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Title: Superior Reliability Via Two‐Step Sintering: Barium Titanate Ceramics

Abstract

Two‐step sintering ( TSS ) in a reducing atmosphere has been employed to obtain fine‐grain BaTiO 3 ceramics with a core‐shell microstructure, a more uniform grain‐size distribution, and superior reliability for multilayer ceramic capacitor applications. Compared to ceramics of the same composition conventionally sintered for about the same time, TSS ceramics feature a thinner shell thickness thus a stronger dopant localization, which leads to a lower concentration, higher internal resistance and more dopant‐ association. Improved reliability is manifest in a 50% higher breakdown strength at ambient temperature and a 400% longer endurance time to withstand DC stress at 185°C, in addition to a less field‐and‐temperature‐dependent capacitance. A scaling analysis of the redistribution and endurance dynamics identifies transmission across the shell‐grain‐boundary region as the critical element beneficially impacted by core‐shell structure and two‐step sintering.

Authors:
 [1];  [1];  [1];  [2];  [1];
+ Show Author Affiliations
  1. State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China
  2. Department of Materials Science and Engineering University of Pennsylvania Philadelphia Pennsylvania 19104‐6272
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1400930
Grant/Contract Number:  
DEFG02‐11ER46814
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Name: Journal of the American Ceramic Society Journal Volume: 99 Journal Issue: 1; Journal ID: ISSN 0002-7820
Publisher:
Wiley-Blackwell
Country of Publication:
United States
Language:
English

Citation Formats

Zhao, Qiancheng, Gong, Huiling, Wang, Xiaohui, Chen, I‐Wei, Li, Longtu, and Dickey, ed., E. Superior Reliability Via Two‐Step Sintering: Barium Titanate Ceramics. United States: N. p., 2015. Web. doi:10.1111/jace.13940.
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Zhao, Qiancheng, Gong, Huiling, Wang, Xiaohui, Chen, I‐Wei, Li, Longtu, & Dickey, ed., E. Superior Reliability Via Two‐Step Sintering: Barium Titanate Ceramics. United States. https://doi.org/10.1111/jace.13940
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Zhao, Qiancheng, Gong, Huiling, Wang, Xiaohui, Chen, I‐Wei, Li, Longtu, and Dickey, ed., E. Thu . "Superior Reliability Via Two‐Step Sintering: Barium Titanate Ceramics". United States. https://doi.org/10.1111/jace.13940.
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@article{osti_1400930,
title = {Superior Reliability Via Two‐Step Sintering: Barium Titanate Ceramics},
author = {Zhao, Qiancheng and Gong, Huiling and Wang, Xiaohui and Chen, I‐Wei and Li, Longtu and Dickey, ed., E.},
abstractNote = {Two‐step sintering ( TSS ) in a reducing atmosphere has been employed to obtain fine‐grain BaTiO 3 ceramics with a core‐shell microstructure, a more uniform grain‐size distribution, and superior reliability for multilayer ceramic capacitor applications. Compared to ceramics of the same composition conventionally sintered for about the same time, TSS ceramics feature a thinner shell thickness thus a stronger dopant localization, which leads to a lower concentration, higher internal resistance and more dopant‐ association. Improved reliability is manifest in a 50% higher breakdown strength at ambient temperature and a 400% longer endurance time to withstand DC stress at 185°C, in addition to a less field‐and‐temperature‐dependent capacitance. A scaling analysis of the redistribution and endurance dynamics identifies transmission across the shell‐grain‐boundary region as the critical element beneficially impacted by core‐shell structure and two‐step sintering.},
doi = {10.1111/jace.13940},
journal = {Journal of the American Ceramic Society},
number = 1,
volume = 99,
place = {United States},
year = {Thu Sep 24 00:00:00 EDT 2015},
month = {Thu Sep 24 00:00:00 EDT 2015}
}
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Journal Article:
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Accepted Manuscript (Publisher)
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https://doi.org/10.1111/jace.13940
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