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论文:2021,Vol:39,Issue(1):208-215 |
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引用本文： |
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张海鸿, 王启, 王金海, 于方丽, 唐健江, 张阔, 赵志刚. HF原位催化高气孔率晶须框架多孔莫来石的制备及强化机制研究[J]. 西北工业大学学报 |
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ZHANG Haihong, WANG Qi, WANG Jinhai, YU Fangli, TANG Jianjiang, ZHANG Kuo, ZHAO Zhigang. Preparation and strengthening mechanisms of in-situ HF catalyzed highly porous mullite with whisker frame structure[J]. Northwestern polytechnical university |
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| HF原位催化高气孔率晶须框架多孔莫来石的制备及强化机制研究 |
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| 张海鸿, 王启, 王金海, 于方丽, 唐健江, 张阔, 赵志刚 |
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| 西安航空学院 材料工程学院, 陕西 西安 710077 |
| 摘要: |
| 利用HF为催化剂，基于溶胶-凝胶化学前驱体粉末模压烧结工艺，使坯体中原位生成晶须框架结构多孔莫来石。由于HF的高效催化，此结构具有高气孔率高强度的特征。讨论了HF添加量和烧结温度对莫来石晶须框架生成、相变过程及对多孔材料气孔率和强度的影响规律，并确定了最佳工艺参数。初步分析经HF催化后，经原位生长得到搭接点间紧密结合的晶须框架结构，进而增强多孔材料强度的机制。该方法制备的晶须框架多孔莫来石气孔率达83.22%时，抗压强度可达16.48 MPa。 |
| 关键词:
莫来石
晶须框架
多孔陶瓷
HF催化剂
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| Preparation and strengthening mechanisms of in-situ HF catalyzed highly porous mullite with whisker frame structure |
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| ZHANG Haihong, WANG Qi, WANG Jinhai, YU Fangli, TANG Jianjiang, ZHANG Kuo, ZHAO Zhigang |
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| School of Materials Engineering, Xi'an Aeronautic University, Xi'an 710077, China |
| Abstract: |
| Using HF as catalyst and based on sol-gel chemical precursor powder molding and sintering process, porous mullite with whisker frame structure was in-situ synthesized in the blank body. Due to the high efficiency catalysis of HF, this structure has both of high porosity and high strength. The effects of HF addition and sintering temperature on the formation of mullite whisker frame, phase transition process, porosity and strength of porous materials were discussed, and the optimal process parameters were determined. The mechanism of strengthening the porous materials was preliminary analyzed, and under the catalysis of HF, the close connection between whisker frame lap joints was formed. When the porosity of mullite is up to 83.22%, the compressive strength of can reach 16.48 MPa. |
| Key words:
mullite
whisker frame
porous ceramics
HF catalyst
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| 收稿日期: 2020-03-05
修回日期:
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| DOI: 10.1051/jnwpu/20213910208 |
| 基金项目: 国家自然科学基金青年项目（51902241）、陕西省科学技术厅自然科学基础研究计划一般项目（青年）（2019JQ-910，2020JQ-911）、陕西省自然科学基础研究计划（面上项目）（2020JM-631）与西安交通大学金属材料强度国家重点实验室开放课题（20171912）资助 |
| 通讯作者:
Email： |
| 作者简介: 张海鸿(1983-),女,西安航空学院讲师,主要从事先进陶瓷材料制备研究。
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| 作者相关文章 |
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| 张海鸿 在本刊中的所有文章 |
| 王启 在本刊中的所有文章 |
| 王金海 在本刊中的所有文章 |
| 于方丽 在本刊中的所有文章 |
| 唐健江 在本刊中的所有文章 |
| 张阔 在本刊中的所有文章 |
| 赵志刚 在本刊中的所有文章 |
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参考文献: |
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[1] WANG X, GUO A R, LIU J P, et al. Effects of in situ synthesized mullite whiskers on compressive strength of mullite fiber brick[J]. Ceramics International, 2016, 42: 13161-13167
[2] HE Z. Fabrication and microstructures improvement of porous mullite ceramics based on sol-treated sawdust[J]. J Ceram Soc Jpn, 2020, 128: 254-266
[3] BAREA R, OSENDI M I, MIRANZO P, et al. Fabrication of highly porous mullite materials[J]. Journal of the American Ceramic Society, 2005, 88: 777-779
[4] HAMMEL E C, IGHODARO O L R, OKOLI O I. Processing and properties of advanced porous ceramics: an application based review[J]. Ceramics International, 2014, 40: 15351-15370
