堇青石加入方式对堇青石-莫来石窑具材料性能的影响

为满足锂离子电池正极材料烧成的需要,以堇青石、莫来石、高岭土和氧化铝为原料制备堇青石-莫来石窑具材料,研究了堇青石颗粒和细粉加入量对堇青石-莫来石窑具材料的常温性能、高温抗折强度和抗热震性的影响.并用XRD和SEM分析了试样烧后的物相变化与显微结构.结果表明:随着堇青石颗粒或细粉加入量从0到30％(质量分数),试样的线变化率、显气孔率、高温抗折强度增大,体积密度下降;而对常温抗折强度的影响不大,试样的耐压强度分别呈现下降或提高的趋势,试样的抗热震性先增加后降低,当堇青石颗粒含量为20％,细粉含量为20％时,试样的抗热震性最好.

Effect of Cordierite Addition on the Performance of Cordierite-Mullite Kiln Furniture Materials

Cordierite-mullite kiln furniture materials were prepared by using cordierite , mullite , kaoline and alumina micro-powder to meet the requirement of preparing Li-ion battery cathode materials .The effects of cordierite aggregate and powder additions on the cold performance , high temperature modulus of rupture and thermal shock resistance were studied .XRD and SEM were used to analyze the phase transformation and the microstructure of fired samples respectively . The results show that: As the cordierite aggregate or powder addition increasing from 0 to 30％, the permanent linear change , apparent porosity , high temperature modulus of rupture increase , but the cold modulus of rupture changed little;the cold crushing strength shows a tendency to decrease or increase respectively; Thermal shock resistance of samples increases then decreases .The optimal addition of cordierite aggregate and cordierite powder is 20％and 20％, respectively .