Surface functionalization of BiFeO3: A pathway for the enhancement of dielectric and electrical properties of poly(methyl methacrylate)--BiFeO3 composite films

doi:10.1007/s11706-017-0364-1

Frontiers of Materials Science

2017, Vol. 11

Issue (1): 82-91 https://doi.org/10.1007/s11706-017-0364-1

本期目录

Surface functionalization of BiFeO₃: A pathway for the enhancement of dielectric and electrical properties of poly(methyl methacrylate)--BiFeO₃ composite films

Mukesh Kumar MISHRA¹,Srikanta MOHARANA¹,Banarji BEHERA²,Ram Naresh MAHALING¹(

)

¹. Laboratory of Polymeric and Materials Chemistry, School of Chemistry, Sambalpur University, Odisha, India
². Materials Research Laboratory, School of Physics, Sambalpur University, Odisha, India

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Abstract：

A novel two-phase composite film is prepared by the solvent casting method employing poly(methyl methacrylate) (PMMA) as polymer matrix and bismuth ferrite (BFO) as ceramic filler. The surfaces of BFO are functionalized by proper hydroxylating agents to activate their chemical nature. The structural analysis of the composite films confirms that the composites made up of functionalized BFO (BFO-OH) have a distorted rhombohedral structure. The morphological analysis shows that BFO-OH particles are equally distributed over the polymer matrix. The −OH functionality of BFO-OH is confirmed by FTIR. The dielectric and electrical studies at a frequency range from 100 Hz to 1 MHz reveal that PMMA–(BFO-OH) composites have enhanced dielectric constant as well as electrical conductivities, much higher than that of unmodified composites. According to the ferroelectric measurement result, the hydroxylated composite film shows a superior ferroelectric behavior than that of the unmodified one, with a remanent polarization (2P_r) of 2.764 μC/cm².

Key words： functionalized bismuth ferrite composites AC electrical conductivity dielectric properties

收稿日期: 2016-10-27 出版日期: 2017-01-22

Corresponding Author(s): Ram Naresh MAHALING

引用本文:

. [J]. Frontiers of Materials Science, 2017, 11(1): 82-91.
Mukesh Kumar MISHRA,Srikanta MOHARANA,Banarji BEHERA,Ram Naresh MAHALING. Surface functionalization of BiFeO₃: A pathway for the enhancement of dielectric and electrical properties of poly(methyl methacrylate)--BiFeO₃ composite films. Front. Mater. Sci., 2017, 11(1): 82-91.

链接本文:

https://academic.hep.com.cn/foms/CN/10.1007/s11706-017-0364-1
https://academic.hep.com.cn/foms/CN/Y2017/V11/I1/82

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