Method for sintering industrial magnesium hydroxide powder

Abstract

The invention relates to a method for sintering industrial magnesium hydroxide powder, belongs to the technical field of preparation of a functional inorganic material and relates to determination of a process route for sintering high-purity magnesium oxide for a color flat plasma television protective film. The method is characterized by comprising the following steps of: carrying out simple pretreatment on industrial magnesium hydroxide serving as a raw material and controlling the heating rate, the constant temperature time and the heating curve to control the reaction process for generating the magnesium oxide. The method has simple process of the whole preparation process, readily available raw material, simple process and no waste discharge, belongs to the environment-friendly technology and more importantly makes the generation condition of pure-phase magnesium oxide milder and easily controlled. The technical route solves a series of problems caused by the conventional industrial sintering method, such as a large amount of dust generated in the sintering process, and needs to add a dust recovering device, so that the efficiency is lower and the cost is increased. The method has the advantages of obvious competitive advantage and profit space in the aspects of production cost, product performance, environment-friendly property and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional inorganic materials, and relates to a preparation method of high-purity oxides, in particular to the determination of a high-purity magnesium oxide sintering process route for a protective film of a color flat-panel plasma TV. Background technique [0002] Magnesium oxide (MgO) is widely used in many fields such as electronic components and advanced ceramic materials, especially in the new generation of plasma flat panel display (PDP), its performance directly affects the working characteristics and life of PDP. At present, the purity of magnesium hydroxide and magnesium oxide products produced in batches in China is usually below 99%, but the content of metal impurity ions, especially the content of metal impurity ions such as Al, Si, Fe, B, Ni, etc., seriously exceeds the standard. Although in recent years through the improvement of preparation methods, including the applicatio...

AI Technical Summary

Problems solved by technology

Although in recent years through the improvement of preparation methods, including the application of vacuum evaporation method, liquid phase precipitation method, sol-gel method and vapor phase deposition method, the impurity content of metal ions has been controlled to a certain extent, but more non-metallic ions have been introduced. Pollution, which has a very adverse effect on the crystallization tendency and fine structure control of the plasma flat panel display (PDP) coating, and indirectly reduces the service life of the plasma flat panel display (PDP)

More importantly, as the content of non-metallic ions in industrial grade magnesium hydroxide increases, the powder will scatter during the process of sintering into magnesium oxide, and the manufacturer has to increase the dust removal device to ensure the working environment and the loss of raw materials. This in turn increases production costs