| Al2O3包覆Ba0.6Sr0.4TiO3复合粉体制备及表征 |
| Preparation and Characterization of Al2O3-Coated Ba0.6Sr0.4TiO3 Composite Powders |
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| 摘要: 采用液相包覆法制备了Al2O3包覆的Ba0.6Sr0.4TiO3复合粉体。通过SEM，TEM，TG-DSC，XRD，XPS和ζ电位测试对包覆前后粉体的表面形貌、组织结构、等电点进行了测试和分析。结果表明：Al2O3以无定形结构成功的包覆在Ba0.6Sr0.4TiO3粉体表面，形成了Ba-O-Al、Sr-O-Al和Ti-O-Al键，Ba0.6Sr0.4TiO3颗粒的等电点由包覆前的pH=3.2增大至pH=8。 |
| 关键词: 钛酸锶钡 氧化铝 表面包覆 复合粉体 |
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| Abstract: Ba0.6Sr0.4TiO3-Al2O3(BSTO-Al2O3) composite powder was prepared by liquid-phase cladding process. The surface morphology, structure and the zeta potential of uncoated and alumina-coated BSTO powder were characterized by SEM, TEM, TG-DSC, XRD，XPS and Malvern Instruments Zetasize Systems. The results indicate that the alumina nanofilms exist in amorphous hydrated alumina phase and anchor at the surfaces of Ba0.6Sr0.4TiO3 particles via Ba-O-Al、Sr-O-Al and Ti-O-Al bonding, the Isoelectric point(IEP) of Ba0.6Sr0.4TiO3 particle shifts from pH=3.2 to pH=8. |
| Keywords: barium strontium titanate aluminum oxide surface coating composite powders |
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| 王 通,高 峰,胡国辛,刘亮亮,李 博,田长生.Al2O3包覆Ba0.6Sr0.4TiO3复合粉体制备及表征[J].无机化学学报,2010,26(5):811-816. |
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