Effect of particle size on dielectric and ferroelectric properties of 0-3 lead magnesium niobate titanate-portland cement composites

• Main Authors: Potong R., Rianyoi R., Jareansuk L., Jaitanong N., Yimnirun R., Chaipanich A.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-79955695088&partnerID=40&md5=ea67caa4026d34911cb6da4a492d9645; http://cmuir.cmu.ac.th/handle/6653943832/6145
• Institution: Chiang Mai University

The effect of lead magnesium niobate titanate (PMNT) particle size on the dielectric and ferroelectric properties of PMNT-Portland cement (PC) composites was investigated. PMNT of various particle sizes (75-425μm) were used at 50% by volume to produce the composites using the mixing and pressing method. Dielectric properties at various frequencies (0.1-20 kHz) and ferroelectrics behavior of the PMNT-Portland cement composites were investigated at room temperature. The results show that the dielectric constant of PMNT- Portland cement composite are found to increase (εr = 154 for particle size 75 μm and εr = 275 for particle size 425 μm (at 1 kHz)), while dielectric loss decreased with increasing particle size of ferroelectric PMNT ceramics. Furthermore, the "instantaneous" remnant polarization (Pir) of composites was found to increase with increasing PMNT particle size.