Synthesis and Characterization of Sol-Gel Alumina Fiber by Seeding α-Alumina Through Extended Ball Milling

被引：11

作者：

Chandradass, J. ^{[1
,3
]}

Bae, Dong Sik ^{[3
]}

Balasubramanian, M. ^{[1
,2
]}

机构：

[1] Indian Inst Technol, Composites Technol Ctr, Madras 600036, Tamil Nadu, India

[2] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

[3] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Nanopowder Proc & Synth Lab, Chang Won, Gyeongnam, South Korea

来源：

MATERIALS AND MANUFACTURING PROCESSES | 2008年 / 23卷 / 08期

关键词：

Al2O3; Fibers; Grain size; Mechanical properties; Microstructure; SEM; Sintering; Sol-gel processes; Strength; Thermal analysis; X-ray diffraction;

D O I：

10.1080/10426910802382098

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alumina fibers were prepared by sol-gel process using alpha-Al2O3 seeded boehmite sol. The starting material used for the preparation of boehmite sol was aluminium-tri-isopropoxide. Extended ball milling of boehmite sol using alumina grinding media was carried out to incorporate nucleating seeds of alpha-Al2O3 to boehmite sol. Differential thermal analysis showed that the phase transition to alpha-Al2O3 takes place at a much lower temperature by seeding alpha-Al2O3. The presence of alpha-Al2O3 seeds decreases the sintering temperature and a relatively dense microstructure with very fine grain size is formed at 1300 degrees C. The fibers sintered at 1300 degrees C have the highest tensile strength.

引用

页码：786 / 790

页数：5

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