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- Publications
- Influence
Exceptionally High Piezoelectric Coefficient and Low Strain Hysteresis in Grain-Oriented (Ba, Ca)(Ti, Zr)O3 through Integrating Crystallographic Texture and Domain Engineering.
- Y. Liu, Yunfei Chang, +6 authors W. Cao
- Materials Science, Medicine
- ACS applied materials & interfaces
- 22 August 2017
Both low strain hysteresis and high piezoelectric performance are required for practical applications in precisely controlled piezoelectric devices and systems. Unfortunately, enhanced piezoelectric… Expand
Templated Grain Growth in Macroporous Materials
- Florian Bouville, E. Portuguez, +5 authors S. Deville
- Materials Science, Physics
- 1 June 2014
We demonstrate a facile method to produce crystallographically textured, macroporous materials using a combination of modified ice templating and templated grain growth (TGG). The process is… Expand
Microstructure, Density, and Dielectric Properties of Lead‐Free (K0.44Na0.52Li0.04)(Nb0.96−xTaxSb0.04)O3 Piezoelectric Ceramics
- Yunfei Chang, Zupei Yang, Lingling Wei
- Chemistry
- 1 May 2007
Lead-free (K0.44Na0.52Li0.04) (Nb0.96−xTaxSb0.04)O3 piezoelectric ceramics were prepared by the conventional solid-state sintering method. The grain growth of the ceramics was inhibited and the… Expand
⟨001⟩ textured (K0.5Na0.5)(Nb0.97Sb0.03)O3 piezoelectric ceramics with high electromechanical coupling over a broad temperature range
- Yunfei Chang, S. F. Poterala, Zupei Yang, S. Trolier-McKinstry, G. Messing
- Physics
- 8 December 2009
⟨001⟩-oriented (K0.5Na0.5)(Nb0.97Sb0.03)O3 (KNNS) ceramics with a narrow orientation distribution (full width at half maximum=7.0°) were produced by templated grain growth using NaNbO3 templates.… Expand
Mechanistic Interpretation of the Aurivillius to Perovskite Topochemical Microcrystal Conversion Process
- S. F. Poterala, Yunfei Chang, T. Clark, R. Meyer, G. Messing
- Materials Science
- 4 February 2010
The kinetics of topochemical and morphological conversion of platelet-shaped Na3.5Bi2.5Nb5O18, PbBi4Ti4O15, and BaBi4Ti4O15 Aurivillius phases to NaNbO3, PbTiO3, and BaTiO3 perovskites were studied.… Expand
Structure, microstructure and electrical properties of (1 − x − y)Bi0.5Na0.5TiO3–xBi0.5K0.5TiO3–yBi0.5Li0.5TiO3 lead-free piezoelectric ceramics
- Zupei Yang, Yuting Hou, H. Pan, Yunfei Chang
- Materials Science
- 8 July 2009
Abstract The ternary system (1 − x − y )Bi 0.5 Na 0.5 TiO 3 – x Bi 0.5 K 0.5 TiO 3 – y Bi 0.5 Li 0.5 TiO 3 (abbreviated to BNKLT- x / y ) was synthesized by conventional oxide-mixed method. The… Expand
Effects of AETiO3 additions on phase structure, microstructure and electrical properties of (K0.5Na0.5)NbO3 ceramics
- Yunfei Chang, Zupei Yang, L. Wei, B. Liu
- Materials Science
- 15 November 2006
Abstract Lead-free piezoelectric ceramics with the composition of (K 0.5 Na 0.5 )NbO 3 (KNN) and 0.995(K 0.5 Na 0.5 )NbO 3 –0.005AETiO 3 (AE = Mg, Ca, Sr, Ba) were successfully prepared by… Expand
Enhanced Electromechanical Properties and Temperature Stability of Textured (K0.5Na0.5)NbO3‐Based Piezoelectric Ceramics
- Yunfei Chang, S. F. Poterala, Zu-pei Yang, G. Messing
- Materials Science
- 1 August 2011
In this work, we report the electromechanical properties of 〈00l〉C-textured (K0.5Na0.5)0.98Li0.02NbO3 (KNLN) and (K0.5Na0.5)(Nb0.85Ta0.15)O3 (KNNT) ceramics produced by templated grain growth. Both… Expand
Fabrication of Highly Textured Fine‐Grained α‐Alumina by Templated Grain Growth of Nanoscale Precursors
- Yunfei Chang, S. F. Poterala, D. O. Yener, G. Messing
- Materials Science
- 1 May 2013
[0001] textured alumina ceramics with a fine grain size were fabricated between 1400°C and 1600°C via templated grain growth (TGG) using fine alumina platelets (~0.6 and ~3 μm diameter) aligned by… Expand
Synthesis and morphology of anisotropic NaNbO3 seed crystals
- Yunfei Chang, Zupei Yang, X. Chao, Z. Liu, Z. Wang
- Materials Science
- 15 October 2008
Abstract Large platelet NaNbO3 (NN) seed crystals have been successfully synthesized from bismuth layer-structured ferroelectric Bi2.5Na3.5Nb5O18 (BNN) precursor by topochemical microcrystal… Expand