Nanometer magnesia is becoming the ages'focus due to its special property,extensive use,wide industrial foreground and big economic potential.

AimIn order to avoid agglomeration and get dispersible nanometer magnesia particles in the process of preparation with liquid phase method.

This paper has summarized the Sol-Gel technologies of preparation for nanometer magnesia powder in the recent years,and the development of this method was discussed in details.

Review on nano-magnesia preparation technology;

The influence of various factors,such as reactant concentration,reactive temperature,ratio of reactants,dripping time and rotate speed of propellers,on yield of the product are studied,and the more appropriate process parameters of preparating nano-magnesia are obtained prim.

Ba-doped nano-magnesia(Ba-MgO) was prepared by the chemical co-precipitation method using ultrasonic technique,and a Ru catalyst was prepared using this Ba-doped nano-magnesia as the support and Ru3(CO)12 as the Ru precursor by impregnation.

A new method for preparing high purity nano-sized magnesium oxide by liquid precipitation method with raw magnesite,industrial ammonium sulfate and ammonium carbonate as raw materials and self-made compound surfactants is introduced.

Surface modification of activated carbon fiber by nanometer MgO;

The optimum process conditions for the surface modification of nanometer MgO with titanate coupling agent as modifier are detemined as following:the dosage of modifier 3%～5%(weight%),time 2 h,rotary speed of ball miller 240～300 r/min.

Since nano-MgO was prepared in the 1980s, nano-MgO has attracted manymaterial researchers because of its extensive application foreground.

Microwave technique was introduced to prepare nano-MgO which acted as thesupport of Ru-based catalyst for ammonia synthesis in this paper.

Nano-MgO can be used in the field of thermodynamics, optics, electric, mechanics and chemistry etc, which is different from ordinary MgO.