Rod-Like Magnesium Hydroxide Preparation

Magnesium hydroxide rods were synthesized using MgCl2 and NaOH as the raw materials. The influences of the concentration of NaOH, the aging time and the aging temperature on the morphology modification of Mg(OH)2 were investigated. The obtained magnesium hydroxide (MH) particles were characterized in terms of morphology, particle size and crystal habit by scanning electron microscopy (SEM),high resolution transmission electron microscopy (HRTEM), X-ray diffraction(XRD), thermal stability by thermogravimetric analyses(TG). The results show that when the aging temperature is 90 ℃, the obtained magnesium hydroxide rods are better crystalline with the increase of the concentration of NaOH and aging time; when the aging temperature is 120 ℃, the morphology of the obtained magnesium hydroxide is mainly lamellar and the rod-like magnesium hydroxide particles could not be obtained.