Dual Band Resonance in Tetragonal BaTiO3/NBR Composites for Microwave Absorption Applications

被引：16

作者：

Saini, Lokesh ^{[1
,2
,3
]}

Janu, Yojana ^{[1
]}

Patra, Manoj Kumar ^{[1
]}

Jani, Raj Kumar ^{[1
]}

Gupta, Goutam Kumar ^{[2
,3
]}

Dixit, Ambesh ^{[2
,3
]}

Vadera, Sampat Raj ^{[1
]}

机构：

[1] Def Lab, Mat Dev Grp, Jodhpur 342011, Rajasthan, India

[2] Indian Inst Technol, Dept Phys, Old Residency Rd, Jodhpur 342011, Rajasthan, India

[3] Indian Inst Technol, Ctr Solar Energy, Old Residency Rd, Jodhpur 342011, Rajasthan, India

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2016年 / 99卷 / 09期

关键词：

dielectric materials/properties; dielectric relaxation; microwaves; HYDROTHERMAL SYNTHESIS; RESIN COMPOSITES; BARIUM;

D O I：

10.1111/jace.14284

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：

Tetragonal BaTiO3 bulk samples are prepared using the solid-state route in conjunction with intermediate high-temperature annealing steps. The (002) and (200) X-ray diffraction peaks near 2O similar to 45 degrees and 310, 520, and 720 cm(-1) characteristic vibrational modes in Raman spectroscopic measurements confirm the tetragonal crystallographic structure of BaTIO3 bulk samples. The 1100 degrees C annealed BaTiO3 sample showed optimal tetragonality similar to 1.016 and the same is used for BaTiO3-acrylonitrile butadiene rubber (NBR) composites at different BaTiO3 loading fractions in parts per hundred (PHR). These BaTiO3/NBR composite systems exhibit dual band microwave resonance, widening the operating window for microwave absorption applications. Eighty PHR BaTiO3/NBR composite exhibits microwave reflection losses (RL) at 9.5 and 16.5 GHz with similar to-9 and similar to-18 dB reflection losses, respectively. The onset of dual band is attributed to the ferroelectric-induced dipolar relaxation at 9.5 GHz and its second-order resonance at 16.5 GHz in such composite systems.

引用

页码：3002 / 3007

页数：6

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