以共沉淀-喷雾干燥法制备的Ce0.8 Sm0.2 O1.9(SDC)粉体为原料,模压成型后高温烧结获得SDC电解质陶瓷片.研究模压成型过程中加压时间、压力大小以及烧结温度对烧结体致密度的影响,利用XRD和SEM分别对不同烧结温度获得的烧结体结构和表面形貌进行分析.研究表明,压力30MPa、加压时间30min后获得的坯体,随着烧结温度的升高,烧结体致密度呈上升趋势,烧结温度达到1450℃时进入烧结后期,烧结体具有较高的致密度.此外,通过测定烧结过程中坯体收缩率,对SDC电解质陶瓷片的烧结动力学进行了研究,从而确定SDC电解质致密化的烧结温度为1300～1500℃.
The SDC electrolyte materials are prepared at high sintering temperature after molding using Sm2O3 doped Ca2 powders which are prepared by the coprecipitation-spray drying method. The effects of the molding pressure, holding time and sintering temperature on densification are studied. The microstructure and structural property of the sintered SDC are analyzed by SEM and XRD. The results show that the relative density of sintered SDC increases with sintering temperature increasing after dry-pressing process under 30MPa pressure for 30min holding time,the sintered SDC has high relative density at 1450℃. In addition, the characteristics of sintering kinetic curves of SDC ceramic are studied by means of measuring shrinkage. The results confirm that sintering temperature of SDC densification is 1300～1500℃.
参考文献
| [1] | 于兴文,黄学杰,陈立泉.固体氧化物燃料电池研究进展[J].电池,2002(02):110-112. |
| [2] | Charpentier P.;Schleich DM.;Gehain E.;Fragnaud P. .Preparation of thin film SOFCs working at reduced temperature[J].Solid state ionics,2000(1/4):373-380. |
| [3] | 谭小耀,于如军,杨乃涛,于先进,朱彬.中温固体氧化物燃料电池性能的初步研究[J].山东工程学院学报,2001(01):1-3. |
| [4] | 孟广耀,付清溪,彭定坤.中温固态氧化物燃料电池[J].太阳能学报,2002(03):378-382. |
| [5] | Matsui T;Minoru I;Mineshige A;Ogumi Z .Electrochemical properties of ceria-based oxides for use in intermediate-temperature SOFCs[J].Solid state ionics,2005(7/8):647-654. |
| [6] | 罗丹,骆仲泱,余春江.团聚对中温固体氧化物燃料电池电解质Sm0.15Gd0.05Ce0.8O1.9致密化的影响[J].无机材料学报,2007(06):1041-1045. |
| [7] | 施剑林 .固相烧结Ⅰ--气孔显微结构模型及其热力学稳定性,致密化方程[J].硅酸盐学报,1997,25(05):499. |
| [8] | 袁永瑞,邓莉萍,罗军明,张剑平,张国光.Ce0.8Sm0.1Gd0.1O1.9电解质的制备及其性能研究[J].稀有金属与硬质合金,2007(02):11-13. |
| [9] | 桥本谦一.陶瓷基础[M].北京:中国轻工业出版社,1986:296. |
| [10] | 宋希文,王哲峰,赵永旺,赵文广,安胜利.Sm2O3掺杂CeO2纳米粉体的烧结动力学[J].中国稀土学报,2004(03):345-348. |
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