In:
Journal of the American Ceramic Society, Wiley, Vol. 99, No. 9 ( 2016-09), p. 3002-3007
Kurzfassung:
Tetragonal BaTiO 3 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 2Ɵ~45° and 310, 520, and 720 cm −1 characteristic vibrational modes in Raman spectroscopic measurements confirm the tetragonal crystallographic structure of Ba TIO 3 bulk samples. The 1100°C annealed BaTiO 3 sample showed optimal tetragonality ~1.016 and the same is used for BaTiO 3 –acrylonitrile butadiene rubber ( NBR ) composites at different BaTiO 3 loading fractions in parts per hundred ( PHR ). These BaTiO 3 / NBR composite systems exhibit dual band microwave resonance, widening the operating window for microwave absorption applications. Eighty PHR BaTiO 3 / NBR composite exhibits microwave reflection losses ( RL ) at 9.5 and 16.5 GH z with ~−9 and ~−18 dB reflection losses, respectively. The onset of dual band is attributed to the ferroelectric‐induced dipolar relaxation at 9.5 GH z and its second‐order resonance at 16.5 GH z in such composite systems.
Materialart:
Online-Ressource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.2016.99.issue-9
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2016
ZDB Id:
2008170-4
ZDB Id:
219232-9
