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以烧结镁砂为主原料,分别以粒度20～60 nm的SiO2纳米粉、粒度20～40 nm的Fe2O3纳米粉和粒度50 nm的Al2O3纳米粉(纯度(w)均为99.9%)为添加剂,设计了添加剂加入量(w)分别为1%、3%、5%(其余为烧结镁砂)的9种试样。配料后,外加10%(w)的分散剂和5%(w)的丙酮,研磨10min后,以100 MPa压力制成2.54 mm×2.54 mm的试样,在电炉中以5℃.min-1的升温速度分别升温至1 300、1 500和1 620℃保温4 h,冷却后分析试样的体积密度、显气孔率、相
Sintered magnesia as the main raw material, SiO2 nanoparticles with particle size of 20 ~ 60 nm, Fe2O3 nano - particles with particle size of 20 ~ 40 nm and Al2O3 nano - particles with particle size of 50 nm (purity of 99.9%) were used as additives, 9 kinds of samples with additives (w) of 1%, 3% and 5% respectively (the rest are sintered magnesia) were designed. After the ingredients, plus 10% (w) of dispersant and 5% (w) of acetone, after grinding 10min, pressure of 100 MPa 2.54 mm × 2.54 mm sample, in an electric furnace at 5 ℃ .min- 1 heating rate were raised to 1 300,1 500 and 1 620 ℃ for 4 h, after cooling the sample was analyzed for bulk density, porosity, phase