Influence of sintering temperature on microstructure and electric properties of CuO doped alkaline niobate-based lead-free ceramics

2012 ◽  
Vol 23 (8) ◽  
pp. 1455-1461 ◽  
Author(s):  
Bin Shao ◽  
Jinhao Qiu ◽  
Kongjun Zhu ◽  
Honghui Gu ◽  
Hongli Ji
Keyword(s):  
Sintering Temperature ◽  
Electric Properties ◽  
Lead Free ◽  
Lead Free Ceramics

scholarly journals Effects of CuO Sintering Aids on Microstructure and Electric Properties for (Na0.48K0.473Li0.04Sr0.007) (Nb0.883Ta0.05Sb0.06Ti0.007)O3 Ceramics

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 935
Author(s):  
Cheng-Shong Hong ◽  
Yuan-Xin Zhang ◽  
Yi-Tian Hong
Keyword(s):  
Oxygen Vacancies ◽  
Energy Harvester ◽  
Domain Walls ◽  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Electric Properties ◽  
Sintering Aids ◽  
Lead Free Ceramics ◽  
Physical Response ◽  
Hard Type

In this paper, the effects of CuO sintering aids on microstructure and electric properties are investigated for the non-stoichiometric (Na0.48K0.473Li0.04Sr0.007)(Nb0.883Ta0.05Sb0.06Ti0.007)O3+x mol% CuO lead free ceramics. As the amounts of CuO equal 1 mol%, the sintering temperature is 975 °C and the piezoelectric parameters are d33 = 200 pC/N, g33 = 38 (10−3 Vm/N), d33 × g33 = 7600 (10−15 m2/N), kp = 0.38, Qm = 240, Pr = 18.93 μC/cm2 and EC = 8.75 kV/cm. The piezoelectric properties are changed to hard type and suitable for energy harvester with multilayer technology. The physical response mechanisms are suggested that the diffused phase transitions are enhanced, the Cu2+ ions substitute for the B-site ions with forming the Oxygen vacancies and the domain walls are pinning.

Low-temperature sintering and electric properties of BCT–BZT and BCZT lead-free ceramics

2015 ◽  
Vol 26 (6) ◽  
pp. 3750-3756 ◽  
Author(s):  
Yongshang Tian ◽  
Yansheng Gong ◽  
Dawei Meng ◽  
Hao Deng ◽  
Boya Kuang
Keyword(s):  
Low Temperature ◽  
Electric Properties ◽  
Lead Free ◽  
Low Temperature Sintering ◽  
Lead Free Ceramics

Electrical Properties of Modified BNT Based Lead-Free Ceramics

2016 ◽  
Vol 872 ◽  
pp. 87-91
Author(s):  
Supalak Manotham ◽  
Tawee Tunkasiri ◽  
Pharatree Jaita ◽  
Pichitchai Butnoi ◽  
Denis Russell Sweatman ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Solid State ◽  
Electrical Properties ◽  
Sintering Temperature ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Second Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lead Free Ceramics

The properties of modified Bi0.5Na0.5TiO3 (BNT) based lead-free ceramics were investigated. The BNT-based ceramics were prepared by a solid-state mixed oxide method Phase formation was determined by X-ray diffraction technique (XRD). The X-ray diffraction analysis of the ceramics suggested that all samples exhibited a perovskite structure without second phase. The value of dielectric constant increased with increasing in sintering temperature. Moreover, high sintering temperatures could improve ferroelectric properties of BNT base lead-free ceramics.

0.99(K0.45Na0.52Li0.03)(Nb1−xSbx)O3–0.01BiScO3 lead-free ceramics with excellent piezoelectric properties and broad sintering temperature

2014 ◽  
Vol 40 (5) ◽  
pp. 7589-7593 ◽  
Author(s):  
Chao Liu ◽  
Dingquan Xiao ◽  
Tao Huang ◽  
Jiagang Wu ◽  
Fangxu Li ◽  
...  
Keyword(s):  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Lead Free ◽  
Lead Free Ceramics

Phase diagram and electric properties of the (Mn, K)-modified Bi0.5Na0.5TiO3–BaTiO3 lead-free ceramics

2011 ◽  
Vol 46 (13) ◽  
pp. 4675-4682 ◽  
Author(s):  
Min Xu ◽  
Feifei Wang ◽  
Tao Wang ◽  
Xinman Chen ◽  
Yanxue Tang ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Electric Properties ◽  
Lead Free ◽  
Lead Free Ceramics

Decreasing sintering temperature for BCZT lead-free ceramics prepared via hydrothermal route

2017 ◽  
Vol 10 (04) ◽  
pp. 1750046 ◽  
Author(s):  
Xiaoyu Lu ◽  
Bijun Fang ◽  
Shuai Zhang ◽  
Ningyi Yuan ◽  
Jianning Ding ◽  
...  
Keyword(s):  
Sintering Temperature ◽  
Electric Energy ◽  
Relaxor Ferroelectrics ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Hydrothermal Route ◽  
Pure Perovskite Structure ◽  
Lead Free Ceramics ◽  
Microstructure Morphology ◽  
Low Sintering Temperature

(Ba[Formula: see text]Ca[Formula: see text])(Zr[Formula: see text]Ti[Formula: see text])O3 (BCZT) lead-free ferroelectric ceramics were prepared at low sintering temperature via a hydrothermal route. The hydrothermal-synthesized BCZT precursor powder presents phase-pure perovskite structure and rather homogenous particles with dozens nanometers, which provides high sintering activity. Pure perovskite BCZT ceramics are synthesized at rather low sintering temperature accompanied by rather uniform microstructure morphology and high relative density. Dielectric peaks of the BCZT ceramics are rather broad, and their dielectric response behavior combines the characteristics of both the normal and relaxor ferroelectrics. The BCZT ceramics exhibit excellent ferroelectricity and promising electric energy density, which can be enhanced further with increasing electric field.

Optimum Sintering Temperature for Fabrication of 0.8Bi0.5Na0.5TiO3-0.2Bi0.5K0.5TiO3 Lead-Free Ceramics by Combustion Technique

2011 ◽  
Vol 474-476 ◽  
pp. 1754-1759 ◽  
Author(s):  
Atthakorn Thongtha ◽  
Theerachai Bongkarn
Keyword(s):  
Dielectric Constant ◽  
Remanent Polarization ◽  
Sintering Temperature ◽  
Sodium Titanate ◽  
Lead Free ◽  
Bismuth Sodium Titanate ◽  
Sintered Ceramic ◽  
Lead Free Ceramics ◽  
Average Grain Size ◽  
Combustion Technique

The effect of sintering temperatures (1050-1200 °C) on the phase formation, microstructure and dielectric properties of a binary system lead-free ceramic bismuth sodium titanate–bismuth potassium titanate were investigated. 0.8Bi0.5Na0.5TiO3-0.2Bi0.5K0.5TiO3; BNKT ceramics were successfully fabricated using the combustion technique. XRD results showed the rhombohedral-tetragonal morphotropic phase boundary (MPB). The SEM results showed the average grain size (0.51-2.59 µm) of the samples increased with the increase of sintering temperatures. The sample sintered at the optimum temperature of 1150 °C exhibited the maximum density, shrinkage, dielectric constant at Curie temperature and remanent polarization (Pr) which were around 5.65 g/cm3, 17.75%, 5014 and 1.6 mC/cm2, respectively. The dielectric constant was related to the XRD results and density of the sintered ceramic.

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