摘要
将中位径尺寸分别为0.98μm和2.72μm的两种氧化铝粉体采用级配混合的方式,制备了低粘度、高固相含量的氧化铝悬浮液。当粗、细粉比例按6∶4混合时,可以配制成固相体积分数高达65%的浆料,其最小粘度值小于1 Pa.s,能够满足凝胶注模成型的要求。在相同固相体积分数下,粗、细粉按6∶4混合的坯体具有最大的抗弯强度。而随着浆料固相体积分数的增大,坯体抗弯强度具有减小的趋势,但是其最低强度仍可满足机械加工的要求。
Al2O3 suspensions with low viscosity and high solid content were prepared by mixing two alumina powders with different particle size(d50≈0.98 and 2.72 μm) in proper mass ratios.The results showed that the suspension with a solid content as high as 65 vol% can be got by mixing alumina powders with mass ratio of coarse particles to fine as 6∶4,which prossess the minimum viscosity less than 1 Pa·s and are suitable for gelcasting forming process.The strength of green body with the same solid volume loading is highest in the case of 60% coarse particles in the mixed powder.The strength of green body decreases as the soliding volume loading of suspensions increasing,which is still readily for green machined.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2009年第S1期211-214,共4页
Journal of Synthetic Crystals
