Magnesium oxide thin films on Y-cut lithium niobate single crystal substrate are prepared by sol-gel processing then,a Mg-ion indiffusion process is applied to study its surface characteristics.

利用溶胶-凝胶工艺在Y切铌酸锂单晶基片衬底上制备薄膜，经离子内扩散后，进行了其表面改性研究。

Producing metal Mg with magnesia supported by electrolytical chloride is a new method and also a good method to be propitious to environment.

利用在质的支持下出金属是一种全新的生产方法,也是一种有利于环境保护的冶方法。

Metal hydroxides like aluminium trihydroxide (ATH) or magnesium dihydroxide (MDH) are commonly used halogen-free flame retardants in polyolefins.

金属如氢铝（ATH）或氢（MDH）是常用的无卤阻燃体系。

Magnesium Hydroxide flame retardment has some characteristics of retarding fire,reducing smoke,cheap priceand safe stuff etc,therefore,it is applied widely.

氢阻燃剂具有阻燃、硝烟、填充安全、价格低等特点岙被广泛开发研究。