用于 LED 应用的 HPA 制备的一步燃烧法

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
P. Nayar, P. Yadav, U. Singh, A. Agnihotri
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引用次数: 0

摘要

摘要 氧化铝(Al2O3)具有优异的物理和化学特性,包括高耐热性、优异的电气绝缘性、耐磨性和高耐腐蚀性,因此被广泛应用于各种领域。一般来说,氧化铝的纯度在 99.6-99.9% 之间,主要是以铝土矿为起始原料,通过拜耳工艺制造而成。它主要用于耐火产品、火花塞、集成电路基板等。高纯氧化铝(HPA)的纯度在 99.99% 以上,颗粒均匀细小,广泛用于高压钠灯的半透明管、手表盖的蓝宝石等单晶材料、高强度陶瓷工具、磁带磨料等。近年来,高纯氧化铝的需求在不断扩大,预计将在显示材料、能源、汽车、半导体和计算机等领域呈现高速增长。文献报道了几种生产单相 α-HPA 的复杂工艺,这些工艺能耗和电耗较高,成本也很高。本文报道了一种简单、经济、快速的方法,即一步自动燃烧法,制备出纯度为 3N (99.9%) 的纳米 α 氧化铝粉末。要获得单相α-氧化铝,煅烧温度需要 1200°C,但在我们的工作中,我们通过一步自动燃烧法在 500°C 温度下获得了单相α-氧化铝。我们通过 XRD、BET 表面积、SEM 以及 ICP、TGA 和 LIBS 对制备的 HPA 进行了表征,以检测其纯度及其在 LED 制造中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

One-Step Combustion Method of HPA Preparation for LED Applications

One-Step Combustion Method of HPA Preparation for LED Applications

One-Step Combustion Method of HPA Preparation for LED Applications

Alumina (Al2O3) is widely used in a variety of applications because it has superior physical and chemical properties which are high heat resistance, excellent electrical isolation, abrasion resistance, and high corrosion resistance. Generally, alumina is manufactured with a purity of 99.6–99.9% mainly by the Bayer process with bauxite as the starting material. It is used in refractory products, spark plugs, IC substrates, and so on. High-purity alumina (HPA), which has a purity of more than 99.99% and has a uniform fine particle, is widely used in translucent tubes for high-pressure sodium lamps, single crystal materials such as sapphires for watch covers, high-strength ceramic tools, abrasives for magnetic tape, and the like. In recent years, the demand for high-purity alumina has been expanding in fields that are expected to show a high growth rate e.g., display materials, energy, automobiles, semiconductors, and computers. There are several complicated processes reported in literature to produce single phase α-HPA, which consumes more energy, and power and are very costly. In this paper, we report the preparation of nano-α alumina powders with a purity of 3N (99.9%) by a simple, economical, and faster method i.e., one-step auto combustion method. To obtain single phase α-alumina, the calcination temperature required is 1200°C but, in our work, we achieved single phase α-alumina at 500°C temperature by one-step auto combustion method. The as-prepared HPA is characterized through XRD, BET surface area, SEM and ICP, TGA, and LIBS to test for purity and its application in LED fabrication.

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来源期刊
CiteScore
1.00
自引率
33.30%
发文量
27
期刊介绍: International Journal of Self-Propagating High-Temperature Synthesis  is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.
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