(中南大學 粉末冶金國家重點實驗室，長沙410083)
摘 要: 分別以聚丙烯酸銨(NH4PAA)和海因環(huán)氧樹脂為分散劑和凝膠劑，制備鋯鈦酸鉛陶瓷漿料，研究分散劑及固相含量對漿料流變性能、生坯和燒結(jié)樣品物理性能的影響。結(jié)果表明：當分散劑含量(質(zhì)量分數(shù))為0.6%時，漿料黏度最低；當固相含量(體積分數(shù))高達57.5%時，漿料仍保持良好的流動性；當固相含量為55%時，陶瓷生坯和燒結(jié)坯的強度均達到最大值，分別為34.1和77.8 MPa；與傳統(tǒng)模壓成型工藝對比表明，采用凝膠注模成型工藝制備的樣品具有更優(yōu)異的物理和壓電性能。
關(guān)鍵字: 凝膠注模成型；鋯鈦酸鉛；水溶性環(huán)氧樹脂；流變性
（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
