Effect of B2O3 on phase structure and electrical properties of CuO-modified (Ba, Ca)(Ti, Sn)O3 lead-free piezoceramics sintered at a low-temperature. Issue 6 (1st May 2016)

• Record Type: Journal Article
• Authors: Zhao, Lei; Zhang, Bo-Ping; Wang, Wen-Yu; Ding, Ya-Hong; Zhang, Si-Meng; Zhu, Li-Feng; Wang, Ning
• Is Part Of: Ceramics international. Volume 42:Issue 6(2016)
• Page Start: 7366
• Page End: 7372
• Publication Date: 2016-05-01
• Subjects: Lead-free Piezoceramics -- Phase Structure -- Electrical Properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.01.139
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: This work investigated the effect of B2 O3 on phase structure and electrical properties of CuO-modified (Ba0.95 Ca0.05 )(Ti0.90 Sn0.10 )O3 –0.5CuO –x B2 O3 (BCTSCu0.5 B x, 0≤ x ≤1.8 mol.%) lead-free ceramics sintered at a low sintering temperature ( Ts= 1200 °C). It was found that co-doping CuO and B2 O3 is effective both on obtaining a dense microstructure and increasing the Curie temperature ( TC ) in BCTSCu0.5 B x ceramics. In addition to the sintering aids behavior of both CuO and B2 O3 to reduce Ts, the increased TC mainly stems to the solid solution of B 3+ which enters initially tetrahedral sites and then V O and the sites between an apical O 2− and Ti 4+ with increasing its content. Good piezoelectric properties of d 33 =360 pC/N and kp =30% with an enhanced TC (49 °C) were obtained at x =1.4 owning to a proper proportion of rhombohedral and tetragonal phase even the Ts was as low as 1200 °C.