Investigation of structural and electrical properties of B-site complex ion (Nd1/2Ta1/2)4+-doped Bi1/2Na1/2TiO3 lead-free piezoelectric ceramic

Cheng, Renfei; Duan, Yuefeng; Chu, Ruiqing; Hao, Jigong; Du, Juan; Xu, Zhijun; Li, Guorong

doi:10.1007/s10854-015-3094-0

Cited by 6 publications

(1 citation statement)

References 30 publications

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“…i. Doped BNT: BNT ceramics have been previously doped with SrZrO3 (Maqbool et al, 2014), Bi(Mg0.5Ti0.5)O3 (Aman Ullah et al, 2015), (Nd0.5Ta0.5)xO3 (Cheng et al, 2015), KNbO3 (Jiang et al, 2014), CuO and NiO (Kakroo et al, 2016), CuO (Chou et al, 2011), and Fe2O3 (Aksel et al, 2010), the effects of mentioned doped on the properties has explained in the chapter two literature review.…”

Section: Dopantsmentioning

confidence: 99%

Development of Novel Processing Routes for Electrical Ceramics and Glass-Ceramics

Muhammed¹

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The study in this project focuses on using three different processing routes, conventional solid-state sintering, microwave sintering and melt processing, to manufacture electrical ceramics and glass-ceramics in bismuth sodium titanate (BNT) and potassium sodium niobate (KNN) systems. Manufacturing electrical ceramics using a conventional solid-state processing route requires high sintering temperatures (more than 1100 o C) for long times (at least 10 hours including heating and cooling), with high energy consumption (20kWh) for electrical furnaces, leading to high cost. Moreover, laboratory-scale preparation of electrical ceramics in the author's home country, Iraq, is difficult because of equipment shortages and power watts. Therefore, in the present work, a microwave processing route using a standard kitchen microwave oven has been used to produce electrical ceramics, whilst dramatically reducing sintering times (heating between 20-25mins and cooling 2h) and thus energy consumption (0.4kWh). Also, a melt processing route has been used to manufacture electrical glass-ceramics as bulk and fibre samples, thus reducing processing steps and preparing KNN borosilicate glass-ceramic fibres for the first time.Microwave sintering/heating depends on the generation of heating throughout the sample simultaneously. This project has used a combination of direct microwave heating of the sample itself, combined with indirect heating by microwave susceptor disks placed close to the sample. In the present project, microwave susceptor disks composed of 50wt% graphite, 30wt% SiO2, 10wt% Mn2O3, 10wt% Fe3O4 have been used.Both conventional solid-state sintering and microwave processing have been used to prepare four different electrical ceramic compositions: pure bismuth sodium titanate (Bi0.5Na0.5TiO3), pure potassium sodium niobate (K0.5Na0.5NbO3), iron-doped bismuth sodium titanate (Bi0.5Na0.5Ti1-xFexO3-0.5x) and iron-doped potassium sodium niobate (K0.5Na0.5Nb1-xFexO3-x), with high sintering temperatures (900-1100 o C) for 2h inside an electrical furnace (conventional sintering) and short heating times (10-25 mins) inside a standard 900W kitchen microwave oven.A melt processing route has also been used, with the aim of preparing bismuth sodium titanate (Bi0.5Na0.5TiO3) and potassium sodium niobate (K0.5Na0.5NbO3) by heat treatment of bismuth sodium titanium silicate, bismuth sodium titanium borate, potassium sodium niobium silicate, potassium sodium niobium borate and potassium Pure KNN ceramics have been prepared by solid-state sintering and microwave sintering. In addition, KNN-silicate glasses, KNN-borate glasses, KNN-borosilicate glasses and KNN-borosilicate glass fibres have been prepared by melt processing, and subsequent heat treatment with the aim of forming KNN in the resulting glass-ceramics. A K0.5Na0.5NbO3 phase with orthorhombic structure has been successfully produced by solid-state sintering and microwave sintering processing. Also, a main K0.5Na0.5NbO3 phase with anorthic structure has been presented for KNN-...

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Section: Dopantsmentioning

confidence: 99%

Development of Novel Processing Routes for Electrical Ceramics and Glass-Ceramics

Muhammed¹

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Low electric field-induced strain and large improvement in energy density of (Lu0.5Nb0.5)4+ complex-ions doped BNT–BT ceramics

Pang

Qin

et al. 2019

Appl. Phys. A

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Enhanced energy-storage performance and temperature-stable dielectric properties of (1 − x)(0.94Na0.5Bi0.5TiO3–0.06BaTiO3)–xNa0.73Bi0.09NbO3 ceramics

Wang

Fan

et al. 2018

J Mater Sci: Mater Electron

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Investigation of structural and electrical properties of B-site complex ion (Nd1/2Ta1/2)4+-doped Bi1/2Na1/2TiO3 lead-free piezoelectric ceramic

Cited by 6 publications

References 30 publications

Development of Novel Processing Routes for Electrical Ceramics and Glass-Ceramics

Development of Novel Processing Routes for Electrical Ceramics and Glass-Ceramics

Low electric field-induced strain and large improvement in energy density of (Lu0.5Nb0.5)4+ complex-ions doped BNT–BT ceramics

Enhanced energy-storage performance and temperature-stable dielectric properties of (1 − x)(0.94Na0.5Bi0.5TiO3–0.06BaTiO3)–xNa0.73Bi0.09NbO3 ceramics

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