(中南大学 粉末冶金国家重点实验室，长沙410083)
摘 要: 分别以聚丙烯酸铵(NH4PAA)和海因环氧树脂为分散剂和凝胶剂，制备锆钛酸铅陶瓷浆料，研究分散剂及固相含量对浆料流变性能、生坯和烧结样品物理性能的影响。结果表明：当分散剂含量(质量分数)为0.6%时，浆料黏度最低；当固相含量(体积分数)高达57.5%时，浆料仍保持良好的流动性；当固相含量为55%时，陶瓷生坯和烧结坯的强度均达到最大值，分别为34.1和77.8 MPa；与传统模压成型工艺对比表明，采用凝胶注模成型工艺制备的样品具有更优异的物理和压电性能。
关键字: 凝胶注模成型；锆钛酸铅；水溶性环氧树脂；流变性
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The lead zirconate titanate slurry was prepared using polyacrylic acid amine (NH4PAA) and Hydantion epoxy resin as dispersant and gelling agent, respectively. The influences of the dispersant content and the solid loading on the rheological properties and physical properties of the green and sintered bodies were investigated. The results show that the viscosity of the slurry is the lowest when the dispersant content is 0.6% (mass fraction). The slurry maintains good fluidity as the solid loading reaches as high as 57.5% (volume fraction). The highest strengths of green and sintered bodies are 34.1 and 77.8 MPa, respectively, as the solid loading of the slurry is 55%. Compared with the die pressing, the gelcast sample exhibits better physical and piezoelectric properties.
Key words: gelcasting; lead zirconate titanate; soluble epoxy resin; rheological property
