Fabrication of [100]-oriented bismuth sodium titanate ceramics with small grain size and high density for piezoelectric materials

Hu, Dengwei; Mori, Kazuki; Kong, Xingang; Shinagawa, Kazunari; Wada, Satoshi; Feng, Qi

doi:10.1016/j.jeurceramsoc.2013.11.031

Cited by 40 publications

(23 citation statements)

References 48 publications

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“…3), 20) Yilmaz et al 3) reported on the c-axis orientation of BNBT (x < 0.065) following templated grain growth achieved by using tabular SrTiO 3 template particles. The piezoelectric coefficient d 33 was 500 pC N ¹1 , and this value was driven by the high electric fields.…”

Section: Introductionmentioning

confidence: 99%

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi0.5, Na0.5)1−xBaxTiO3 ceramic system

Tanaka

Sano

Harada

et al. 2018

J. Ceram. Soc. Japan

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Crystal-oriented (Bi 0.5 , Na 0.5 ) 1¹x Ba x TiO 3 (BNBT), (x = 0.10.25) ceramics with a perovskite crystal structure were prepared by colloidal processing in a strong rotating magnetic field with the aim of improving their piezoelectric properties. The advantages of increasing the amount of Ba in these ceramics are twofold; specifically, this will lead to anisotropic crystal lattices and it will also increases the tetragonality. The crystaloriented BNBT (x = 0.10.25) ceramics were prepared by using a rotating magnetic field to orient the a-and caxes of the crystal in the powder compact. The degree of orientation also increased with the tetragonality. The phase transformation that occurred above Curie temperature during sintering redistributed the c-axis-oriented structure along both the a-and c-axes. Again, the c-axis orientation was enhanced by electrical field polarization. The piezoelectric d 33 constant, which depended on the Ba content, achieved a maximum value of 122 pC N ¹1 at a Ba content of 15 mol %.

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Section: Introductionmentioning

confidence: 99%

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi0.5, Na0.5)1−xBaxTiO3 ceramic system

Tanaka

Sano

Harada

et al. 2018

J. Ceram. Soc. Japan

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“…A point to be obtained from Table 3 is that the increases in the piezoelectric response of lead-free textured ceramics appear to be more significant in systems with closer composition between template and matrix. This can be clearly seen in Table 3 by comparison with different template types for textured Na 0.5 Bi 0.5 TiO 3 -based ceramics [92][93][94][95][96]. Among many reasons for this, the reinforcement of texture degree is one of the most critical.…”

Section: Lead-free Textured Piezoelectric Ceramicsmentioning

confidence: 94%

Progress on the fabrication of lead-free textured piezoelectric ceramics: perspectives over 25 years

Liu

2015

J Mater Sci: Mater Electron

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Further enhancement of the piezoelectric response in lead-free piezoelectric ceramics can be accomplished by inducing preferred orientation. In this paper, attempts have been made to review the progress on the fabrication of lead-free textured piezoelectric ceramics by the (reaction) templated grain growth method. The preparation (molten salt synthesis) and alignment (tape casting and extrusion molding) of anisometric template particles were introduced in detail. The texture evolution with heating was visualized by computer simulation. The review of lead-free textured piezoelectric ceramics focused on four promising systems: Na 0.5 Bi 0.5 TiO 3 -based, K 0.5 Na 0.5 NbO 3 -based, Ba(Zr 0.2 Ti 0.8 )O 3 -(Ba 0.7 Ca 0.3 )TiO 3 and KSr 2 Nb 5 O 15 . It is suggested that texturing of lead-free morphotropic phase boundary compositions will be required in order to realize viable lead-free alternatives to current lead-based materials.

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“…The microstructure observation can explain the origin of these discrepancies. 23),69) The stoichiometric specimen using Bi 4 Ti 3 O 12 has grains with rounded boundaries at 900°C but the grains in the specimen using H 1.07 Ti 1.73 O 4 ·nH 2 O are faceted at 900°C and rounded at 1100°C. This suggests that the grain boundary structure at an atomic level is different by the different route of the reaction between the reactive template and the complementary compounds.…”

Section: Deviation From Stoichiometrymentioning

confidence: 99%

“…23) The TGG and RTGG methods are first applied to structure ceramics, 24), 25) and extended to piezoelectric ceramics with the Aurivillius structure, 26),27) tungsten bronze structure, 28), 29) and perovskite structure. 30) Because materials having the perovskite structure have superior piezoelectric properties, various compounds have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Microstructure development and texture formation in lead-free piezoelectric ceramics prepared by templated grain growth process

Kimura

2016

J. Ceram. Soc. Japan

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Templated and reactive-templated grain growth is a convenient preparation method for textured ceramics. In this method, green compacts composed of aligned template grains and randomly oriented matrix grains are sintered. The matrix grains must be eliminated to obtain highly textured materials and an understanding of the growth behavior for both template and matrix grains is essential to the design of the conditions for effective elimination of matrix grains. This review paper addresses the microstructure development in BaBi 4 Ti 4 O 15 and Bi 4 Ti 3 O 12 prepared by the templated grain growth method and in Bi 0.5 (Na 1¹x K x ) 0.5 -TiO 3 and K 0.5 Na 0.5 NbO 3 textured by the reactive-templated grain growth method. The grains of these materials are faceted, and critical driving force is required for the growth of faceted grains. It is illustrated that the relative magnitude of the driving force of the template grains and the critical driving force determines the mode of grain growth behavior and the microstructure of the final products. A discussion on the grain growth behavior is presented to give the criteria for designing the preparation conditions.

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Fabrication of [100]-oriented bismuth sodium titanate ceramics with small grain size and high density for piezoelectric materials

Cited by 40 publications

References 48 publications

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi<sub>0.5</sub>, Na<sub>0.5</sub>)<sub>1−</sub><i><sub>x</sub></i>Ba<i><sub>x</sub></i>TiO<sub>3</sub> ceramic system

Influence of tetragonality on crystal orientation induced by a strong magnetic field and on the piezoelectric properties of the (Bi<sub>0.5</sub>, Na<sub>0.5</sub>)<sub>1−</sub><i><sub>x</sub></i>Ba<i><sub>x</sub></i>TiO<sub>3</sub> ceramic system

Progress on the fabrication of lead-free textured piezoelectric ceramics: perspectives over 25 years

Microstructure development and texture formation in lead-free piezoelectric ceramics prepared by templated grain growth process

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