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Colossal Volume Contraction in Strong Polar Perovskites of Pb(Ti,V)O3.
Pan, Zhao; Chen, Jun; Jiang, Xingxing; Hu, Lei; Yu, Runze; Yamamoto, Hajime; Ogata, Takahiro; Hattori, Yuichiro; Guo, Fangmin; Fan, Xi'an; Li, Yawei; Li, Guangqiang; Gu, Huazhi; Ren, Yang; Lin, Zheshuai; Azuma, Masaki; Xing, Xianran.
Afiliación
  • Pan Z; Department of Physical Chemistry, University of Science and Technology Beijing , Beijing 100083, China.
  • Chen J; State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan 430081, China.
  • Jiang X; Materials and Structures Laboratory, Tokyo Institute of Technology , 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan.
  • Hu L; Department of Physical Chemistry, University of Science and Technology Beijing , Beijing 100083, China.
  • Yu R; Materials and Structures Laboratory, Tokyo Institute of Technology , 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan.
  • Yamamoto H; Center for Crystal R&D, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
  • Ogata T; Department of Physical Chemistry, University of Science and Technology Beijing , Beijing 100083, China.
  • Hattori Y; Materials and Structures Laboratory, Tokyo Institute of Technology , 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan.
  • Guo F; Materials and Structures Laboratory, Tokyo Institute of Technology , 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan.
  • Fan X; Materials and Structures Laboratory, Tokyo Institute of Technology , 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan.
  • Li Y; Materials and Structures Laboratory, Tokyo Institute of Technology , 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan.
  • Li G; X-Ray Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
  • Gu H; State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan 430081, China.
  • Ren Y; State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan 430081, China.
  • Lin Z; State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan 430081, China.
  • Azuma M; State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology , Wuhan 430081, China.
  • Xing X; X-Ray Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
J Am Chem Soc ; 139(42): 14865-14868, 2017 10 25.
Article en En | MEDLINE | ID: mdl-28994586
The unique physical property of negative thermal expansion (NTE) is not only interesting for scientific research but also important for practical applications. Chemical modification generally tends to weaken NTE. It remains a challenge to obtain enhanced NTE from currently available materials. Herein, we successfully achieve enhanced NTE in Pb(Ti1-xVx)O3 by improving its ferroelectricity. With the chemical substitution of vanadium, lattice tetragonality (c/a) is highly promoted, which is attributed to strong spontaneous polarization, evidenced by the enhanced covalent interaction in the V/Ti-O and Pb-O2 bonds from first-principles calculations. As a consequence, Pb(Ti0.9V0.1)O3 exhibits a nonlinear and much stronger NTE over a wide temperature range with a volumetric coefficient of thermal expansion αV = -3.76 × 10-5/°C (25-550 °C). Interestingly, an intrinsic giant volume contraction (∼3.7%) was obtained at the composition of Pb(Ti0.7V0.3)O3 during the ferroelectric-to-paraelectric phase transition, which represents the highest value ever reported. Such volume contraction is well correlated to the effect of spontaneous volume ferroelectrostriction. The present study extends the scope of the NTE family and provides an effective approach to explore new materials with large NTE, such as through adjusting the NTE-related ferroelectric property in the family of ferroelectrics.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos