Effects of Calcine Temperature on the Thermal Stability of Calcine Product Obtained from Magnesium-aluminum Hydrotalcites
SHANGGUAN Rong chang (Department of Chemistry, Huaiyin Teachers College, Huaian, 223001, China)
Mg Al O mixed oxides(Mg/Al=3 mol/mol) derived from Hydrotalcite precursors ,it was synthesized by coprecipitation . It was detected by XRD, TG DTA and surface. It studies the effects of calcine temperature on the thermal stability of calcine product .The result shows that Mg Al O mixed oxides obtained from hydrotalcites own good thermostability. After calcine of 800℃ ,its BET's surface area still is 120m 2/g, the sample's pore diameter is about 18nm,what's more, it can't be effected by the calcine temperature.