|
1
|
Wang L, Hu L, He J, Da L. Band gap structure - Lewis acid/base feature correlation for potassium/sodium polyniobates and polytitanates. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2023.123855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
|
2
|
Pan Z, Takehiro K, Nishikubo T, Hu L, Liu Q, Sakai Y, Kawaguchi S, Azuma M. Realization of Negative Thermal Expansion in Lead-Free Bi 0.5K 0.5VO 3 by the Suppression of Tetragonality. Inorg Chem 2022; 61:3730-3735. [PMID: 35148105 DOI: 10.1021/acs.inorgchem.1c03960] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bi1/2K1/2VO3 is a lead-free PbTiO3-type compound with a tetragonality (c/a = 1.054) comparable to that of typical ferroelectric PbTiO3 (c/a = 1.064) with negative thermal expansion (NTE) during the tetragonal-to-cubic phase transition; therefore, Bi1/2K1/2VO3 is a potential lead-free NTE material if its metastable perovskite structure can be maintained at high temperatures. In the present experiment, electron doping in Bi1/2K1/2VO3 was conducted through substituting K+ with La3+ to suppress the tetragonality and achieve NTE. La substitution successfully suppressed the tetragonality of Bi1/2K1/2VO3 and also improved its thermal stability. Moreover, both composition- and temperature-induced tetragonal-to-cubic phase transitions occurred. In particular, a large volume shrinkage with a large negative thermal coefficient of expansion (CTE) was obtained for Bi0.5K0.46La0.04VO3 during the tetragonal-to-cubic phase transition (ΔV = -0.66%). Hence, this study extends the NTE family and also sheds light on the exploration of lead-free piezoelectric materials with controllable thermal expansion.
Collapse
Affiliation(s)
- Zhao Pan
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan
| | - Koike Takehiro
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan
| | - Takumi Nishikubo
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan.,Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan
| | - Lei Hu
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan
| | - Qiumin Liu
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan
| | - Yuki Sakai
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan.,Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan
| | - Shogo Kawaguchi
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), Spring-8, 1-1-1 Kouto, Sayo-gun, Hyo̅go 679-5198, Japan
| | - Masaki Azuma
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama, Kanagawa 226-8503, Japan.,Kanagawa Institute of Industrial Science and Technology, 705-1 Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan
| |
Collapse
|
|
3
|
Abstract
(1 - x)PbVO3-xBiCoO3 solid solutions with 0 ≤ x ≤ 1 were prepared at a high pressure of 5-6 GPa and a high temperature of 1223-1473 K. They adopt a polar tetragonal P4mm structure for the 0 ≤ x ≤ 0.3 and 0.75 ≤ x ≤ 1 ranges with giant tetragonal distortions and a cubic Pm3̅m structure for the 0.4 ≤ x ≤ 0.7 range. High-temperature structural studies with synchrotron X-ray powder diffraction showed that polarization, calculated by the point-charge model, and the tetragonal distortion remained nearly constant in the x = 0.8 sample from 295 K up to the decomposition temperature of about 700 K. Magnetic and differential scanning calorimetry measurements showed that the Néel temperature, TN, nearly linearly decreased from 470 K for x = 1 to 250 K for x = 0.75 (with TN = 395 K for x = 0.9 and TN = 295 K for x = 0.8). Long-range magnetic ordering also takes place at TN = 44 K for x = 0. All other samples with 0.1 ≤ x ≤ 0.7 demonstrated spin-glass-like magnetic properties and notably reduced Weiss temperatures. Effective magnetic moments estimated for the x = 0.6, 0.65, and 0.7 cubic samples gave evidence that cobalt is present in the +2 and +3 oxidation states, and Co3+ cations take the low-spin state.
Collapse
Affiliation(s)
- Alexei A Belik
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
| |
Collapse
|
|
4
|
Yang T, Lin K, Li Q, Wang Y, Gu L, Wang N, Deng J, Chen J, Xing X. Evidence of the enhanced negative thermal expansion in (1 − x)PbTiO 3- xBi(Zn 2/3Ta 1/3)O 3. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01694e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enhanced polarization displacement in (1 − x)PbTiO3-xBi(Zn2/3Ta1/3)O3 solutions has been reported.
Collapse
Affiliation(s)
- Tao Yang
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| | - Kun Lin
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| | - Qiang Li
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| | - Yilin Wang
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics
- Institute of Physics
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Na Wang
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| | - Jinxia Deng
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| | - Jun Chen
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| | - Xianran Xing
- Institute of Solid State Chemistry
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- and University of Science and Technology Beijing
- Beijing 100083
| |
Collapse
|