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Journal of Advanced Ceramics 2016, 5(4): 277-283 https://doi.org/10.1007/s40145-016-0200-6
Research Article | Open Access | Issue | Published: 23 December 2016

A new sintering approach to ceramics at low temperature from Ba(ZrxTi1-x)O3 nanoparticles doped by ZnO

Show Author's Information Rui GUOa,  Jianquan QIa( ),  Jiali LUOa,  Xiaoyu DONGa,  Longtu LIb
School of Nature Resources & Materials Science, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei 066004, China
State Key Laboratory of Fine Ceramics and New Processing, Tsinghua University, Beijing 100084, China
Keywords:
sintering, barium zirconate titanate (BaZrxTi1-xO3, BZT), nanopowder, direct synthesis
Cite this article:
GUO R, QI J, LUO J, et al. A new sintering approach to ceramics at low temperature from Ba(ZrxTi1-x)O3 nanoparticles doped by ZnO. Journal of Advanced Ceramics, 2016, 5(4): 277-283. https://doi.org/10.1007/s40145-016-0200-6
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Abstract Full text About this article

The sintering temperature decreases theoretically with the grain size of the ceramic powders, but it is not always right for fine grain sized nanopowders due to the inevitable agglomerations, and thus pores are hard to eliminate thoroughly during sintering. To overcome this difficulty, a new approach is designed to sintering ceramics at low temperature from nanoparticles. In this scheme, excessive dopants, such as ZnO, are synthesized into the nanoparticles, and they would be liberated again on the surfaces of the grains at high temperature as sintering aids homogenously to promote densification. Here, we compared the ceramic sintering of ZnO-doped barium zirconate titanate (BaZrxTi1-xO3, BZT) nanoparticles with BZT nanoparticles using ZnO as additive at 1150 ℃. Both kinds of nanoparticles were directly synthesized by the same process at room temperature and yielded the same initial grain size of ~10 nm. The dense BZT ceramic with relative density of 99% was fabricated from the 2 mol% ZnO-doped nanoparticles. On the other hand, the porous BZT ceramic with density of 78% was obtained from nanoparticles with 2 mol% ZnO as additive. Therefore, our strategy to ceramic sintering at low temperature from nanoparticles was confirmed.


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About this article

A new sintering approach to ceramics at low temperature from Ba(ZrxTi1-x)O3 nanoparticles doped by ZnO

Show Author's information Rui GUOa, Jianquan QIa( ), Jiali LUOa, Xiaoyu DONGa, Longtu LIb
School of Nature Resources & Materials Science, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei 066004, China
State Key Laboratory of Fine Ceramics and New Processing, Tsinghua University, Beijing 100084, China

Abstract

The sintering temperature decreases theoretically with the grain size of the ceramic powders, but it is not always right for fine grain sized nanopowders due to the inevitable agglomerations, and thus pores are hard to eliminate thoroughly during sintering. To overcome this difficulty, a new approach is designed to sintering ceramics at low temperature from nanoparticles. In this scheme, excessive dopants, such as ZnO, are synthesized into the nanoparticles, and they would be liberated again on the surfaces of the grains at high temperature as sintering aids homogenously to promote densification. Here, we compared the ceramic sintering of ZnO-doped barium zirconate titanate (BaZrxTi1-xO3, BZT) nanoparticles with BZT nanoparticles using ZnO as additive at 1150 ℃. Both kinds of nanoparticles were directly synthesized by the same process at room temperature and yielded the same initial grain size of ~10 nm. The dense BZT ceramic with relative density of 99% was fabricated from the 2 mol% ZnO-doped nanoparticles. On the other hand, the porous BZT ceramic with density of 78% was obtained from nanoparticles with 2 mol% ZnO as additive. Therefore, our strategy to ceramic sintering at low temperature from nanoparticles was confirmed.

Keywords: sintering, barium zirconate titanate (BaZrxTi1-xO3, BZT), nanopowder, direct synthesis

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Publication history
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Publication history

Received: 25 May 2016
Revised: 12 July 2016
Accepted: 15 July 2016
Published: 23 December 2016
Issue date: December 2016

Copyright

© The author(s) 2016

Acknowledgements

The authors are grateful for the supports of Basic Key Program of Applied Basic Research of Science and Technology Commission Foundation of Hebei Province in China (Grant Nos. 14961108D and 15961005D) and Open Project of State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University (No. KF201410).

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