[5] SHE J H, OHJI T. Fabrication and characterization of highly porous mullite ceramics[J]. Materials Chemistry and Physics, 2003, 80: 610-614
[6] 邓先功. 发泡-注凝成型法制备莫来石柱晶自增强多孔陶瓷及其高温力学和热学性能[D]. 武汉: 武汉科技大学, 2016 DENG Xiangong. Preparation, high temperature mechanical and insulation thermal properties of elongated mullite self-reinforced porous ceramics via foam-gelcasting method[D]. Wuhan: Wuhan University of Science and Technology, 2016(in Chinese)
[7] 杨孟孟, 罗旭东, 谢志鹏, 等. AlF3含量对莫来石多孔陶瓷显微结构和强度的影响[J]. 陶瓷学报, 2019, 40: 181-185 YANG Mengneng, LUO Xudong, XIE Zhipeng, et al. Effect of AlF3 content on microstructure and strength of mullite porous ceramics[J]. Journal of Ceramics, 2019, 40: 181-185(in Chinese)
[8] LI S H, DU H Y, GUO A R, et al. Preparation of self-reinforcement of porous mullite ceramics through in situ synthesis of mullite whisker in flyash body[J]. Ceramics International, 2012, 38: 1027-1032
[9] DING S Q, ZHU S M, ZENG Y P, et al. Fabrication of mullite-bonded porous silicon carbide ceramics by in situ reaction bonding[J]. Journal of the European Ceramic Society, 2007, 27: 2095-2102
[10] 王涵, 李翠伟, 武令豪, 等. 颗粒稳定泡沫法制备莫来石基多孔陶瓷的结构与性能[J]. 硅酸盐学报, 2020, 48(375): 42-50 WANG Han, LI Cuiwei, WU Linhao, et al. Structure and properties of mullite-based porous ceramics prepared by particle stabilized foam method[J]. Journal of the Chinese Ceramic Society 2020, 48(375): 42-50(in Chinese)
[11] 任海涛, 贾韬, 刘家臣, 等. 具有三维网络结构的莫来石纤维多孔隔热材料的制备及性能研究[J]. 航空科学技术, 2018, 29: 73-78 REN Haitao, JIA Tao, LIU Jiachen, et al. Preparation and properties of mullite fiber porous thermal insulation materials with three-dimensional network structure[J]. Aeronautical Science & Technology, 2018, 29: 73-78(in Chinese)
[12] 许林峰. 固相烧结法制备高孔隙率莫来石多孔陶瓷的研究[D]. 广州: 华南理工大学, 2015 XU Linfeng. Pration of mullite porous ceramic with high porosity through a solid-phase sintering process[D]. Guangzhou: South China University of Technology, 2015(in Chinese)
[13] XU L F, XI X A, SHUI A Z, et al. Preparation of mullite whisker skeleton porous ceramic[J]. Ceramics International, 2015, 41: 11576-11579
[14] HOU Z G, DU H Y, LIU J C, et al. Fabrication and properties of mullite fiber matrix porous ceramics by a TBA-based gel-casting process[J]. Journal of the European Ceramic Society, 2013, 33: 717-725
[15] ZHU L, DONG Y C, HAMPSHIRE S, et al. Waste-to-resource preparation of a porous ceramic membrane support featuring elongated mullite whiskers with enhanced porosity and permeance[J]. Journal of the European Ceramic Society, 2015, 35: 711-721
[16] SCHNEIDER H, SCHREUER J, HILDMANN B. Structure and properties of mullite-a review[J]. Journal of the European Ceramic Society, 2008, 28: 329-344
[17] LIU S, LIU J C, DU H Y, et al. microstructure of mullite fiber-based hierarchical structures adjusted by Al/Si mole ratio of the raw material powders[J]. Ceramics International, 2014, 40: 11405-11410
[18] 邓先功, 王军凯, 张海军, 等. 莫来石晶须的制备及其生长机理[J]. 硅酸盐学报, 2016, 44: 901-907 DENG Xiangong, WANG Junkai, ZHANG Haijun, et al. Reparation and growth mechanism of mullite whiskers[J]. Journal of the Chinese Ceramic Society, 2016, 44: 901-907(in Chinese)
[19] 张海鸿, 段晓卡, 于方丽, 等. 含氟催化剂对莫来石晶须各向异性生长过程的影响研究[J]. 人工晶体学报, 2019, 48: 1326-1330 ZHANG Haihong, DUAN Xiaoka, YU Fangli, et al. Effect of fluorinated catalyst on the anisotropic growth of mullite whisker[J]. Journal of Synthetic Crystals, 2019, 48: 1326-1330(in Chinese)
[20] KINGERY W D, BERG M. Study of the initial stages of sintering solids by viscous flow, evaporation-condensation, and self-diffusion[J]. Journal of Applied Physics, 1955, 26: 1205-1212
[21] KANKA B, SCHNEIDER H. Sintering mechanisms and microstructural development of coprecipitated mullite[J]. Journal of Materials Science, 1994, 29: 1239-1249 |
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