Structure, dielectric tunability, thermal stability and diffuse phase transition behavior of lead free BZT–BCT ceramic capacitors

Puli, Venkata Sreenivas; Pradhan, Dhiren K.; Pérez, W.; Katiyar, Ram S.

doi:10.1016/j.jpcs.2012.11.012

Cited by 96 publications

(24 citation statements)

References 46 publications

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“…The DPT behavior of NBT-xST films is desired for the practical applications, such as phase shifter and antenna [28]. Dielectric thermal stability of the NBT-xST thick films, which is evaluated by coefficient of permittivity (TCP) defined as [29].…”

Section: Resultsmentioning

confidence: 99%

Structure and dielectric properties of (Na0.5Bi0.5)TiO3–SrTiO3 thick films derived from polyvinylpyrrolidone-modified chemical solution

Hao

2015

J Mater Sci: Mater Electron

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In this work, 1.5-lm (1 -x%)(Na 0.5 Bi 0.5 )TiO 3 -x%SrTiO 3 (abbreviated as NBT-xST, x = 0, 5, 10, 30 and 50) thick films were successfully fabricated on LaNiO 3 /Si (100) substrate by using a polyvinylpyrrolidone-modified chemical solution route. The effects of the substitution of ST on the microstructure and dielectric properties of the thick films were investigated in detail. It was found that the addition of ST could enhance the dielectric tunable properties and decrease the dielectric losses. The dielectric tunability for all the samples was higher than 30 %, and the maximum value of about 53 % was obtained in NBT-30ST film. Moreover, the substitution of ST improved the value of figure of merit of the thick film. These results indicate that NBT-ST thick films might be one of the promising environmentally friendly leadfree materials for dielectric tunable capacitor applications.

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Section: Resultsmentioning

confidence: 99%

Structure and dielectric properties of (Na0.5Bi0.5)TiO3–SrTiO3 thick films derived from polyvinylpyrrolidone-modified chemical solution

Hao

2015

J Mater Sci: Mater Electron

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“…This result implies that the phase compositions are different for the pellets with different glucose contents. The phase composition of BZT-0.5BCT ceramics has been well studied [1,4,14,15], and the (2 0 0) pc -reflections have been generally employed to analyze the phase transition [5,16,17]. Here, we also use the (2 0 0) pc -reflections to study the phase transitions of porous BZT-0.5BCT ceramics with different pores.…”

Section: Phase and Microstructurementioning

confidence: 99%

“…However, the Curie temperature (T C ) for the composition with the best piezoelectric properties (x = 0.5) is relatively low (93°C), thus restricting its applications [1]. Recently, the diffuse phase transition of BZT-xBCT ceramics has been found and attracted much attention [5], which results in good electrocaloric (EC) effects [6][7][8]. Generally, the giant EC effect only exists in a narrow temperature range around T C for the ferroelectrics that have classical ferroelectric phase transition behaviour [9,10].…”

Section: Introductionsmentioning

confidence: 99%

“…Since the diffuse phase transition behaviour is important for both the electrocaloric effect and the piezoelectric properties of BZT-xBCT system, it has caused more and more concerns [5,8,12]. Bai et al [8] have indicated that the EC effect and diffusion transition behaviour are influenced by the composition in lead-free BZT-xBCT ceramics, and the diffused phase transition has a significant impact on the cooling temperature range and the refrigeration capacity of this system.…”

Section: Introductionsmentioning

confidence: 99%

“…However, the reported c values of BZT-xBCT ceramics are scatted even for the ceramics with the same composition. For example, c value of BZT-0.1BCT ceramic is reported as 1.47 by Sreenivas Puli et al [5], and as 1.84 by Bai et al [8], which implies that the diffuse phase transition behaviour of BZT-xBCT ceramics may be affected severely by the manufacturing processes or defects. But the studies on this section are scarcely reported.…”

Section: Introductionsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of pore content on diffuse phase transition behaviour of porous 0.5BaZr0.2Ti0.8O3–0.5Ba0.7Ca0.3TiO3 ceramics

Wang

et al. 2015

Journal of Alloys and Compounds

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Ultralow Loss and High Tunability in a Non‐perovskite Relaxor Ferroelectric

Avdeev

et al. 2022

Adv Funct Materials

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Dielectric ceramics are fundamental for electronic systems, including energy storages, microwave applications, ultrasonics, and sensors. Relaxor ferroelectrics show superb performance among dielectrics due to their high efficiency and energy density by the nature of nanodomains. Here, a novel non‐perovskite relaxor ferroelectric, Bi6Ti5WO22, with ultralow loss, ≈10−3, highly tunable permittivity, ≈2200 at room temperature with 40% tunability and the superparaelectric region at room temperature is presented. The actual crystal structure and the nanodomains of Bi6Ti5WO22 are demonstrat Various‐temperature neutron powder diffraction and in situ high‐resolution transmission‐electron‐microscopy illustrate the twinning effect, subtle structure change and micro‐strain in the material influenced by temperature, manifesting the actual crystal structure of Bi6Ti5WO22. Compared with dielectric loss of BaTiO3‐based dielectric tunable materials, the loss of Bi6Ti5WO22 is more than an order of magnitude lower, which makes it exhibit a figure of merit (≈240), much higher than that of conventional dielectric tunable materials (< 100), endorse the material great potential for direct applications. The present research offers a strategy for discovering novel relaxor ferroelectrics and a highly desirable material for fabricating energy storage capacitors, microwave dielectrics, and ultrasonics.

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Structure, dielectric tunability, thermal stability and diffuse phase transition behavior of lead free BZT–BCT ceramic capacitors

Cited by 96 publications

References 46 publications

Structure and dielectric properties of (Na0.5Bi0.5)TiO3–SrTiO3 thick films derived from polyvinylpyrrolidone-modified chemical solution

Structure and dielectric properties of (Na0.5Bi0.5)TiO3–SrTiO3 thick films derived from polyvinylpyrrolidone-modified chemical solution

Effect of pore content on diffuse phase transition behaviour of porous 0.5BaZr0.2Ti0.8O3–0.5Ba0.7Ca0.3TiO3 ceramics

Ultralow Loss and High Tunability in a Non‐perovskite Relaxor Ferroelectric

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