Dielectric and piezoelectric properties of textured Sr0.53Ba0.47Nb2O6 ceramics prepared by templated grain growth

2002 ◽  
Vol 17 (9) ◽  
pp. 2399-2409 ◽  
Author(s):  
Cihangir Duran ◽  
Susan Trolier-McKinstry ◽  
Gary L. Messing
Keyword(s):  
Single Crystal ◽  
Grain Growth ◽  
Grain Orientation ◽  
Remanent Polarization ◽  
Piezoelectric Properties ◽  
Templated Grain Growth ◽  
Saturation Polarization ◽  
Textured Ceramics ◽  
Dielectric And Piezoelectric Properties ◽  
Piezoelectric Charge

Fiber textured Sr0.53Ba0.47Nb2O6 ceramics were reactively sintered to ≥95% of the theoretical density from a mixture of SrNb2O6 and BaNb2O6 powders. Texture in 〈001〉 was obtained by templated grain growth on 〈001〉-oriented acicular KSr2Nb5O15 template particles. The most highly textured ceramics had a peak dielectric constant of 23,600 (at Tc = 128 °C), a remanent polarization (Pr) of 20.3 µC/cm2, a saturation polarization (Psat) of 24 µC/cm2 (69–96% of single crystal), and a piezoelectric charge coefficient (d33) of 84 pC/N (76–93% of single crystal). A model, correlating polarization with grain orientation, predicts that Pr increases sharply when a percolating grain network forms to transfer charge between elongated grains.

Piezoelectric Properties in Textured Ceramics of SrBi2Nb2O9

2006 ◽  
Vol 320 ◽  
pp. 15-18 ◽  
Author(s):  
Takuya Sawada ◽  
Hirozumi Ogawa ◽  
Masahiko Kimura ◽  
Kosuke Shiratsuyu ◽  
Akira Ando
Keyword(s):  
Resonant Frequency ◽  
Grain Growth ◽  
Coupling Coefficient ◽  
Remanent Polarization ◽  
Vibration Mode ◽  
Piezoelectric Properties ◽  
Templated Grain Growth ◽  
Orientation Degree ◽  
Mechanical Coupling ◽  
Textured Ceramics

A study has been done for the piezoelectric properties in texured ceramics of SrBi2Nb2O9 (SBN) fabricated by the templated grain growth (TGG) method. Remanent polarization along to the stacking direction increased with the orientation degrees. That corresponds to the increases in electro-mechanical coupling coefficient with orientation degree. The temperature coefficient of the resonant frequency (TCF) in thickness sheer vibration mode changed from negative to positive with increasing orientation degrees, and an excellent TCF of -0.4 ppm/°C was obtained for the specimen with an orientation degree of 76%.

SINGLE CRYSTAL GROWTH AND TEXTURING OF LEAD-BASED PIEZOELECTRIC CERAMICS VIA TEMPLATED GRAIN GROWTH PROCESS

2008 ◽  
Vol 01 (02) ◽  
pp. 127-132 ◽  
Author(s):  
THOMAS RICHTER ◽  
CARSTEN SCHUH ◽  
RALF MOOS ◽  
ENDER SUVACI
Keyword(s):  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystals ◽  
Grain Growth ◽  
High Performance ◽  
Piezoelectric Materials ◽  
Secondary Recrystallization ◽  
Single Crystal Growth ◽  
Templated Grain Growth ◽  
Textured Ceramics

In the field of high-performance piezoelectric materials, PMN-PT single crystals and textured ceramics have been attracting increased research interest for several years. On the other hand, the growth of single crystals from melt for PZT-based compositions is impossible due to its incongruent melting behavior. In order to obtain the characteristics of pure single crystal PZT as closely as possible, the PZT must be textured by secondary recrystallization of introduced seeds in a fine-grained matrix. Zirconium was therefore added to a PMN-PT-ceramic with 32 mol% PT ( Pb ( Mg 1/3 Nb 2/3)0.68 Ti 0.32 O 3) in order to obtain a PMN-PZT-ceramic with 37 mol% PT and 21 mol% PZ ( Pb ( Mg 1/3 Nb 2/3)0.42( Ti 0.638 Zr 0.362)0.58 O 3). Initially, the growth mechanism of (001)-oriented BaTiO 3 (BT) single crystals in those matrices was investigated. The piezoelectric single crystals were produced via a process that starts with the hot pressing of a BT single crystal in cold isostatically pressed ceramics, followed by an additional sintering step in order to achieve a secondary recrystallization. The measured growth lengths in PMN-PT and PMN-PZT matrices were up to 140 μm and 65 μm, respectively. Having developed this understanding, both ceramics were textured via the templated grain growth (TGG) process by using (001)-oriented BT templates. Sintering of templated grain bodies resulted in template growth into the matrix to produce textured ceramics with Lotgering factors up to 0.99 for both compositions. In textured samples unipolar strain s33 was enhanced by a factor of up to 1.8 compared to randomly oriented ceramics. By contrast, BT single crystal growth in an alternative PZT matrix with NdMn doping was not successful. Hence, in the present work, growth experiments in this NdMn -doped PZT were first performed using PZT fibers of similar composition as seeds. Growth of the fiber diameter of up to 100 μm was observed in that matrix.

