Development of a New Solution Growth Method for AlN Single Crystals Using Type 430 Ferritic Stainless Steel Flux

IF 3.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Crystal Growth & Design Pub Date : 2024-06-13 DOI:10.1021/acs.cgd.4c00329

Sen Li, Masayoshi Adachi, Makoto Ohtsuka and Hiroyuki Fukuyama*,

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Abstract

The solution growth method is an economical and environmentally friendly approach to producing aluminum nitride (AlN) single crystals. However, the fluxes used in the solution growth method have low nitrogen solubility, which limits the growth rate of AlN. In this study, as part of the development of a solution growth method for AlN using Fe–Cr fluxes with high nitrogen solubility, experiments were conducted using type 430 ferritic stainless steel, which is composed mainly of Fe–Cr, as the flux. Through a series of experiments, we report the results of the optimization of various experimental growth parameters (AlN polarity, cooling rate, and growth temperature). Furthermore, a growth mechanism based on the Al:N ratio in the flux is proposed, introducing the concept of effective nitrogen content to explain how the growth temperature affects the AlN growth rate using Fe–Cr flux.

A novel solution growth method for AlN single crystals using type 430 ferritic stainless steel flux was investigated. The growth conditions were optimized, and the growth mechanism was proposed.

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使用 430 型铁素体不锈钢助焊剂开发新的 AlN 单晶溶液生长方法

溶液生长法是生产氮化铝（AlN）单晶体的一种经济、环保的方法。然而，溶液生长法中使用的助熔剂氮溶解度低，限制了氮化铝的生长速度。在本研究中，作为开发使用氮溶解度高的 Fe-Cr 助熔剂的氮化铝固溶生长方法的一部分，我们使用主要由 Fe-Cr 组成的 430 型铁素体不锈钢作为助熔剂进行了实验。通过一系列实验，我们报告了各种实验生长参数（AlN 极性、冷却速率和生长温度）的优化结果。此外，我们还提出了一种基于助熔剂中 Al:N 比率的生长机制，并引入了有效氮含量的概念，以解释生长温度如何影响使用铁铬助熔剂的 AlN 生长速率。对生长条件进行了优化，并提出了生长机理。

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来源期刊

Crystal Growth & Design 化学-材料科学：综合

CiteScore

6.30

自引率

10.50%

发文量

650

审稿时长

1.9 months

期刊介绍： The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials. Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.