Microstructure and electrical properties of 0-3 connectivity barium titanate−Portland cement composite with 40% barium titanate content

• المؤلفون الرئيسيون: Rianyoi R., Potong R., Ngamjarurojana A., Chaipanich A.
• التنسيق: دورية
• منشور في: 2017
• الوصول للمادة أونلاين: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84982740848&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/41877
• المؤسسة: Chiang Mai University

© 2016 Taylor and Francis Group, LLC. In this paper, a study is presented on the microstructure, dielectric and piezoelectric properties of 0–3 connectivity barium titanate-Portland cement composite with 40% barium titanate content at this composition has an acoustic impedance that match with concrete structure. The results show that both of dielectric constant (ε r ) and dielectric loss (tanδ) of composite were found to decrease with increasing frequency. The ε r value of composite was 239 at a frequency of 1 kHz. In addition, the ferroelectric hysteresis loops of composite indicate that the “apparent” remnant polarization increases as an applied external electrical field increases. Furthermore, the piezoelectric coefficient was 7 pC/N under a low poling field of 1 kV/mm.