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.

中文翻译：

---

细晶生长SrTiO3晶体生长室内温度分布的有限元模拟

这项工作展示了Verneuil生长的SrTiO ₃在生长室中的燃烧特性带有两管式燃烧器的晶体。进行了有限元（FE）仿真，以分析温度分布及其影响因素。中心氧沿径向向外流动并与晶体周围的氢反应，氢与氧的最佳比例为2.5。小于2.5的比率导致熔融盖的中心温度升高，而大于2.5的比率导致熔融盖的周围温度升高，这可能引起溢流问题。熔融盖的表面温度先升高，然后随着氧气喷嘴孔径的减小而逐渐降低。氧气喷嘴孔的最佳直径为4.5毫米。熔帽的表面温度主要与氧气喷嘴的直径和氧气的流量有关。₃个单晶。