PTCR-NTCR composite behavior of bismuth titanate ceramics

Sharanappa, Nagbasavanna; Madolappa, Shivanand; Sagar, Raghavendra; Raibagkar, R. L.

doi:10.1063/1.4810350

Cited by 6 publications

(2 citation statements)

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“…Temperature is ranging from room temperature to 600 0 C. ɛ r is found to increase with increase in temperature in all the samples. Curie Among the all ceramic samples, maximum ɛ r of 5812 was observed for x = 0.60, at T c of 520 0 C. It was also observed that BLT samples compared with our previously reported BT (x = 0) ceramics [10] possess a higher  r indicating that La plays an important role in the electrical properties of the BT layers. Doping BT with La has a strong influence on the dielectric behavior of the material even at low and high concentration [13].…”

Section: Electrical Analysissupporting

confidence: 60%

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Thermal, Microstructure and Dielectric Behavior of La-Modified Bismuth Titanate Ceramic

Sharanappa¹

2014

IJRET

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Environmentally safe and lead free La-modified bismuth titanate (BLT) was synthesized by conventional solid state reaction method. The thermal, dielectric, Microstructural behaviors of BLT ceramic have been investigated. Based on the thermal stability of BLT, samples were calcined at 750 0 C, percentage weight loss and thermal behavior was studied by TGA/DSC. The influence of La on crystal structure of BLT showed orthorhombic crystal structure. Increase of La concentration does not show a secondary phase. Among all the La-doped BLT ceramic samples, x = 0.60 exemplified good results. Dielectric permittivity of BLT is higher at x = 0.60 comparing to other, microstructure study of sintered ceramic sample showed plate-like shape with enhanced density. The results show that the La 3+ doped BLT ceramics may be used as a probe for the phase transition of the ferroelectric materials.

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Section: Electrical Analysissupporting

confidence: 60%

“…It is known that oxygen-vacancy migration in BT produces significant degradation problems associated with the ferroelectric properties. It has been reported that the oxygen-vacancy resettlement with A-site rare earth ion substitution for the volatile Bi ion and also significantly affects its properties [8][9][10].…”

Section: Introductionmentioning

confidence: 99%