Preparation of solid electrolyte nano-sized powders and examination of relationship between oxide tonic conductivity and nano- structural features in sintered bodies

固体电解质纳米粉末的制备及氧化物渗透电导率与烧结体纳米结构特征之间关系的研究

基本信息

  • 批准号:
    15510084
  • 负责人:
  • 金额:
    $ 2.37万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2003
  • 资助国家:
    日本
  • 起止时间:
    2003 至 2006
  • 项目状态:
    已结题

项目摘要

For a design of high quality doped CeO_2 solid electrolytes, the oxide tonic conductivity must be maximized and the n-type semi-conducting property must be minimized into the specimens. In order to achieve them, we observed the micro-structure at atomic scale. Also we examined the relationship between electrical conductivity and micro-structural features in the doped CeO_2 sintered bodies. In the present study, we prepared the 20 kinds of specimens which are the electrolytes (Sm_xCe_<1-x>O_<2-x/2> and Gd_xCe_<1-x>O_<2-x/2>, x=0.05, 0.1, 0.15, 0.2 and 0.25) and n-type semi-conductors (Ho_xCe_<1-x>O_<2-x/2> and Tb_xCe_<1-x>O_<2-x/2>, x=0.05, 0.1, 0.15, 0.2 and 0.25) to examine the relationship between physical properties (i.e. electrical conductivity, activation energy, and so on) of sintered bodies and nano-structural features in sintered bodies. The average particle size of powders prepared by carbonate co-precipitation method was approximately sonm. The aforementioned specimens were d … More ensified more than 95 % of theoretical density. The conductivity in the sintered bodies was measured using direct current measurement method. The observation of micro-structural features at atomic scale was performed using transmission electron microscopy (TEM). The micro-domains with ordered structure of oxygen vacancy were observed in the electrolytes (i.e. Sm_xCeCe_<1-x>O_<2-x/2> and Gd_xCe_<1-x>O_<2-x/2>. The conductivity in those sintered bodies was decreased with increasing micro-domain content and micro-domain size. On the other hand, the small precipitates were observed in Ho_xCe_<1-x>O_<2-x/2> and Tb_xCe_<1-x>O_<2-x/2> sintered bodies. The huge amount of Ce^<3+> and do pant cation was observed into the precipitates. In the case of Ho_xCe_<1-x>O_<2-x/2> and Tb_xCe_<1-x>O_<2-x/2> sintered bodies, the typical n-type semi-conducting property was observed. Accordingly, for a design of high quality doped CeO_2 solid electrolytes, it is concluded that the micro-domain size must be minimized in the doped CeO_2 sintered bodies and the precipitates must be removed from the doped CeO_2 sintered bodies. Less
对于高质量掺杂CeO_2固体电解质的设计,必须最大化氧化物的紧张性和最小化样品的n型半导体性能。为了实现这一点,我们在原子尺度上观察了其微观结构。我们还研究了掺杂CeO2烧结体的电导率与微结构特征之间的关系。在本研究中,我们制备了20种样品,它们是电解液(Sm_xCe_&lt;1-x&gt;O_&lt;2-x/2&gt;1-x&gt;O_&lt;2-x/2&gt;,x=0.05,0.1,0.15,0.2和0.25)和n型半导体(Ho_xCe_&lt;1-x&gt;O_x&lt;2-x/2&gt;和Tb_xCe_&lt;1-x&gt;O_&lt;2-x/2&gt;,x=0.05、0.1、0.15、0.2和0.25),以考察烧结体的物理性能(即电导率、激活能等)与烧结体的纳米结构特征之间的关系。碳酸盐共沉淀法制备的粉末平均粒径约为10 mm。上述标本均为d…。更敏化理论密度的95%以上。用直流电测法测量了烧结体的电导率。用透射电子显微镜观察了其原子尺度上的微观结构特征。在Sm_xCeCe_&lt;1-x&gt;O_&lt;2-x/2&gt;和Gd_xCe_&lt;1-x&gt;O_&lt;2-x/2&gt;随着微区含量的增加和微区尺寸的增大,烧结体的电导率降低。另一方面,在Ho_xCe_&lt;1-x&gt;O_&lt;2-x/2&gt;和Tb_xCe_&lt;1-x&gt;O_&lt;2-x/2&gt;烧结体中观察到细小的析出物。在沉淀物中观察到大量的Ce~(2+)和阳离子。在Ho_xCe_&lt;1-x&gt;O_&lt;2-x/2&gt;Tb_xCe_&lt;1-x&gt;O_&lt;2-x/2&gt;烧结体的情况下,观察到典型的n型半导体性能。因此,为了设计高质量的CeO_2掺杂固体电解质,必须使掺杂CeO_2烧结体的微区尺寸最小,并且必须去除掺杂CeO_2烧结体中的析出物。较少

