Addition Of Magnesium Hydroxide Research Articles

Fabrication of lotus-type porous aluminum using thermal decomposition of magnesium hydroxide

Lotus-type porous aluminium was fabricated using a thermal decomposition of magnesium hydroxide in a vacuum. The effect of addition of magnesium hydroxide on the porosity and the average pore diameter were investigated. The hydrogen dissolved in molten aluminum through thermal decomposition of magnesium hydroxide when the melt solidified evolves pores. Furthermore, magnesia formed through thermal decomposition of magnesium hydroxide in the melt serves as nucleation sites for the pores. The porosity and the number of the pores increase with increasing amount of magnesium hydroxide, and the average pore diameter is not much varied with amount of magnesium hydroxide.

클로로프렌 고무의 난연성 및 내방사선 특성 향상

This study has investigated radiation degradation of chloroprene rubber in the presence of some fire retardant. Ammonium polyphosphate, aluminium trihydroxide, magnesium hydroxide, calcium carbonate and antimony trioxide were selected as flame retardant. Samples were irradiated using a Co<TEX>$^{60}$</TEX> <TEX>${\gamma}$</TEX> -ray and ray up to 2000 kGy at a dose rate of 5 kGy/hr in the presence of air atmosphere at room temperature. After irradiation, samples were assessed fire retardancy with electrical properties and mechanical properties. Some considerations concerning the effects of the fire retardants added to chloroprene rubber on the radiation and thermal stability of chloroprene rubber are presented. From fire retardancy with electrical and mechanical property measurements, it was found that addition of magnesium hydroxide resulted in maximum fire retardant effect.