[1]艾建平,周國紅*,王正娟,等.先驅體轉化法制備氧化鋯氈/氧化鋯多孔復合材料的力學與熱學性能研究[J].中國材料進展,2015,(12):036-40.[doi:10.7502/j.issn.1674-3962.2015.12.08]
AI Jianping,ZHOU Guohong*,WANG Zhengjuan,et al.Mechanical Properties and Thermal Conductivity of Porous ZrO2 Felt/ZrO2 Composites Fabricated by Precursor Conversion Method[J].MATERIALS CHINA,2015,(12):036-40.[doi:10.7502/j.issn.1674-3962.2015.12.08]
點擊復制
先驅體轉化法制備氧化鋯氈/氧化鋯多孔復合材料的力學與熱學性能研究(
)
中國材料進展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
-
- 期數:
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2015年第12期
- 頁碼:
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036-40
- 欄目:
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特約研究論文
- 出版日期:
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2015-12-25
文章信息/Info
- Title:
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Mechanical Properties and Thermal Conductivity of Porous ZrO2 Felt/ZrO2 Composites Fabricated by Precursor Conversion Method
- 作者:
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艾建平1; 2; 周國紅1*; 王正娟1; 2 ; 張海龍1; 王士維1*
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1.中國科學院上海硅酸鹽研究所，結構陶瓷工程研究中心，上海 200050；
2.中國科學院大學，北京 100049
- Author(s):
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AI Jianping1; 2; ZHOU Guohong1*; WANG Zhengjuan1; 2; ZHANG Hailong1; WANG Shiwei1*
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(1.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Structural Ceramics Engineering Research Center, Shanghai 200050, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China)
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- 關鍵詞:
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多孔陶瓷; ZrO2; 先驅體轉化法; 壓縮強度; 熱導率
- DOI:
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10.7502/j.issn.1674-3962.2015.12.08
- 文獻標志碼:
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A
- 摘要:
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采用氧氯化鋯(ZrOCl2?8H2O)為氧化鋯前驅體，利用真空-壓力浸漬工藝將前驅體浸漬液引入氧化鋯氈骨架中，循環浸漬、干燥、裂解十二次；常壓燒結(1450~1600℃)制備得到了低熱導率和高力學強度的氧化鋯氈/氧化鋯多孔復合材料。研究了燒結溫度對多孔復合材料的物相組成、體積密度、氣孔率、壓縮強度以及顯微結構的影響規律，分析了多孔復合材料內部的熱傳導機制。研究結果表明：燒結溫度1450℃時，有少量La2Zr2O7相生成；隨著燒結溫度提高，La2Zr2O7相消失，立方相氧化鋯含量逐漸增多；同時，多孔復合材料的氣孔率從50.5%降至45.5%，壓縮強度從16.9MPa增至40.0MPa；在低溫段多孔復合材料以聲子傳熱為主，而在高溫段材料內部氣體對流傳熱起主導作用，獲得的材料在100~1200℃溫度區間熱導率低于0.9W/(m?K)。
- Abstract:
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ZrO2 felt/ZrO2 porous composites were fabricated by vacuum – pressure infiltration technique using ZrOCl2?8H2O as precursor. After 12 cycles of infiltration – drying – pyrolysis and sintering at 1450~1600℃, the porous composites with both low thermal conductivity and high mechanical strength were obtained. The effects of sintering temperature on compressive strength and thermal conductivity were investigated on the basis of composition, density, porosity and microstructure. The results showed that a little La2Zr2O7 phase was formed at 1450℃ but disappeared when the sintering temperature increased. As the sintering temperature rose from 1450℃ to 1600℃, the content of c-ZrO2 gradually increased. Meanwhile, the porosity decreased from 50.5% to 45.5% and the compressive strength increased from 16.9 to 40.0 MPa. Possibly, phonon heat conduction dominated heat transfer of the porous composites in the low temperature range. While, convective heat transfer was dominated in the high temperature range. Thermal conductivity of the obtained composites was lower than 0.9 W/(m?k) in the range of 100℃ to 1200℃.
更新日期/Last Update:
2015-11-23