Electrical properties of bismuth-doped non-stoichiometric strontium titanate ceramics

✍ Scribed by A.M.S. Correia; J.L. Baptista

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 349 KB
• Volume: 109
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(89)90584-4

✦ Synopsis

Pure and Bi-doped samples of SrTiO: with Sr/Ti ratios ranging from 0.980 to 1.010 were sintered in air at 1500 °C. Grain growth was promoted in the non-stoichiometric bismuth-doped compositions. Unlike the non-doped samples which were ohmic insulators, bismuth-containing specimens showed non-ohmic behaviour, with non-linear coefficients depending on stoichiometry. The dependence of resistivity on temperature and capacitance-voltage analysis were used to correlate the electrical characteristics with accepted models.