添加活性炭烧结氧化镁泡沫陶瓷

摘要

氧化镁泡沫陶瓷烧结温度很高,为了降低它的烧结温度,对其制备技术进行了研究.设计了以氧化镁为基体的粉料,采用有机泡沫浸渍工艺制备了氧化镁泡沫陶瓷,研究了不添加活性炭和添加活性炭对烧结温度的影响.当活性炭质量分数为0.1%时,泡沫陶瓷烧结温度由1550℃降到1500℃,体积质量由0.926 g/cm3上升到0.977 g/cm3.XRD结果表明,添加活性炭并未改变氧化镁的晶格结构;SEM显微分析表明,添加的活性炭在陶瓷中未有残留.粗镁浇注实验结果说明,添加活性炭烧结而成的氧化镁泡沫陶瓷具有良好的过滤能力.%The sintering temperature of magnesia foamed ceramic (MFC) is extremely high. In order to decrease its sintering temperature, the fabricating technology of MFC was studied. MgO powder was taken as the matrix powder, and the polymeric sponge dipping technology was adopted to fabricate MFC. The influence of active carbon on sintering temperature was studied. The experimental results show that when the mass fraction of active carbon is 0. 1％, the sintering temperature of MFC decreases from 1 550 ℃ to 1 500 ℃,and its bulk density raises from 0. 926 g/cm3 to 0. 977 g/cm3. The XRD analysis shows that the addition of active carbon does not change the crystal structure of magnesia. The SEM analysis reveals that there is no residual active carbon in MFC. The results of crude magnesium pouring test show that MFC with adding active carbon exhibits a good filtering ability.