| 引用本文: | 张登,冯雪茹,高雄,张家敏,彭玉青,潘志铖,戴宗明.基于伴生稀土高岭土制备致密堇青石陶瓷的研究[J].材料科学与工艺,2024,32(2):44-54.DOI:10.11951/j.issn.1005-0299.20220344. |
| ZHANG Deng,FENG Xueru,GAO Xiong,ZHANG Jiamin,PENG Yuqing,PAN Zhicheng,DAI Zongming.Preparation of dense cordierite ceramics based on associated rare earth kaolinite[J].Materials Science and Technology,2024,32(2):44-54.DOI:10.11951/j.issn.1005-0299.20220344. |
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| 基于伴生稀土高岭土制备致密堇青石陶瓷的研究 |
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张登1,冯雪茹2,高雄1,张家敏1,彭玉青1,潘志铖1,戴宗明2
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(1.昆明理工大学 材料科学与工程学院,昆明 650093; 2.中国地质科学院矿产综合利用研究所,成都 610041) [HJ1.7mm]
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| 摘要: |
| 堇青石具有优良的力学性能,主要用于耐火材料等领域。本研究以天然高岭土矿物粉末为原料,通过成分调整并采用固相烧结法制备了高性能的堇青石陶瓷,利用气孔率、XRD、SEM、维氏硬度、抗弯强度等分析测试方法对堇青石结构和性能进行了表征。研究表明:堇青石陶瓷配比为伴生稀土高岭土80.2wt.%、氧化铝7.6wt.%和氧化镁12.2wt.%,当烧结温度由1 100 ℃提升至1 250 ℃,且原料粒度由100目降至300目,样品中堇青石相含量增加到96.6%,体积密度达到2.51 g/cm3、致密度高达99.8%,维氏硬度上升至11.56 GPa,抗弯强度达到127 MPa,经3次热震循环后,材料的抗弯强度达到150 MPa。综合堇青石材料对硬度、抗弯强度与抗热震性能的要求,其最佳烧结温度为1 200 ℃,且原料粒度越小,堇青石结构与性能越好。 |
| 关键词: 堇青石陶瓷 伴生稀土高岭土 烧结温度 粒度 力学性能 |
| DOI：10.11951/j.issn.1005-0299.20220344 |
| 分类号:TQ174.5 |
| 文献标识码:A |
| 基金项目:四川省科技计划资助项目(2021YFG0236). |
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| Preparation of dense cordierite ceramics based on associated rare earth kaolinite |
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ZHANG Deng1, FENG Xueru2, GAO Xiong1, ZHANG Jiamin1, PENG Yuqing1, PAN Zhicheng1, DAI Zongming2
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(1.Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2.Institute of Multipurpose Utilization of Mineral Resources, CAGS,Chengdu 610041, China) [HJ1.5mm]
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| Abstract: |
| Cordierite presents a range of excellent mechanical properties, mainly used in refractories and the related fields. In this study, cordierite ceramics with high performance were prepared by solid phase sintering with natural kaolin mineral powder as the raw material. The structure and properties of cordierite were characterized by porosity, XRD, SEM, Vickers hardness, and bending strength. The study showed that the ratio of cordierite ceramics is 80.2wt.% associated rare earth kaolin, 7.6wt.% alumina, and 12.2wt.% magnesium oxide. When the sintering temperature increases from 1 100 ℃ to 1 250 ℃ and the particle size of raw materials decreases from 100 mesh to 300 mesh, the content of cordierite phase in the sample increases up to 96.6%,the volume density 2.51 g/cm3, the induced density 99.8%, the vickers hardness 11.56 GPa, and the bending strength 127 MPa. After three thermal shock cycles, the bending strength of the material reached 150 MPa. Considering the requirements of hardness, bending strength, and thermal shock resistance of cordierite material, the best sintering temperature is 1 200 ℃.The smaller particle size of the raw material tends to bring about better structure and performance of cordierite. |
| Key words: cordierite ceramics associated rare earth kaolin sintering temperature particle size mechanical properties |
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