Xudong Liu, Lei Wang, Huiyun Yan, X. Bi, Xudong Sun
{"title":"Verneuil生长SrTiO3晶体生长室温度分布的有限元模拟","authors":"Xudong Liu, Lei Wang, Huiyun Yan, X. Bi, Xudong Sun","doi":"10.1002/crat.202000185","DOIUrl":null,"url":null,"abstract":"The work demonstrates combustion characteristics in growth chamber for Verneuil‐grown SrTiO3 crystal with two‐tube burner. Finite element (FE) simulation is performed to analyze the temperature distribution and its influencing factors. The central oxygen flows outward along the radial direction and reacts to hydrogen surrounding crystal, and the best ratio of hydrogen and oxygen is 2.5. The ratio less than 2.5 leads to increasing the center temperature of molten cap and greater than 2.5 leads to increasing the temperature around the molten cap, which probably causes the overflow problem. The surface temperature of molten cap increases first and then decreases gradually with the decreasing nozzle aperture of oxygen. The best diameter of nozzle aperture of oxygen is 4.5 mm. The surface temperature of molten cap is mainly related to the diameter of oxygen nozzle and the flow rate of oxygen. This work opens the stable growth process and the possibility for the industrial growth of large high quality SrTiO3 single crystals.","PeriodicalId":10797,"journal":{"name":"Crystal Research and Technology","volume":"19 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Finite Element Simulation of Temperature Distribution in Growth Chamber for Verneuil‐Grown SrTiO3 Crystal\",\"authors\":\"Xudong Liu, Lei Wang, Huiyun Yan, X. Bi, Xudong Sun\",\"doi\":\"10.1002/crat.202000185\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The work demonstrates combustion characteristics in growth chamber for Verneuil‐grown SrTiO3 crystal with two‐tube burner. Finite element (FE) simulation is performed to analyze the temperature distribution and its influencing factors. The central oxygen flows outward along the radial direction and reacts to hydrogen surrounding crystal, and the best ratio of hydrogen and oxygen is 2.5. The ratio less than 2.5 leads to increasing the center temperature of molten cap and greater than 2.5 leads to increasing the temperature around the molten cap, which probably causes the overflow problem. The surface temperature of molten cap increases first and then decreases gradually with the decreasing nozzle aperture of oxygen. The best diameter of nozzle aperture of oxygen is 4.5 mm. The surface temperature of molten cap is mainly related to the diameter of oxygen nozzle and the flow rate of oxygen. This work opens the stable growth process and the possibility for the industrial growth of large high quality SrTiO3 single crystals.\",\"PeriodicalId\":10797,\"journal\":{\"name\":\"Crystal Research and Technology\",\"volume\":\"19 1\",\"pages\":\"\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2021-03-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Crystal Research and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/crat.202000185\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CRYSTALLOGRAPHY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Crystal Research and Technology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/crat.202000185","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CRYSTALLOGRAPHY","Score":null,"Total":0}
Finite Element Simulation of Temperature Distribution in Growth Chamber for Verneuil‐Grown SrTiO3 Crystal
The work demonstrates combustion characteristics in growth chamber for Verneuil‐grown SrTiO3 crystal with two‐tube burner. Finite element (FE) simulation is performed to analyze the temperature distribution and its influencing factors. The central oxygen flows outward along the radial direction and reacts to hydrogen surrounding crystal, and the best ratio of hydrogen and oxygen is 2.5. The ratio less than 2.5 leads to increasing the center temperature of molten cap and greater than 2.5 leads to increasing the temperature around the molten cap, which probably causes the overflow problem. The surface temperature of molten cap increases first and then decreases gradually with the decreasing nozzle aperture of oxygen. The best diameter of nozzle aperture of oxygen is 4.5 mm. The surface temperature of molten cap is mainly related to the diameter of oxygen nozzle and the flow rate of oxygen. This work opens the stable growth process and the possibility for the industrial growth of large high quality SrTiO3 single crystals.
期刊介绍：
The journal Crystal Research and Technology is a pure online Journal (since 2012).
Crystal Research and Technology is an international journal examining all aspects of research within experimental, industrial, and theoretical crystallography. The journal covers the relevant aspects of
-crystal growth techniques and phenomena (including bulk growth, thin films)
-modern crystalline materials (e.g. smart materials, nanocrystals, quasicrystals, liquid crystals)
-industrial crystallisation
-application of crystals in materials science, electronics, data storage, and optics
-experimental, simulation and theoretical studies of the structural properties of crystals
-crystallographic computing
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