Dielectric and electromechanical properties of barium titanate single crystals grown by templated grain growth

2000 ◽  
Vol 47 (4) ◽  
pp. 895-902 ◽  
Author(s):  
P.W. Rehrig ◽  
S. Trolier-McKinstry ◽  
Seung-Eek Park ◽  
G.L. Messing
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Grain Growth ◽  
Electromechanical Properties ◽  
Templated Grain Growth

Templated Grain Growth of Barium Titanate Single Crystals

2004 ◽  
Vol 83 (11) ◽  
pp. 2654-2660 ◽  
Author(s):  
Paul W. Rehrig ◽  
Gary L. Messing ◽  
Susan Trolier-McKinstry
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Grain Growth ◽  
Templated Grain Growth

Piezoelectric properties of zirconium-doped barium titanate single crystals grown by templated grain growth

1999 ◽  
Vol 86 (3) ◽  
pp. 1657-1661 ◽  
Author(s):  
Paul W. Rehrig ◽  
Seung-Eek Park ◽  
Susan Trolier-McKinstry ◽  
Gary L. Messing ◽  
Beth Jones ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Single Crystals ◽  
Grain Growth ◽  
Piezoelectric Properties ◽  
Templated Grain Growth ◽  
Doped Barium Titanate

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

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 Giant Grain Growth in (K,Na)NbO3 Ceramics

Ceramist ◽  
2021 ◽  
Vol 24 (3) ◽  
pp. 286-294
Author(s):  
Seonhwa Park ◽  
Jung Woo Lee ◽  
Kyung-Hoon Cho ◽  
Yuho Min ◽  
Cheol-Woo Ahn
Keyword(s):  
Single Crystal ◽  
Molten Salt ◽  
Single Crystals ◽  
Grain Growth ◽  
Abnormal Grain Growth ◽  
Molten Salt Synthesis ◽  
Topochemical Reaction ◽  
Templated Grain Growth ◽  
Interesting Phenomenon

In this manuscript, an interesting phenomenon is reported. It has been reported that the growth of single crystals is observed in donor-doped (K,Na)NbO3 (KNN)-based ceramics. It is very interesting that the growth happens without the addition of a seed. The growth of huge grains (single crystal, approximately 30 mm,) occurs due to the abnormal grain growth (AGG) in KNN-based ceramics. In the AGG compositions, moreover, the seed plates can be synthesized by not topochemical reaction but simple molten salt synthesis (SMSS) which is a simple-and-cheap process. They can be a good candidate for the seeds at reactive templated grain growth (RTGG) or templated grain growth (TGG) process.

Microstructure Control of Barium Titanate Grain-Oriented Ceramics and their Piezoelectric Properties

2011 ◽  
Vol 485 ◽  
pp. 77-80 ◽  
Author(s):  
Rintaro Mori ◽  
Ichiro Fujii ◽  
Hiroshi Hayashi ◽  
Yoshitaka Nagamori ◽  
Yuichi Yamamoto ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Grain Growth ◽  
Treatment Program ◽  
Piezoelectric Properties ◽  
Domain Size ◽  
Piezoelectric Constant ◽  
Templated Grain Growth ◽  
Microstructure Control ◽  
The Relationship

The Barium titanate (BaTiO3, BT) [110] grain-oriented ceramics along [110] direction were prepared by a templated grain growth (TGG) method. The [110] oriented BT platelike particles (t-BT) were used as template particles. The relationship between poling treatment program and piezoelectric constant was investigated. The change in the poling conditions did not greatly influence domain size and the piezoelectric constant. The relationship between piezoelectric properties and domain size in BT grain-oriented ceramics was investigated. The smaller domain size was required to increase the piezoelectric constant.

