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多层低温流延法制备片状氧化铝多孔陶瓷

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Abstract:

为了避免金属/陶瓷复合散热片两相共烧,并减小因两相热膨胀系数不同而造成在使用过程中的开裂失效问题,采用水基Al2O3陶瓷浆料在低温下进行多层流延,经定向冷冻、低温干燥及烧结工艺,制备出具有小孔径、直通孔结构的片状Al2O3多孔陶瓷。研究了浆料固体含量和冷冻温度对多孔陶瓷片孔隙率和孔尺寸的影响,观察了孔的微观形貌并测试了其热疲劳性能。结果表明随着浆料固体含量从30%(质量分数)增加到40%,多孔陶瓷片的孔隙率(体积分数)从62.1%减小至51.4%,随着冷冻温度从–15℃降低至–45℃,多孔陶瓷片孔道尺寸逐渐减小;固体含量为40%、冷冻温度为–45℃的多孔陶瓷片在热疲劳实验中裂纹出现最晚,达到695次,其热疲劳性能最好;多层低温流延法制备的多孔陶瓷片层间孔道相互连通。

References

[1]  ? 万忠民, 陈敏, 刘伟, 等. 基于多孔微热沉的大功率LED冷却技术研究[J]. 机械工程学报, 2010, 46(8): 109–113.
[2]  WAN Zhongmin, CHEN Min, LIU Wei, et al. J Mech Eng (in Chinese), 2010, 46(8): 109–113.
[3]  ? 陈强, 谭敦强, 余方新, 等. 提高LED钨铜散热基板表面质量研究[J]. 粉末冶金工业, 2010, 20(6): 22–26.
[4]  CHEN Qiang, TAN Dunqiang, YU Fangxin, et al. Powder Metall Ind (in Chinese), 2010, 20(6): 22–26.
[5]  ? SCHUBERT T H, TRINDADE B, WEI?G¨ARBER T, et al. Interfacial design of Cu-based composites prepared by powder metallurgy for heat sink applications [J]. Mater Sci Eng, 2008(475): 39–44.
[6]  ? XIA Yang, SONG Yueqing, LIN Chenguang, et al. Effect of carbide formers on microstructure and thermal conductivity of diamond-Cu composites for heat sink materials [J]. Trans Nonferrous Met Soc China, 2009(10): 1161–1166.
[7]  ? 董国祥, 漆虹, 徐南平. 活性炭掺杂对多孔氧化铝陶瓷支撑体结构及性能的影响[J]. 硅酸盐学报, 2012, 40(6): 844–850.
[8]  DONG Guoxiang, QI Hong, XU Nanping. J Chin Ceram Soc, 2012, 40(6): 844–850.
[9]  ? 万帅, 吕文中, 付振晓. 水基流延片式ZnO压敏电阻器低温共烧工艺及其性能[J]. 硅酸盐学报, 2012, 40(4): 523–528.
[10]  WAN Shuai, LV Wenzhong, FU Zhenxiao. J Chin Ceram Soc, 2012, 40(4): 523–528.
[11]  ? 黄祖志, 罗凌虹, 卢泉, 等. 多孔NiO/钇稳定氧化锆陶瓷的水系流延成型[J]. 硅酸盐学报, 2008, 36(8): 1129–1133.
[12]  HUANG Zuzhi, LUO Linghong, LU Quan, et al. J Chin Ceram Soc, 2008, 36(8): 1129–1133.
[13]  ? YANG T Y, JI H B, YOON S Y, et al. Porous mullite composite with controlled pore structure processed using a freeze casting of TBA- based coal fly ash slurries [J]. Res Conserv Recycl, 2010, 54: 816–820.
[14]  ? ZHANG Yumin, HU Luyang, HAN Jiecai, et al. Freeze casting of aqueous alumina slurries with glycerol for porous ceramics [J]. Ceram Int, 2010, 36: 617–621.
[15]  ? CHEN Yu, JACOB B, LI Tingshuai, et al. Novel functionally graded acicular electrode for solid oxide cells fabricated by the freeze-tape- casting process [J]. J Power Sources, 2012, 213: 93–99.
[16]  ? STEPHEN W S. Fabrication of functionally graded and aligned porosity in thin ceramic substrates with the novel freeze–tape-casting process [J]. J Am Ceram Soc, 2007, 90(7): 2024–2031.
[17]  ? REN Linlin, ZENG Yuping, JIANG Dongliang. Fabrication of gradient pore TiO2 sheets by a novel freeze–tape-casting process [J]. Am Ceram Soc, 2007(1): 3001–3004.
[18]  ? CRINA S, HANNA T, IVAR W, et al. Water-based tape-casting of SOFC composite 3YSZ/8YSZ electrolytes and ionic conductivity of their pellets [J]. Ceram Int, 2011(7): 1–9.
[19]  ? GANNON P, SOFIE S, DEIBERT M. Thin film YSZ coatings on functionally graded freeze cast NiO/YSZ SOFC anode supports [J]. Appl Electrochem, 2009(39): 497–502.
[20]  ? 曹立宏, 马颖. 多孔锌合金孔隙率及通孔率的测定方法研究[J]. 甘肃科技, 2006, 22(5): 110–112.
[21]  CAO Lihong, MA Ying. Gansu Sci Technol (in Chinese), 2006, 22(5): 110–112.
[22]  ? 吴建锋, 冷光辉, 徐晓虹, 等. 原位生成堇青石结合红柱石太阳能热发电储热陶瓷的抗热震性能[J]. 硅酸盐学报, 2012, 40(7): 962– 969.
[23]  WU Jianfeng, LENG Guanghui, XU Xiaohong, et al. J Chin Ceram Soc, 2012, 40(7): 962–969.?

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