{"title":"水合柠檬酸镁的水化机理：MgCl2的影响","authors":"Jianjun Chen, Guoqing Xiao, Donghai Ding","doi":"10.1111/ijac.14894","DOIUrl":null,"url":null,"abstract":"<p>In this study, the evolutions of kinetic parameters, such as hydration temperature, pH, and electrical conductivity, were observed to investigate the hydration mechanism of hydrated magnesium citrate (HMC). Additionally, the effects of MgCl<sub>2</sub> on the hydration behavior of HMC and the working performance of its bonded castables were also investigated. The results show that the hydration mechanism of HMC is dissolution–precipitation, and its hydration product is magnesium citrate tetrahydrate [Mg(H<sub>2</sub>O)<sub>6</sub>] [MgC<sub>6</sub>H<sub>5</sub>O<sub>7</sub>(H<sub>2</sub>O)n]<sub>2</sub>∙(8-2n)H<sub>2</sub>O. The hydration process of HMC is controlled by the concentration of the C<sub>6</sub>H<sub>6</sub>O<sub>7</sub><sup>2−</sup> ions. MgCl<sub>2</sub> could inhibit the ionization of HMC, thereby delaying the hydration progress of HMC. The second exothermic peak was delayed from 1 to 4.8 h with increased MgCl<sub>2</sub> content to 1.0 wt.%. The working performance of HMC-bonded castables could be improved by adding MgCl<sub>2</sub>. After adding MgCl<sub>2</sub>, the setting time, flow value, and cold modulus of rupture of HMC-bonded castables increased by 26.7%, 25.2%, and 8.8%, respectively, while the porosity decreased by 12%.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hydration mechanism of hydrated magnesium citrate: The effects of MgCl2\",\"authors\":\"Jianjun Chen, Guoqing Xiao, Donghai Ding\",\"doi\":\"10.1111/ijac.14894\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In this study, the evolutions of kinetic parameters, such as hydration temperature, pH, and electrical conductivity, were observed to investigate the hydration mechanism of hydrated magnesium citrate (HMC). Additionally, the effects of MgCl<sub>2</sub> on the hydration behavior of HMC and the working performance of its bonded castables were also investigated. The results show that the hydration mechanism of HMC is dissolution–precipitation, and its hydration product is magnesium citrate tetrahydrate [Mg(H<sub>2</sub>O)<sub>6</sub>] [MgC<sub>6</sub>H<sub>5</sub>O<sub>7</sub>(H<sub>2</sub>O)n]<sub>2</sub>∙(8-2n)H<sub>2</sub>O. The hydration process of HMC is controlled by the concentration of the C<sub>6</sub>H<sub>6</sub>O<sub>7</sub><sup>2−</sup> ions. MgCl<sub>2</sub> could inhibit the ionization of HMC, thereby delaying the hydration progress of HMC. The second exothermic peak was delayed from 1 to 4.8 h with increased MgCl<sub>2</sub> content to 1.0 wt.%. The working performance of HMC-bonded castables could be improved by adding MgCl<sub>2</sub>. After adding MgCl<sub>2</sub>, the setting time, flow value, and cold modulus of rupture of HMC-bonded castables increased by 26.7%, 25.2%, and 8.8%, respectively, while the porosity decreased by 12%.</p>\",\"PeriodicalId\":13903,\"journal\":{\"name\":\"International Journal of Applied Ceramic Technology\",\"volume\":\"22 1\",\"pages\":\"\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-08-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Applied Ceramic Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/ijac.14894\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Applied Ceramic Technology","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ijac.14894","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Hydration mechanism of hydrated magnesium citrate: The effects of MgCl2
In this study, the evolutions of kinetic parameters, such as hydration temperature, pH, and electrical conductivity, were observed to investigate the hydration mechanism of hydrated magnesium citrate (HMC). Additionally, the effects of MgCl2 on the hydration behavior of HMC and the working performance of its bonded castables were also investigated. The results show that the hydration mechanism of HMC is dissolution–precipitation, and its hydration product is magnesium citrate tetrahydrate [Mg(H2O)6] [MgC6H5O7(H2O)n]2∙(8-2n)H2O. The hydration process of HMC is controlled by the concentration of the C6H6O72− ions. MgCl2 could inhibit the ionization of HMC, thereby delaying the hydration progress of HMC. The second exothermic peak was delayed from 1 to 4.8 h with increased MgCl2 content to 1.0 wt.%. The working performance of HMC-bonded castables could be improved by adding MgCl2. After adding MgCl2, the setting time, flow value, and cold modulus of rupture of HMC-bonded castables increased by 26.7%, 25.2%, and 8.8%, respectively, while the porosity decreased by 12%.
期刊介绍：
The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas:
Nanotechnology applications;
Ceramic Armor;
Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors);
Ceramic Matrix Composites;
Functional Materials;
Thermal and Environmental Barrier Coatings;
Bioceramic Applications;
Green Manufacturing;
Ceramic Processing;
Glass Technology;
Fiber optics;
Ceramics in Environmental Applications;
Ceramics in Electronic, Photonic and Magnetic Applications;
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