CAJ | 학술논문

以平均粒径20μm 的球状氧化铝为主要原料，去离子水为溶剂，羧甲基纤维素钠为增稠剂（外加质量分数为1％），分别以三聚磷酸钠、六偏磷酸钠、柠檬酸铵为分散剂，变化三种分散剂不同的加入量，制备了三种α-Al2 O3悬浮液。通过测量三种悬浮液沉降1 h 后的沉降量，确定最佳分散剂种类及加入量。选用最佳分散剂及最佳加入量对应的悬浮液为研究对象，在不同 pH 下测量对应的 Zeta 电位，确定最佳 pH；选用最佳分散剂、最佳加入量及最佳 pH 对应悬浮液为研究对象，在不同固含量条件下，测定对应的黏度值，确定最佳固含量。结果表明：不同的分散剂有着不同的分散效果，其中，六偏磷酸钠对悬浮液的稳定效果最好；当六偏磷酸钠的加入量（w）为0．8％～1．0％时，悬浮液沉降量最低，分散效果最好；悬浮液 pH 为10时，其 Zeta 电位最低，稳定性最好；悬浮液固含量为60％（w）时，黏度最低，稳定性最佳。
이평균립경20μm 적구상양화려위주요원료，거리자수위용제，최갑기섬유소납위증주제（외가질량분수위1％），분별이삼취린산납、륙편린산납、저몽산안위분산제，변화삼충분산제불동적가입량，제비료삼충α-Al2 O3현부액。통과측량삼충현부액침강1 h 후적침강량，학정최가분산제충류급가입량。선용최가분산제급최가가입량대응적현부액위연구대상，재불동 pH 하측량대응적 Zeta 전위，학정최가 pH；선용최가분산제、최가가입량급최가 pH 대응현부액위연구대상，재불동고함량조건하，측정대응적점도치，학정최가고함량。결과표명：불동적분산제유착불동적분산효과，기중，륙편린산납대현부액적은정효과최호；당륙편린산납적가입량（w）위0．8％～1．0％시，현부액침강량최저，분산효과최호；현부액 pH 위10시，기 Zeta 전위최저，은정성최호；현부액고함량위60％（w）시，점도최저，은정성최가。
Three kinds of α-Al 2 O3 suspension were prepared using spherical alumina with an average particle size of 20 μm as the raw material,deionized water as the solvent,sodium carboxymethyl cellulose as the thickener (extra adding 1 mass%),sodium tripolyphosphate,sodium hexametaphosphate,ammonium citrate as the dispersants,varying the dosage of the three dispersants.The sedimentation amounts of the three kinds of suspension after 1 h sedimentation were measured to find the optimal dispersant and its addition;then the best pH value was determined according to Zeta potential;finally,the solid content was optimized according to the viscosity.The results show that:different dispersants have different dispersion effects,the suspension with sodium hexametaphosphate has the best stability;when the sodium hexametaphosphate ad-dition is 0.8 mass% -1.0 mass%,the sedimentation amount is the lowest and the dispersion is the best;when the pH value of the suspension is 10,the Zeta potential is the lowest and the suspension has the best stability;when the solid content of the suspension is 60 mass%,the viscosity is the lowest and the stability is the best.