is below 1.01％. But there is no obvious law while it is above this concentration.
Hydrothermal synthesis chrysotile nanotubes Fe3+-doped cell paramaters
李明 彭同江 马国华
西南科技大学矿物材料与应用研究所,四川绵阳 621010
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）