Enhanced magnetoelectrical coupling in cobalt ferrite/lead lanthanum zirconate titanate 0-3 composites through phase boundary modification

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• 作者：Kun Li ; Dong-Liang Shi ; Yin Zhu ; Yu Wang ; Helen Lai-wa Chan ; Song Peng
• 关键词：Ferroelectricity ; Ceramics ; Piezoelectricity ; Composite materials
• 刊名：Materials Chemistry and Physics
• 出版年：16 December, 2013
• 年：2013
• 卷：143
• 期：1
• 页码：34-40
• 全文大小：2300 K

文摘

We have developed a processing technique for producing cobalt ferrite (CFO)/lead lanthanum zirconate titanate (PLZT) 0-3 composites with enhanced piezoelectric, ferroelectric and magnetoelectrical (ME) coupling properties. It includes modifying the phase boundary with zirconia barrier layer and decreasing the sintering temperature with Li₂O聽+聽0.5Bi₂O₃ additives. The CFO/PLZT 0-3 composites were successfully fabricated via conventional co-firing procedures. The obtained 0-3 composite ceramics can withstand a DC electric field of 6聽kV聽mm^鈭?. The effects of CFO/PLZT ratio on the crystalline structure, piezoelectric, ferroelectric, dielectric and M-E properties were investigated. The M-E coefficients of the composites with CFO:PLZT volume ratio of 14.4:85.6, 27.4:72.6 and 39.3:60.7 were found to be 31, 52 and 143聽mV聽(Oe聽cm)^鈭? at 100聽kHz under a bias field of 鈭?聽kOe.