矾土基Al_2O_3-SiO_2系浇注料基质浆体动电特性与流变特性的研究
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摘要
耐火浇注料的作业性能与原料和基质浆体的动电特性、流变性能紧密相关。研究原料和基质浆体的动电特性和流变性能,对于改善不定形耐火材料的作业性,提高施工效率,进而改善使用性能有着十分重要的意义。为此,采用美国Colloidal Dynamics公司生产的ZetaProbe型浓浆流变仪和Brookfield公司产的R/S-SST软固体流变仪,针对矾土基Al2O3-SiO2系浇注料,对特级矾土粉、α-Al2O3微粉、SiO2微粉、铝酸盐水泥等不同原料及其不同固含量的Zeta电位和流变性能,以及加入三聚磷酸钠、六偏磷酸钠、SM和FDN等分散剂后原料浆体的Zeta电位和流变性能进行了测定;同时对不同基质组成和分散剂对基质的Zeta电位和流变性能的影响进行了研究。通过以上研究,对矾土基Al2O3-SiO2系浇注料所用的主要原料和基质的浆体特性(Zeta电位和流变性能)有了更深入的了解,同时发现:(1)4种分散剂三聚磷酸钠、六偏磷酸钠、SM、FDN对原料和基质浆体的Zeta电位和流变性能都有较明显的改善作用,其中,三聚磷酸钠最好,六偏磷酸钠次之,SM、FDN的作用较前两种有所减弱;(2)所研究浆体的Zeta电位和流变性能有较好的对应关系:即Zeta电位绝对值越大,浆体的粘度越低,浆体稳定性越好;Zeta电位绝对值越小,浆体的粘度越高,浆体处于絮凝不稳定状态。
Flowability of castables is correlative with the fluidity of the suspensions of raw materials and their matrix. It is important to investigate effects of raw materials, solid content and dispersant additions on rheological properties of raw material and matrix suspensions for the sake of improvement of workability, properties and service performance of the castables. Zeta potential values of raw material including bauxite, ultra-fineα-Al2O3, ultra-fine SiO2, aluminate cement used in the bauxite based castables, and the effects of concentrations and additions of dispersants including sodium tripolyphosphate (STP), sodium hexametaphosphate (SHP), cyanuramide(SM), calcium lignosulfonate(FDN) on Zeta potential of the suspensions were investigated by means of ZetaProbe Zeta potential tester by Colloidal Dynamics for concentrated colloids. Meanwhile, rheological properties of the suspensions of raw material, matrix and with additions of dispersants were determined by means of SST viscometer by Brookfield. The results show that: (1) Among the four dispersants tested, STP shows the best dispersing effect both for raw materials suspensions and matrix suspensions, while SHP takes second place, SM and FDN show almost same and a little less effects. (2) Zeta potential values and rheological properties of the suspensions investigated indicate good corresponding relation other. With higher absolute values of Zeta potential of the suspensions, lower viscosity and better stability of the suspensions are obtained. Otherwise, when absolute values of Zeta potential are lower, the suspensions are viscous and unstable.
Flowability of castables is correlative with the fluidity of the suspensions of raw materials and their matrix. It is important to investigate effects of raw materials, solid content and dispersant additions on rheological properties of raw material and matrix suspensions for the sake of improvement of workability, properties and service performance of the castables. Zeta potential values of raw material including bauxite, ultra-fineα-Al2O3, ultra-fine SiO2, aluminate cement used in the bauxite based castables, and the effects of concentrations and additions of dispersants including sodium tripolyphosphate (STP), sodium hexametaphosphate (SHP), cyanuramide(SM), calcium lignosulfonate(FDN) on Zeta potential of the suspensions were investigated by means of ZetaProbe Zeta potential tester by Colloidal Dynamics for concentrated colloids. Meanwhile, rheological properties of the suspensions of raw material, matrix and with additions of dispersants were determined by means of SST viscometer by Brookfield. The results show that: (1) Among the four dispersants tested, STP shows the best dispersing effect both for raw materials suspensions and matrix suspensions, while SHP takes second place, SM and FDN show almost same and a little less effects. (2) Zeta potential values and rheological properties of the suspensions investigated indicate good corresponding relation other. With higher absolute values of Zeta potential of the suspensions, lower viscosity and better stability of the suspensions are obtained. Otherwise, when absolute values of Zeta potential are lower, the suspensions are viscous and unstable.
