Microwave Synthesis of Noncentrosymmetric BaTiO3 Truncated Nanocubes for Charge Storage Applications

被引：31

作者：

Swaminathan, V. ^{[1
]}

Pramana, Stevin S. ^{[1
]}

White, T. J. ^{[1
,2
]}

Chen, L. ^{[1
]}

Chukka, Rami ^{[1
]}

Ramanujan, R. V. ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[2] Australian Natl Univ, Ctr Adv Microscopy, Canberra, ACT 2601, Australia

来源：

ACS APPLIED MATERIALS & INTERFACES | 2010年 / 2卷 / 11期

关键词：

BaTiO3; charge storage; memory devices; microwave hydrothermal synthesis; multilayer ceramic capacitor; FERROELECTRIC PHASE-TRANSITION; BARIUM-TITANATE; HYDROTHERMAL SYNTHESIS; CRYSTAL-STRUCTURE; THIN-FILMS; SIZE; MICROSTRUCTURE; CAPACITORS; PARTICLES; GROWTH;

D O I：

10.1021/am1004865

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Truncated nanocube of barium titanate (BT) were synthesized using a rapid, facile microwave-assisted hydrothermal route. Stoichiometric composition of pellets of nanocube BT powders was prepared by two-stage microwave process. Characterization by powder XRD, Rietveld refinement, SEM, TEM, and dielectric and polarization measurements was performed. X-ray diffraction revealed a polymorphic transformation from cubic Pm3m to retragonal P4mm after 15 min of microwave irradiation, arising from titanium displacement along the c-axis. Secondary electron images were examined for nanocube BT synthesis and annealed a different timings. Transformation electron microscopy showed showed a narrow particle size distribution with an average size of 70 +/- 9 nm. The remanence and saturation polarization were 15.5 +/- 1.6 and 19.3 +/- 1.2 mu C/cm(2), respectively. A charge storage density of 925 +/- 47 nF/cm(2) was obtained Pt/BT/Pt multilayer ceramic capacitor stact had an average leakage current density of 5.78 +/- 0.46 x 10(-8) A/cm(2) at +/- 2 V. The significance of this study shows an inexpensive and facile processing platform for synthesis of high-R dielectric for charge storage applications.

引用

页码：3037 / 3042

页数：6

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