Texture Development in Na1/2Bi1/2TiO3-BaTiO3 Ceramics by Reactive-Templated Grain Growth

2007 ◽  
Vol 336-338 ◽  
pp. 121-124
Author(s):  
Yong Ke Yan ◽  
He Ping Zhou ◽  
Wei Zhao ◽  
Dan Liu ◽  
Shan Shan Liu
Keyword(s):  
Molten Salt ◽  
Grain Growth ◽  
Microstructure Evolution ◽  
Grain Orientation ◽  
Texture Development ◽  
Molten Salt Method ◽  
Templated Grain Growth ◽  
Important Impact

High <001>-textured Na1/2Bi1/2TiO3-BaTiO3 (6mol%BaTiO3) ceramics were fabricated by reactive-templated grain growth (RTGG), using plate-like Bi4Ti3O14 particles prepared by a molten salt method as the templates. The effect of template concentration on the texture development and microstructure evolution was studied, and the mechanisms of grain orientation and densification were also discussed. The design of Bi element reaction has important impact on the texture development.

Fabrication of Textured SrBi2Nb2O9 Ceramics by Templated Grain Growth

2007 ◽  
Vol 26-28 ◽  
pp. 239-242 ◽  
Author(s):  
Chun Wei Cui ◽  
Jin Liang Huang ◽  
Lin Hua Gao ◽  
Xing Hua Yang ◽  
Xiao Wang
Keyword(s):  
Relative Density ◽  
Molten Salt ◽  
Grain Growth ◽  
Grain Orientation ◽  
Sintering Temperature ◽  
Molten Salt Method ◽  
Templated Grain Growth ◽  
Increasing Temperature ◽  
Lotgering Factor ◽  
Peak Value

Textured SrBi2Nb2O9 (SBN) ceramics were fabricated by templated grain growth (TGG) method. The plated-like SBN particles with shape anisotropy prepared by molten salt method were used as the templates. The SBN powders prepared by conventional solid (CS) reaction were used as matrix powders. It was found that the textured SBN ceramics can be obtained by TGG method. The grain orientation (Lotgering factor, f) increased with the increase of sintering temperature and content of the templates. The textured SBN ceramics with f=0.86 could then be obtained after sintering at 1300 °C for 3 h with 20wt.% templates. The relative density keeps rising with increasing temperature until it reaches a peak value 91.22% at the sintering temperature 1300°C, after which it decreases.

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

Preparation and Characterization of High Textured KSr2Nb5O15 Lead-Free Piezoelectric Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 1905-1907
Author(s):  
Li Jin Xie ◽  
Gao Jie Xu ◽  
Zhi Xiang Li
Keyword(s):  
Solid State ◽  
Molten Salt ◽  
Grain Orientation ◽  
Sintered Density ◽  
Raw Materials ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Molten Salt Method ◽  
Templated Grain Growth

Anisometric KSr2Nb5O15 (KSN) particles were synthesized by molten salt method with SrCO3, Nb2O5 and KCl as raw materials. With K2CO3, SrCO3 and Nb2O5 starting materials, KSN lead-free piezoelectric ceramics were prepared by conventional ceramics technique and reactive templated grain growth (RTGG) method, respectively. In the RTGG process, green compacts were fabricated by tapecasting using anisometric KSN as template particles. The KSN particles prepared by molten salt method were rodlike in shape and dense. The KSN ceramics prepared by RTGG not only had higher degree of grain orientation but higher sintered density compared with that prepared by solid-state reaction.

Texture Development in KSr2Nb5O15 Ceramics Fabricated by Reactive Templated Grain Growth

2004 ◽  
Vol 264-268 ◽  
pp. 1285-1288 ◽  
Author(s):  
K. Yurdal ◽  
Cihangir Duran ◽  
S. Alkoy ◽  
H.I. Bakan
Keyword(s):  
Grain Growth ◽  
Texture Development ◽  
Templated Grain Growth

Computational study of textured ferroelectric polycrystals: Texture development during templated grain growth

2017 ◽  
Vol 121 (6) ◽  
pp. 064108 ◽  
Author(s):  
Jie E. Zhou ◽  
Yongke Yan ◽  
Shashank Priya ◽  
Yu U. Wang
Keyword(s):  
Grain Growth ◽  
Computational Study ◽  
Texture Development ◽  
Templated Grain Growth

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.

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