共 48 条
Diversiform electrical and thermal expansion properties of (1-x)Ba0.95Ca0.05Ti0.94Zr0.06O3-(x)Dy lead-free piezoelectric ceramics influenced by defect complexes
被引:16
作者:
Tian, Yongshang
[1
]
Li, Shuiyun
[1
]
Li, Youyang
[1
]
Gong, Yansheng
[2
]
Ji, Xiang
[3
,4
]
Sun, Shujie
[1
]
Jing, Qiangshan
[1
]
机构:
[1] Xinyang Normal Univ, Coll Chem & Chem Engn, Henan Prov Key Lab Utilizat Nonmetall Mineral Sou, Xinyang 464000, Peoples R China
[2] China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China
[3] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430074, Hubei, Peoples R China
[4] Tokyo Inst Technol, Sch Mat & Chem Technol, Tokyo 1528552, Japan
关键词:
FREE PIEZOCERAMICS;
LOW-TEMPERATURE;
SINTERING TEMPERATURE;
FERROELECTRIC CERAMICS;
MICROSTRUCTURE;
STABILITY;
PERMITTIVITY;
COEFFICIENT;
BATIO3;
RAMAN;
D O I:
10.1007/s10853-018-2428-8
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
(1 - x)Ba0.95Ca0.05Ti0.94Zr0.06O3-(x)Dy (x = 0-0.90 mol%) lead-free ceramics were prepared at 1190 A degrees C with as-synthesized nanoparticles via a modified Pechini polymeric precursor method. X-ray powder diffraction, Raman spectrometer, and X-ray photoelectron spectroscopy were used to investigate the phase, symmetry, and valence state, respectively. The results indicated dysprosium could induce the phase transformation from O to R. The mechanism of defect complexes and oxygen vacancies that influenced by various dysprosium contents were discussed in detail. The results of dielectric, ferroelectric, and piezoelectric characteristics suggested the electrical properties were initially elevated with a trifling addition of dysprosium contents, and then decreased with further increased x. Moreover, reasons for diversified electrical properties, i.e., imbalanced long-range and short-range forces, changed octahedron structure, defect dipole, pinching effects of domain wall and element electronegative, were all stated in detail. The optimal physical properties, d (33) = 371 pC/N, Q (m) = 87, and CTE2 = 1.23 x 10(-5) K-1, were detected at x = 0.60 mol%, and those findings were regarded as prospect in the development of lead-free ferroelectric ceramic materials.
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页码:11228 / 11241
页数:14
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