Title :
Dry ultrasonic compaction of (Ba,Sr)TiO3 nanopowder for ceramics production
Author :
Hahn, Suk-Ryong ; Khasanov, O.L. ; Pokholkov, Yu.P. ; Sokolov, V.M. ; Dvilis, E.S. ; Han, Myung-Soo
Author_Institution :
R&D Center, Korea Electron. Co. Ltd., Kyungbuk, South Korea
Abstract :
The method of dry ultrasonic compaction was applied to press sol-gel ultrafine powder of (Ba,Sr)TiO3. Green compacts and sintered ceramics densities were compared depending on the powder compaction conditions (compaction pressure P, ultrasound power W). The grain size of sintered ceramics was analysed in dependence on the compaction conditions and sintering regimes (sintering temperature, holding time, heating rate). It was shown that dry ultrasonic compacting is possible for thin as well as thick green compacts with diameter of 50 mm. To make the most dense ceramics, the existence of optimum BST nanopowder compaction regimes was shown
Keywords :
barium compounds; densification; ferroelectric ceramics; grain size; nanostructured materials; powder technology; sintering; strontium compounds; ultrasonic effects; (BaSr)TiO3; ceramics production; compaction conditions dependence; compaction pressure; dry ultrasonic compaction; grain size; green compacts; heating rate; holding time; nanopowder; optimum compaction regimes; sintered ceramics; sintering temperature; sol-gel ultrafine powder; ultrasound power; Ceramics; Compaction; Grain size; Heating; Matrix converters; Powders; Pressing; Production; Symmetric matrices; Transmission line matrix methods;
Conference_Titel :
Science and Technology, 2000. KORUS 2000. Proceedings. The 4th Korea-Russia International Symposium on
Conference_Location :
Ulsan
Print_ISBN :
0-7803-6486-4
DOI :
10.1109/KORUS.2000.866096
