Lei Miao
,
Sakae Tanemura
,
Thi Hue Nguyen
,
Li Luo
,
Masaki Tanemura
,
Shoichi Toh
,
Kenji Kaneko
,
Masahiro Kawasaki
材料科学技术（英文）
An alternative sol-gel method has been applied to fabricate anatase and rutile TiO2 coatings uniformly on Al scale fibers with very thin naturally oxidized layer from mixed precursors of Ti tetraisopropoxide, acetyl acetone, deionizer water and ethanol in different molar ratios. The crystal structure of TiO2 coatings on Al scale fiber was confirmed by both XRD and TEM. The surface morphology of the coatings was observed by SEM and the chemical composition of the grown TiO2 was analyzed by EDS in TEM. Anatase coating, having a fine crystalline structure, was grown at 450℃ while rutile was being done at 670℃. The TEM results indicated that the fabricated TiO2 coatings consisted of anatase/rutile polycrystalline structures. The optimal fabrication conditions for TiO2 coatings with about 400 nm in thickness on Al scale fibers were established through the characterization results.
关键词:
Sol-gel method
,
null
,
null
,
null
,
null
Lei Miao
,
Sakae Tanemura
,
Shoichi Toh
,
Kenji Kaneko
,
Masaki Tanemura
材料科学技术（英文）
The controlled growth of densely assembled single-phase rutile-TiO2 nanorods was demonstrated by a heating-sol-gel template process with about $\sim$300~nm in diameter and several micrometers in length. Transmission electron microscopic observation reveals these rutile-TiO2 nanorods are the aggregates of many nanocrystallites grown preferentially to the [110] zone axis direction with about 10~30 nm in diameter. The calculation and comparison of d-spacing values with those of bulk values suggest the crystal structure of nanorods close to bulk materials. Selected area electron diffraction and energy dispersive X-ray spectroscopy measurements confirm that the obtained nanorods are rutile-TiO2 nanorods with good compositional uniformity and consist of distinct shape of nanocrystallites with 10～30 nm diameter.
关键词:
Rutile-TiO2
,
null
,
null
,
null
,
null
张勤俭
,
吴春丽
,
李敏
,
张勤河
,
秦勇
,
毕进子
,
张建华
材料科学与工程学报
doi:10.3969/j.issn.1673-2812.2001.03.012
采用灰色关联矩阵分析理论,阐述了制备SiO2溶胶正交试验的灰色关联分析方法,给出了其算法并编制了相关的程序.对溶胶主要制备因素HNO\-3∶TEOS\,H\-2O∶TEOS和E\-tOH∶T EOS(摩尔比)对溶胶胶凝时间的影响程度进行了研究,对实际的科研工作具有指导意义.
关键词:
SiO\-2溶胶
,
灰色关联分析
,
正交试验