scholarly journals Dielectric and Piezoelectric Properties of Textured Lead-Free Na0.5Bi0.5TiO3-Based Ceramics

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 206 ◽  
Author(s):  
Nannan Dong ◽  
Xiaoyi Gao ◽  
Fangquan Xia ◽  
Hanxing Liu ◽  
Hua Hao ◽  
...  
Keyword(s):  
Grain Orientation ◽  
Applied Field ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Large Signal ◽  
Lower Strain ◽  
Textured Ceramics ◽  
Domain Configuration ◽  
Template Grain Growth ◽  
Dielectric And Piezoelectric Properties

This work provides a comparative study of the dielectric and piezoelectric properties of randomly oriented and textured 0.88Na0.5Bi0.5TiO3-0.08K0.5Bi0.5TiO3-0.04BaTiO3 (88NBT) ceramics. Textured ceramics were fabricated by template grain growth (TGG) method using NaNbO3 (NN) for templates. For textured ceramics with 4 wt% NN templates, a Lotgering factor of 96% and piezoelectric coefficient d33 of 185 pC/N were obtained. Compared to the randomly oriented ceramics, textured ceramics show lower strain hysteresis (H = 7.6%), higher unipolar strain of 0.041% with corresponding large signal piezoelectric coefficient d33* of 200 pm/V at applied field of 2 kV/mm. This enhancement can be explained by the grain orientation along <001> direction by texturing, where an engineered domain configuration is formed after polarization, leading to decreased hysteresis and increased piezoelectric property.

Templated grain growth and piezoelectric properties of 〈001〉-textured PIN–PMN–PT ceramics

2015 ◽  
Vol 30 (14) ◽  
pp. 2144-2150 ◽  
Author(s):  
Dan-dan Wei ◽  
Qi-bin Yuan ◽  
Gao-qun Zhang ◽  
Hong Wang
Keyword(s):  
Grain Growth ◽  
Piezoelectric Properties ◽  
Templated Grain Growth ◽  
Image Position

Abstract

Preparation of [110] Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method and Their Piezoelectric Properties

2007 ◽  
Vol 46 (10B) ◽  
pp. 7039-7043 ◽  
Author(s):  
Satoshi Wada ◽  
Kotaro Takeda ◽  
Tomomitsu Muraishi ◽  
Hirofumi Kakemoto ◽  
Takaaki Tsurumi ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Grain Growth ◽  
Piezoelectric Properties ◽  
Templated Grain Growth ◽  
Growth Method ◽  
Titanate Ceramics

Enhanced piezoelectric properties in textured NaNbO3–BaTiO3–SrZrO3 ceramics by templated grain growth

2020 ◽  
Vol 843 ◽  
pp. 155865 ◽  
Author(s):  
Dou Zhang ◽  
Shaofeng Zhang ◽  
Xi Yuan ◽  
Xuefan Zhou ◽  
He Qi ◽  
...  
Keyword(s):  
Grain Growth ◽  
Piezoelectric Properties ◽  
Templated Grain Growth

Effects of Starting Materials on Molten Salt Synthesis of Bi4Ti3O12

2008 ◽  
Vol 55-57 ◽  
pp. 165-168
Author(s):  
Paisan Setasuwon ◽  
S. Kijamnajsak
Keyword(s):  
Molten Salt ◽  
Grain Growth ◽  
Grain Orientation ◽  
Crystal Size ◽  
Raw Materials ◽  
Piezoelectric Materials ◽  
Molten Salt Synthesis ◽  
Chloride Salt ◽  
Templated Grain Growth

Na0.5Bi0.5TiO3 is one of the potential candidates for non-lead piezoelectric materials to replace existing lead-based ones. Properties of BNT could be enhanced by reactive templated grain growth (RTGG) technique through induction of grain orientation with crystals of Bi4Ti3O12. Controlling the size of Bi4Ti3O12 crystals during the synthesis with molten salt is a major factor in optimizing RTGG. It was found that molten salt synthesis of Bi4Ti3O12 crystals with NaCl-KCl yielded larger particles, compared with Na2SO4-3K2SO4. Varying the proportion of chloride salt did not produce noticeable changes in crystal size. Bi4Ti3O12 crystals were significantly affected by raw materials treatment. Non-milling of starting powders could approximately double the crystal size

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