{"title":"通过 MgSiN2 降低氧势以提高 MgO-C 耐火材料抗氧化性的策略","authors":"Fanqiang Meng, Yixin Luo, Zhenglong Liu, Chao Yu, Chengji Deng, Jun Ding","doi":"10.1111/jace.20114","DOIUrl":null,"url":null,"abstract":"<p>MgO–C refractories are of paramount importance in the converter side blowing system, requiring outstanding oxidation resistance under harsh conditions including high temperature, oxygen atmosphere, and high-speed airflow. In this study, MgSiN<sub>2</sub> phase reconstruction was used to improve the oxidation resistance of MgO–C refractories, as well as the mechanical properties and oxidation resistance of MgO–C refractories were evaluated. The results indicated that the cold modulus of rupture of the sample with 9 wt% MgSiN<sub>2</sub> was increased by 93.3% compared with the MgO–C refractories without MgSiN<sub>2</sub>. After oxidation tests, the oxidation index and rate constant (<i>k</i>) of the sample with 9 wt% MgSiN<sub>2</sub> were reduced by 38.9% and 35.3%. Furthermore, incorporating MgSiN<sub>2</sub> facilitated the formation of layered dense structures consisting of plate-like Mg-Sialon and MgO–Mg<sub>2</sub>SiO<sub>4</sub>–MgAl<sub>2</sub>O<sub>4</sub>. This structural optimization effectively inhibited oxygen diffusion and reaction within the material, resulting in gradual oxygen potential mitigation.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 1","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Strategies to improve oxidation resistance of MgO–C refractories by decreasing oxygen potential through MgSiN2\",\"authors\":\"Fanqiang Meng, Yixin Luo, Zhenglong Liu, Chao Yu, Chengji Deng, Jun Ding\",\"doi\":\"10.1111/jace.20114\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>MgO–C refractories are of paramount importance in the converter side blowing system, requiring outstanding oxidation resistance under harsh conditions including high temperature, oxygen atmosphere, and high-speed airflow. In this study, MgSiN<sub>2</sub> phase reconstruction was used to improve the oxidation resistance of MgO–C refractories, as well as the mechanical properties and oxidation resistance of MgO–C refractories were evaluated. The results indicated that the cold modulus of rupture of the sample with 9 wt% MgSiN<sub>2</sub> was increased by 93.3% compared with the MgO–C refractories without MgSiN<sub>2</sub>. After oxidation tests, the oxidation index and rate constant (<i>k</i>) of the sample with 9 wt% MgSiN<sub>2</sub> were reduced by 38.9% and 35.3%. Furthermore, incorporating MgSiN<sub>2</sub> facilitated the formation of layered dense structures consisting of plate-like Mg-Sialon and MgO–Mg<sub>2</sub>SiO<sub>4</sub>–MgAl<sub>2</sub>O<sub>4</sub>. This structural optimization effectively inhibited oxygen diffusion and reaction within the material, resulting in gradual oxygen potential mitigation.</p>\",\"PeriodicalId\":200,\"journal\":{\"name\":\"Journal of the American Ceramic Society\",\"volume\":\"108 1\",\"pages\":\"\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-09-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the American Ceramic Society\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jace.20114\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the American Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jace.20114","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Strategies to improve oxidation resistance of MgO–C refractories by decreasing oxygen potential through MgSiN2
MgO–C refractories are of paramount importance in the converter side blowing system, requiring outstanding oxidation resistance under harsh conditions including high temperature, oxygen atmosphere, and high-speed airflow. In this study, MgSiN2 phase reconstruction was used to improve the oxidation resistance of MgO–C refractories, as well as the mechanical properties and oxidation resistance of MgO–C refractories were evaluated. The results indicated that the cold modulus of rupture of the sample with 9 wt% MgSiN2 was increased by 93.3% compared with the MgO–C refractories without MgSiN2. After oxidation tests, the oxidation index and rate constant (k) of the sample with 9 wt% MgSiN2 were reduced by 38.9% and 35.3%. Furthermore, incorporating MgSiN2 facilitated the formation of layered dense structures consisting of plate-like Mg-Sialon and MgO–Mg2SiO4–MgAl2O4. This structural optimization effectively inhibited oxygen diffusion and reaction within the material, resulting in gradual oxygen potential mitigation.
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The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials.
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