Morphology and microstructural properties of TiO2 nanopowders doped with trivalent Al and Ga cations

被引：44
作者：
Depero, LE
Marino, A
Allieri, B
Bontempi, E
Sangaletti, L
Casale, C
Notaro, M
机构：
[1] Univ Brescia, Ist Nazl Fis Mat, I-25133 Brescia, Italy
[2] Univ Brescia, Dipartimento Meccan, I-25133 Brescia, Italy
[3] Univ Cattolica Sacro Cuore, Ist Nazl Fis Mat, I-25121 Brescia, Italy
[4] Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, I-25121 Brescia, Italy
[5] Ente Nazl Energia Elettr Struttura Ricerca, I-20090 Segrate, Italy
来源：
JOURNAL OF MATERIALS RESEARCH | 2000年 / 15卷 / 10期
关键词：
D O I：
10.1557/JMR.2000.0299
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of doping on the morphological and microstructural properties of TiO2 nanopowders produced by laser pyrolysis were investigated mainly by x-ray diffraction (XRD) and electron microscopy. Samples of TiO2 powders were prepared by doping with different trivalent cations (Al and Ga). The powders were calcined at different temperatures in the range 400-1000 degrees C for 18 h, as well as at constant T = 700 degrees C up to 160 h, After each thermal treatment, XRD patterns were collected. The analysis of XRD patterns allowed us to estimate the microstrains and average crystallite size and to observe the evolution of the microstructural parameters with temperature. Both Al and Ga inhibited the crystallite growth of TiO2 anatase and the rutile phases, this effect being larger in the Al-doped powders.
引用
收藏
页码：2080 / 2086
页数：7
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