Dielectric characterization of microwave sintered lead zirconate titanate ceramics. Issue 13 (October 2016)

• Record Type: Journal Article
• Authors: Gonçalves, Mayra D.; Souza, Flavio L.; Longo, Elson; Leite, Edson R.; Camargo, Emerson R.
• Is Part Of: Ceramics international. Volume 42:Issue 13(2016)
• Page Start: 14423
• Page End: 14430
• Publication Date: 2016-10
• Subjects: PZT -- Chemical synthesis -- Dielectric response -- Sintering -- Ceramics; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.06.035
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Highly reactive lead zirconate titanate powders (PZT) with different compositions were successfully synthesized by the oxidant-peroxo method (OPM) and used to prepare dense ceramic samples with composition near to the morphotropic phase boundary (MPB) sintered at 1000 °C for 2 h using a tubular conventional oven and a commercial microwave system. Crystalline phases were identified in the powder and ceramic samples by X-ray powder diffraction and FT-Raman spectroscopy at room temperature. The fractured surface of the ceramic sample showed a high degree of densification with fairly uniform grain sizes. Dielectric constants measured in the range from 30 to 500 °C at different frequencies (1, 10 and 100 kHz) indicated a normal ferroelectric behavior regardless of the sintering method. Samples sintered by a microwave radiation (MW) method and composition near to the MPB region showed a maximum dielectric constant of 17.911 and an anomalous high Curie temperature of 465 °C.