Phase segregation in binary SiO2/TiO2 and SiO2/Fe2O3 nanoparticle aerosols formed in a premixed flame

被引：66

作者：

Ehrman, SH

Friedlander, SK

Zachariah, MR

机构：

[1] Univ Calif Los Angeles, Dept Chem Engn, Air Qual & Aerosol Technol Lab, Los Angeles, CA 90095 USA

[2] NIST, Chem Sci & Technol Lab, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF MATERIALS RESEARCH | 1999年 / 14卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1557/JMR.1999.0617

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Binary SiO2/TiO2 and SiO2/Fe2O3 nanoparticle (diameter < 100 nm) aerosols of varying mole ratios of Ti or Fe to Si were generated in a premixed Bunsen-type aerosol flame reactor. The distribution of species within the particles was investigated using transmission electron microscopy, electron energy loss spectrometry, x-ray diffraction, and Fourier transform infrared spectroscopy. Phase segregation was observed to varying degrees in qualitative agreement with segregation expected from binary phase diagrams for the bulk systems. Differences between the SiO2/TiO2 and SiO2/Fe2O3 systems can be explained by considering the variation in the thermodynamically stable liquid-phase solubility and differences in the ability of iron and titanium ions to substitute for silicon ions in the network structure.

引用

页码：4551 / 4561

页数：11

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[21] PHASE EQUILIBRIA IN THE SYSTEM CAO-IRON OXIDE-SIO2 IN AIR [J].