堇青石-莫来石质匣钵材料抗热震性和抗侵蚀性研究
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摘要
堇青石-莫来石质耐火材料具有热膨胀系数低、容重轻、吸热少、体积稳定性好和抗热震性好等特性。以堇青石、莫来石为主要原料,加入一定量的电熔氧化镁、活性氧化铝和硅微粉等微粉为辅助原料,制备了堇青石-莫来石质匣钵材料。研究了颗粒级配和烧成温度对堇青石-莫来石质匣钵材料物相组成和显微结构的影响,并对材料的热震性和侵蚀性进行评估。结果表明:烧成温度在1300～1400℃,对热震后的三组试样进行性能检测,发现配方一试样具有好的抗热震性和抗侵蚀性,其残余抗折强度在3. 0～4. 5 MPa之间,残余耐压强度在17. 5～24. 5 MPa之间。
Cordierite-mullite refractories have low thermal expansion coefficient,light bulk density,low heat absorption,good volume stability and good thermal shock resistance. Cordierite-mullite material saggars were prepared by using cordierite and mullite as the main raw materials,adding a certain amount of fine powders( fused magnesia,activated alumina,and silicon powder) as auxiliary material. The effects of grain size distribution and sintering temperature on the phase composition and microstructure of cordierite-mullite materials were studied,and the thermal shock and corrosion properties of the materials were evaluated. The results show that when the sintering temperature is 1300-1400 ℃,the performance of the sample after thermal shock is tested,formula one sample has good thermal shock resistance and corrosion resistance,the residual flexural strength is between 3. 0-4. 5 MPa,and the residual compressive strength is between 17. 5-24. 5 MPa.
Cordierite-mullite refractories have low thermal expansion coefficient,light bulk density,low heat absorption,good volume stability and good thermal shock resistance. Cordierite-mullite material saggars were prepared by using cordierite and mullite as the main raw materials,adding a certain amount of fine powders( fused magnesia,activated alumina,and silicon powder) as auxiliary material. The effects of grain size distribution and sintering temperature on the phase composition and microstructure of cordierite-mullite materials were studied,and the thermal shock and corrosion properties of the materials were evaluated. The results show that when the sintering temperature is 1300-1400 ℃,the performance of the sample after thermal shock is tested,formula one sample has good thermal shock resistance and corrosion resistance,the residual flexural strength is between 3. 0-4. 5 MPa,and the residual compressive strength is between 17. 5-24. 5 MPa.
引文
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[4]温海琴,席红安,李勤,等.原位反应烧成莫来石-堇青石复合材料及其特性[J].硅酸盐学报,2010,38(2):347-351.
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[6] Ozel E,Kurama S. Effect of the processing on the production of cordierite-mullite composite[J]. Ceramics International,2010,36(3):1033-1039.
[7]徐晓虹,马雄华,吴建锋,等.太阳能热发电用堇青石-莫来石复相陶瓷的制备及抗热震性[J].武汉理工大学学报,2012,34(1):1-6.
[8]徐晓虹,刘鑫坤,吴建锋,等.原位合成镁铝尖晶石-堇青石复相陶瓷的研究[J].武汉理工大学学报,2016,38(3):15-22.
[9]王立平.一种用于锂电池正极材料焙烧的高安定长寿命匣钵及制造方法:CN,CN102914165A[P]. 2013.
[10]徐海森.锂电池正极材料烧成用匣钵材料的研制[D].青岛:山东科技大学,2014.
[11]黄宏,黄朝晖,房明浩,等. Li CoO2合成过程对镁铝尖晶石陶瓷侵蚀的研究[J].硅酸盐通报,2011,30(3):515-518.
[12]孟军霞,杨智勇,杨磊,等.锂离子电池正极材料Li1. 12Ni0. 8Mn0. 1Co0. 1O2的制备及电化学性能研究[J].材料导报,2014,28(12):30-33.
[13]帅莉芳,王子港,李奇,等.球形Li[Ni0. 8Co0. 1Mn0. 1]O2的合成及性能研究[J].电源技术,2011,35(1):32-35.
[14] Kim M H,Sun Y K. Synthesis and electrochemical propertiesof Li[Ni0. 8Co0. 1Mn0. 1]O2via Co-precipitation[J]. Journal of Power Sources,2006,159(2):1328-1333.
[15] Zhang B,Li L J,Zheng J C. Characterization of multiple metals(Cr,Mg)substituted Li Ni0. 8Co0. 1Mn0. 1O2,cathode materials for lithium ion battery[J]. Journal of Alloys and Compounds,2012,520:190-194.