A study of Bi0.5Na0.5TiO3 ceramic characteristics

• Main Authors: Po-Chi Chen, 陳柏智
• Other Authors: Wen-Pin Weng
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/60457729715448314654

碩士 === 龍華科技大學 === 工程技術研究所 === 98 === This research consists of three parts: (I) the mixing method of Bi0.5Na0.5TiO3 powders preparation processes; (II) the study of Bi0.5Na0.5TiO3 ceramics sintering processes; (III) the study of Bi0.5Na0.5TiO3 ceramics polarization and electrical analysis. In the preparation of ceramic powders. We used zeta potention and laser particle analyzer measure the adding different dispersing and amounts, In the used of different pressure, sintering temperature and holding temperature time condition to the density compared of ceramic. With SME, XRD and impedance analyer of ceramic materials charaterzation and ceramic electricity. Adding 3wt% of PMAA Mw: 9500 dispersing, disperse the best and the size of about 335nm, ceramic powder pressure in spindles of machine available to the 50 kg/cm2 relative density about 60.1%, holding temperature of 1150℃ sintering 6 hours and relative density about 93.53%. With pressure, sintering temperature, holding temperature time increased, relative density increased of ceramics. Sintered at different temperatures ceramics by the analysis of electrical impedance analysis ,when the sintering temperature is 1150℃, 1MHz measure the capacitance value under 34.1188 × 10-12F, the dielectric constant up to 274.8196, its value is the best.