FTIR, dielectric and impedance spectroscopic studies on Bi[sub 3.25]La[sub 0.75]Ti[sub 3-x]Zr[sub x]O[sub 12](x = 0.1,0.3,0.5,0.7 &amp; 1)

Reddy, N. Thirumal; Prasad, N. V.; Kumar, G. S.; Prasad, G.

doi:10.1063/1.4790917

Cited by 3 publications

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“…The plots consisted of two well separated semicircles. Such a shape of Nyquist dependences suggests the presence of two different conduction mechanisms in the measured frequency and temperature range [21][22][23]. The semicircle in the high frequency region was related to the electric properties of the grains, the second one (in the low frequency region) was related to the grain boundary.…”

Section: Ceramics T C (K) ε Max T Dev (K) C × 10 5 (K) ∆T (K) T 0 (K)mentioning

confidence: 83%

Dielectric and Impedance Studies of (Ba,Ca)TiO3 Ceramics Obtained from Mechanically Synthesized Powders

et al. 2019

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Mechanochemical synthesis offers unique possibility of perovskite phase formation at ambient conditions that is very attractive (simplifies production, allows strict stoichiometry control and brings economic benefits). In this work the mechanochemical synthesis has been used for preparation ofBa1−xCaxTiO3 (0.2 ≤ x ≤ 0.3) powders from simple oxides. The 20 h milled powders have been uniaxially pressed and sintered in order to get the ceramic samples. The sample morphologies have been observed by scanning electron microscopy. Dielectric and impedance studies have been performed on ceramics. The obtained results indicate that the two mechanism of doping occurred. The first one is observed for the lower calcium concentration (below 0.3) and consists of the introduction of calcium ion into the A site of the perovskite structure. The second one is observed for the higher calcium concentration (equal 0.3). In this case the calcium ions partially occupies the B site in the perovskite structure. Both cases have different influence on the final properties of the ceramics because they induce different defects.

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Section: Ceramics T C (K) ε Max T Dev (K) C × 10 5 (K) ∆T (K) T 0 (K)mentioning

confidence: 83%