Characterization and estimation of dielectric constant of electrospun BaTiO3 nanofibers at different calcination temperatures using theoretical models

被引：10

作者：

Hedayati, Mehdi ^{[1
,2
]}

Taheri-Nassaj, Ehsan ^{[1
]}

Yourdkhani, Amin ^{[1
]}

Borlaf, Mario ^{[2
]}

Rasekh, Shahed ^{[3
]}

Amirkhizi, Parisa ^{[3
]}

Sebastian, Tutu ^{[2
]}

Payandeh, Seyedhosein ^{[4
]}

Clemens, Frank Jorg ^{[2
]}

机构：

[1] Tarbiat Modares Univ, Sch Engn, Dept Mat Engn, Tehran 14115143, Iran

[2] Swiss Fed Labs Mat Sci & Technol, Empa, Lab High Performance Ceram, CH-8600 Dubendorf, Switzerland

[3] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Mat & Ceram Engn, P-3810193 Aveiro, Portugal

[4] Swiss Fed Labs Mat Sci & Technol, Empa, Lab Mat Energy Convers, CH-8600 Dubendorf, Switzerland

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2021年 / 41卷 / 02期

关键词：

Barium titanate; Nanofibers; Electrospinning; Dielectric; Yamada model; Maxwell Garnett model; BARIUM-TITANATE NANOFIBERS; FERROELECTRIC PROPERTIES; FINE PARTICLES; POLYMER MATRIX; PERMITTIVITY; SIZE; COMPOSITES; PROPERTY; BEHAVIOR; DENSITY;

D O I：

10.1016/j.jeurceramsoc.2020.09.072

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The main aim of this work was to estimate the dielectric constant of electrospun BaTiO3 nanofibers (BT NFs) using theoretical models. The effect of calcination temperatures on morphology and crystal structure of BT NFs was also investigated by using SEM, TEM, XRD and Raman spectroscopy. The dielectric constant of BT NFs was calculated by applying modified Maxwell Garnett and Yamada models on polymer nanocomposite films comprising stearic acid modified BT NFs in Polyvinylidene difluoride (PVDF) matrix. The results showed that although it was detected low tetragonality (1.0041) at lowest calcination temperature (850 degrees C), the better crystallization of BT and high tetragonality could be achieved at a calcination temperature of 1000 degrees C and above. Based on both theoretical models, the dielectric constant of BT NFs calcined at 850 degrees C (around 830) is lower than those calcined at 1000 degrees C (about 1300), which is the result of different tetragonality and grain size.

引用

页码：1299 / 1309

页数：11

共 60 条

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