Preparation of Barium Titanate Grain-Oriented Ceramics and their Piezoelectric Properties

2010 ◽  
Vol 445 ◽  
pp. 3-6 ◽  
Author(s):  
Rintaro Mori ◽  
Petr Pulpan ◽  
Hiroshi Hayashi ◽  
Yoshitaka Nagamori ◽  
Yuichi Yamamoto ◽  
...  
Keyword(s):  
Grain Size ◽  
Barium Titanate ◽  
Relative Density ◽  
Grain Growth ◽  
Piezoelectric Properties ◽  
Templated Grain Growth ◽  
Grain Sizes ◽  
Degree Of Orientation ◽  
High Degree ◽  
The Relationship

Barium titanate (BaTiO3, BT) grain-oriented ceramics along [110] direction were prepared by a templated grain growth (TGG) method. The [110] oriented BT platelike particles (t-BT) were used as template particles. BT grain-oriented ceramics with higher relative density (Drel) over 95 %, high degree of orientation along [110] direction (F110) over 80 % and grain sizes around 30 µm were successfully prepared using only the template particles. The relationship between microstructures and piezoelectric constant (d33) was investigated. The higher F110 was, the higher Drel and the smaller grain size were required for enhancement of the piezoelectric properties.

Microstructure development and piezoelectric properties of highly textured CuO-doped KNN by templated grain growth

2010 ◽  
Vol 25 (4) ◽  
pp. 687-694 ◽  
Author(s):  
Yunfei Chang ◽  
Stephen F. Poterala ◽  
Zupei Yang ◽  
Susan Trolier-McKinstry ◽  
Gary L. Messing
Keyword(s):  
Grain Growth ◽  
Piezoelectric Properties ◽  
Microstructure Development ◽  
Electromechanical Properties ◽  
Templated Grain Growth ◽  
Polymorphic Phase Transition ◽  
Rocking Curve ◽  
Tan Δ ◽  
Reactive Matrix ◽  
Piezoelectric Performance

This paper demonstrates the production of 〈00l〉-oriented CuO-doped (K0.476Na0.524)NbO3 (KNN) piezoelectric ceramics with a polymorphic phase transition (PPT) temperature greater than 180 °C by templated grain growth (TGG) using high aspect ratio NaNbO3 template particles. A novel (to the KNN system) two-step sintering and annealing process combined with CuO doping is demonstrated to improve density and maximize texture quality (F00l = 99% and rocking curve FWHM = 6.9°) in textured KNN ceramics. The best electromechanical properties (kp ≈ 0.58, k31 ≈ 0.33, d33 ≈ 146 pC/N, To-t ≈ 183 °C, Tc ≈ 415 °C, εr = 202, and tan δ = 0.016) are achieved in 1 mol% CuO-doped KNN with F00l = 99% and a relative density of 96.3%. The values of d33, kp, and k31 are 70–90% higher than randomly oriented ceramics and are obtained without a significant reduction in the PPT temperature, resulting in stable piezoelectric performance over a wide temperature range (−50 to 180 °C). These results show that high-quality textured KNN can be obtained by TGG and that a reactive matrix is unnecessary.

Processing, Structural and Electrical Properties of Textured Potassium Strontium Niobate (Ksr2Nb5O15) Piezoceramic Fibers

2012 ◽  
Vol 445 ◽  
pp. 481-486 ◽  
Author(s):  
Sinan Dursun ◽  
Sedat Alkoy
Keyword(s):  
Dielectric Constant ◽  
Electrical Properties ◽  
Grain Growth ◽  
Ceramic Fibers ◽  
Electromechanical Properties ◽  
Templated Grain Growth ◽  
Structural And Electrical Properties ◽  
Potassium Strontium Niobate ◽  
Piezoelectric Charge ◽  
Electric Field Induced Strain

Highly [00 textured KSr2Nb5O15 (KSN) ceramic fibers were fabricated by a combination of novel alginate gelation method and templated grain growth using acicular KSr2Nb5O15 template particles. Fibers were drawn from alginate based slurries without or with 25 and 100wt% KSN template particles. A texture fraction of 0.90 was obtained in the case of 25 wt% and a single crystal like texture was obtained in the case of 100wt%. Piezocomposites with 1-3 connectivity were prepared from the KSN fibers and their electrical and electromechanical properties were investigated. Dielectric constant of 140, piezoelectric charge coefficient of 45 pC/N, remnant polarization of 16.6 μC/cm2 and electric field induced strain of up to 0.035% were obtained from piezocomposites with textured fibers.

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