项目成果

期刊论文数量(114)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Synthesis, characterization, and electrical conduction of 10 mol% Dy2O3-doped CeO2 ceramics
  • DOI:
    10.1016/j.jeurceramsoc.2004.01.020
  • 发表时间:
    2005-03
  • 期刊:
  • 影响因子:
    5.7
  • 作者:
    Yarong Wang;T. Mori;Ji-guang Li;J. Drennan
  • 通讯作者:
    Yarong Wang;T. Mori;Ji-guang Li;J. Drennan
Influence of nano-structural feature on electrolytic properties in Y2O3 doped CeO2 system
  • DOI:
    10.1016/s1468-6996(03)00047-0
  • 发表时间:
    2003-01
  • 期刊:
  • 影响因子:
    5.5
  • 作者:
    T. Mori;J. Drennan;Yarong Wang;G. Auchterlonie;Ji-guang Li;A. Yago
  • 通讯作者:
    T. Mori;J. Drennan;Yarong Wang;G. Auchterlonie;Ji-guang Li;A. Yago
Microstructural characterization of terbium-doped ceria
  • DOI:
    10.1016/j.materresbull.2006.08.007
  • 发表时间:
    2007-05
  • 期刊:
  • 影响因子:
    5.4
  • 作者:
    F. Ye;T. Mori;D. Ou;J. Zou;J. Drennan
  • 通讯作者:
    F. Ye;T. Mori;D. Ou;J. Zou;J. Drennan
Reactive Ce_<0.8>RE_<0.2>0_<1.9> (RE=Gd and Sm) nano-powders : synthesis via homogeneous precipitation, characterization, and low-temperature sintering into dense ceramics
活性 Ce_<0.8>RE_<0.2>0_<1.9>(RE=Gd 和 Sm)纳米粉末:通过均匀沉淀、表征和低温烧结合成致密陶瓷
Development of doped CeO_2 electrolytes for low temperature operation of SOFC -A challenge for development of high quality solid electrolytes with nano-heterostructure
用于SOFC低温运行的掺杂CeO_2电解质的开发——开发高质量纳米异质结构固体电解质的挑战
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yarong Wang;Toshiyuki Mori;Toshiyuki Mori;Toshiyuki MORI
  • 通讯作者:
    Toshiyuki MORI
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MORI Toshiyuki其他文献

MORI Toshiyuki的其他文献

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{{ truncateString('MORI Toshiyuki', 18)}}的其他基金

Design of device for electric generation and energy saving which can contribute to the decreasing dependency on atomic power generation
有助于减少对原子能发电的依赖的发电和节能装置的设计
  • 批准号:
    25281066
  • 财政年份:
    2013
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Elucidating the double fertilization mechanism controlled by sperm membrane structures
阐明精子膜结构控制的双受精机制
  • 批准号:
    24770062
  • 财政年份:
    2012
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Design of residential scale fuel cells by nano-structural control techniques for minimization of CO2 gas emission
通过纳米结构控制技术设计住宅规模燃料电池,以最大限度地减少二氧化碳气体排放
  • 批准号:
    22310053
  • 财政年份:
    2010
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Fabrication and Characterization of nano-structured CeO_2 thin film electrolytes for low temperature operation of SOFC
SOFC低温运行纳米结构CeO_2薄膜电解质的制备与表征
  • 批准号:
    19310062
  • 财政年份:
    2007
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Fabrication of nano-ionics bulk materials by soft chemical approach
软化学方法制备纳米离子块体材料
  • 批准号:
    16079210
  • 财政年份:
    2004
  • 资助金额:
    $ 2.37万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Priority Areas

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