(中南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 研究分散劑聚丙烯酸銨(NH4PAA)加入量、pH值、固相體積分?jǐn)?shù)、球磨時(shí)間和離子強(qiáng)度對Al2O3陶瓷懸浮液黏度和沉降高度的影響。結(jié)果表明：分散劑加入量、pH值、固相體積分?jǐn)?shù)、球磨時(shí)間和離子強(qiáng)度均對懸浮液的分散穩(wěn)定性有顯著影響。當(dāng)分散劑加入量為0.8%(質(zhì)量分?jǐn)?shù))、pH為9.5、固相體積分?jǐn)?shù)為50%、球磨時(shí)間為24 h時(shí)、離子強(qiáng)度為0時(shí)，懸浮液的黏度和沉降高度達(dá)到最小值，分散穩(wěn)定性達(dá)到最佳。
關(guān)鍵字: Al2O3；懸浮液；黏度；沉降高度；分散劑；pH值
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The effects of the dispersant ammonium poly-acrylate (NH4PAA) content, pH value, volume fraction of solid phase, ball milling time and ionic strength on the viscosity and sedimentation height of Al2O3 suspension were examined in detail. The results show that the ammonium poly-acrylate (NH4PAA) content, pH value, volume fraction of solid phase, ball milling time and ionic strength significantly influence the dispersion and stability behavior of Al2O3 suspension. The viscosity and sedimentation height achieve the minimum value at dispersant content of 0.8% (mass fraction), pH value of 9.5, volume fraction of solid phase of 50%, ball milling time of 24 h, and then dispersion and stability behavior achieves the best value.
Key words: Al2O3; suspension; viscosity; sedimentation height; dispersant; pH value
