Verneuil生长SrTiO3晶体生长室温度分布的有限元模拟

IF 1.5 4区材料科学 Q3 CRYSTALLOGRAPHY

Crystal Research and Technology Pub Date : 2021-03-22 DOI:10.1002/crat.202000185

Xudong Liu, Lei Wang, Huiyun Yan, X. Bi, Xudong Sun

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引用次数: 0

摘要

研究了用双管燃烧器在Verneuil生长的SrTiO3晶体生长室内的燃烧特性。通过有限元模拟分析了温度分布及其影响因素。中心氧沿径向向外流动，与晶体周围的氢发生反应，最佳氢氧比为2.5。小于2.5会导致熔帽中心温度升高，大于2.5会导致熔帽周围温度升高，可能会导致溢流问题。随着氧气喷嘴孔径的减小，熔帽表面温度先升高后逐渐降低。氧气喷嘴孔径的最佳直径为4.5 mm。熔帽表面温度主要与氧气喷嘴直径和氧气流量有关。本工作为高质量SrTiO3单晶的稳定生长过程和工业生长提供了可能。

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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.

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来源期刊

Crystal Research and Technology 化学-晶体学

自引率

6.70%

发文量

121

审稿时长

1.9 months

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