https://scholars.lib.ntu.edu.tw/handle/123456789/74816
Title: | 多相材料的微結構設計(III)奈米鈦酸鋇多相材料 | Authors: | 段維新 | Issue Date: | 2004 | Publisher: | 臺北市:國立臺灣大學材料科學與工程學研究所 | Abstract: | Nickel is now used as the internal electrode for the multilayer ceramic capacitors (MLCCs). In order to increase its volume efficiency, the size of Ni particles decreases from micrometer-sized range to nanometer-sized range. In the present study, nano-sized Ni particles are mixed intimately with BaTiO3 powder. The powder compacts are then co-fired in an atmosphere with low oxygen partial pressure. The sintering behavior of the Nidoped BaTiO3 is investigated. The presence of the nanometer-sized Ni inclusions can inhibit the grain growth of BaTiO3. The solubility of Ni in BaTiO3 during co-firing is also determined. Two techniques have been applied to determine the solubility. Consistent results are obtained. The solubility of the Ni in the BaTiO3 is around 1000±100 ppm after cofiring at 1330°C for 2 h in N2. 目前金屬線已常被使用為高容值積層陶瓷電容(MLCC) 的內電極,且為了提升體積效率,金屬鎳顆粒已由微米級尺寸降至奈米級尺寸,本研究探討鈦酸鋇/鎳奈米多相材料的製備及微結構的關聯,研究結果顯示此奈米多相材料可以1330C 以上的溫度及低氧的氣分中,以無壓燒結法製備,在此條件下 1000 ± 100 ppm 的鎳可溶入鈦酸鋇中,而鎳的擴散距離可達 10 um。鎳溶質的存在可大幅減少鈦酸鋇不正常晶粒的產生,但鎳溶質及鎳顆粒皆會大幅降低緻密化及晶粒成長速率。 |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/12478 | Other Identifiers: | 922216E002029 | Rights: | 國立臺灣大學材料科學與工程學研究所 |
Appears in Collections: | 材料科學與工程學系 |
File | Description | Size | Format | |
---|---|---|---|---|
922216E002029.pdf | 1.01 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.