Variation of Piezoelectric Transformer Electrode by Oxidation in Piezoelectric Inverter with Driving Time

• Published in: Ferroelectrics Vol. 409; no. 1; pp. 45 - 54
• Main Authors: Joo, Hyeonkyu, Kim, Insung, Song, Jaesung, Jeong, Soonjong, Kim, Minsoo
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Colchester Taylor & Francis Group 01.01.2010; Taylor & Francis; Taylor & Francis Ltd
• Subjects: Ag oxidation; Applied sciences; Correlation; Electrical engineering. Electrical power engineering; Electrodes; Exact sciences and technology; Ferroelectric materials; Ferroelectrics; Inverters; Materials science; Oxidation; Piezoelectric ceramics; Piezoelectric inverter; Piezoelectric transformer; Piezoelectricity; PNN-PMN-PZT; Quality factor; Studies; Transformers; Transformers and inductors; Inverter; Electric transformer; Ternary system; Q factor; Nickel Lead Niobates Mixed; PZT; Electromechanical coupling; Piezoelectric ceramics; PNN-PMN-PZT; Ag oxidation; Piezoelectric device; Sintering; Oxidation; Piezoelectric inverter; Piezoelectric transformer; Lead magnesium niobates
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150193.2010.485894

Multi layer piezoelectric transformer has an advantage of the high step-up ratio, high electromechanical coupling coefficient (K p ) and high mechanical quality factor (Q m ). However, they are subject to the electrode-crack and the need for an increased sintering temperature make the electrodes costly. The electrode-crack correlates to electrode oxidation in multi layer piezoelectric transformers and it is attended with drop-off in efficiency. In this study, high-power Rosen-type piezoelectric transformer were manufactured, and then investigated about electrode oxidation according to lapse of time for 4 month. The basic composition of piezoelectric ceramics consists of ternary 0.01Pb(Ni 1/3 Nb 2/3 )O 3 -0.08Pb(Mn 1/3 Nb 2/3 )O 3 -0.91Pb(Zr 0.505 Ti 0.495 )O 3 .