引文
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[12]王瑞刚,吴厚政,陈玉如,等,陶瓷料浆稳定分散进展,陶瓷学报,1999,20(1):35~40
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[15]沈一丁,李小瑞,陶瓷结合剂,化学工业出版社,75~110
[16]张海军,贾晓林,刘战杰,等,纳米A12O3-SiO2的分散及颗粒间力的相互作用,硅酸盐学报,2003,31(10):928~939
[17]李纯成,丘泰,焦宝祥,等,氧化锆增韧氧化铝陶瓷悬浮体的流变性能,硅酸盐学报,2005,33(3):287~291
[18]马景陶,谢志鹏,黄勇,等,水溶性高分子聚丙烯酰胺对氧化铝注凝成型的影响,硅酸盐学报,2002,30(6):716~720
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[20]仇家良,郭露村,水基明胶-氧化铝浆料的流变及注凝特性,中国陶瓷,2006,42(3):32~35
[21]张立明,马天,杨金龙,等,氧化铝悬浮液剪切流变特性的研究,无机材料学报,2004,19(5):1145~1150
[22]李登好,郭露村, a-A12O3-H2O-聚丙烯酸悬浮液流变性的研究,硅酸盐学报,2004,32(1):80~84
[23]周丽敏,郭露村,分散剂对超细a-A12O3浆料流变性的影响,硅酸盐学报,2003,31(11):1075~1079
[24]宋贤良,陈玲,叶建东,等,不同颗粒尺寸α-Al2O3粉体制备稳定浆料的研究,硅酸盐学报,2003,31(7);702~706
[25]陈友强,张新霓,陈沙鸥,等,共聚物型分散剂对α-Al2O3水悬浮体系分散性能的影响,硅酸盐学报,2005,33(2):170~174
[2]王燕民,李新衡,湿法超细研磨中无机材料浆体的流变性研究,硅酸盐学报,2006,34(5):585~592
[3]陈礼永,袁继祖,陶瓷浆料稳定机理的研究,中国陶瓷,1995,31(3)
[4]关岩,张芸,无机添加剂在陶瓷浆料中的应用,鞍山钢铁学院学报,2002,25(6)
[5]郭小龙,陈沙鸥,戚凭,等,纳米陶瓷粉末分散的微观过程和机理,青岛大学学报,2002,15(1):78~88
[6] Wang Zhanmin, Zhang Sanhua, Zhu Cuiliang, et al. Comparison of different grades of Microsilica and their influence on properties of self-flow mullite castable. Proceedings of international symposium on refractocries, 1996, Haikou, 465~472
[7]薛文东,孙荣国,孙加林,等,分散剂对刚玉-氮化硅浆体流变性能的影响,耐火材料,2005,39(3):165~167
[8]贾全利,叶方保,钟香崇,粒度分布对超低水泥刚玉质浇注料流变性的影响,耐火材料2004,38 (3 ):168~171
[9]张战营,孙承绪,陈飞跃,等,氧化铝微粉-水浓悬浮液流变行为的研究,华东理工大学学报,1999,25(1):90~93
[10]王国庭,胶体稳定性,北京:科学出版社,1990
[11]王正烈,《物理化学》教学提要第十八讲胶体化学,化工高等教育,2002,(4):81~82
[12]王瑞刚,吴厚政,陈玉如,等,陶瓷料浆稳定分散进展,陶瓷学报,1999,20(1):35~40
[13]沈钟,赵振国,王国庭,胶体与表面化学,第3版.北京:化学工业出版社,2004
[14]徐燕莉,表面活性剂的功能,化学工业出版社,北京:193~236
[15]沈一丁,李小瑞,陶瓷结合剂,化学工业出版社,75~110
[16]张海军,贾晓林,刘战杰,等,纳米A12O3-SiO2的分散及颗粒间力的相互作用,硅酸盐学报,2003,31(10):928~939
[17]李纯成,丘泰,焦宝祥,等,氧化锆增韧氧化铝陶瓷悬浮体的流变性能,硅酸盐学报,2005,33(3):287~291
[18]马景陶,谢志鹏,黄勇,等,水溶性高分子聚丙烯酰胺对氧化铝注凝成型的影响,硅酸盐学报,2002,30(6):716~720
[19]刘阳桥,高濂,亚微米A12O3浆料的流变性优化研究,无机材料学报,2003,18(6):1199~1204
[20]仇家良,郭露村,水基明胶-氧化铝浆料的流变及注凝特性,中国陶瓷,2006,42(3):32~35
[21]张立明,马天,杨金龙,等,氧化铝悬浮液剪切流变特性的研究,无机材料学报,2004,19(5):1145~1150
[22]李登好,郭露村, a-A12O3-H2O-聚丙烯酸悬浮液流变性的研究,硅酸盐学报,2004,32(1):80~84
[23]周丽敏,郭露村,分散剂对超细a-A12O3浆料流变性的影响,硅酸盐学报,2003,31(11):1075~1079
[24]宋贤良,陈玲,叶建东,等,不同颗粒尺寸α-Al2O3粉体制备稳定浆料的研究,硅酸盐学报,2003,31(7);702~706
[25]陈友强,张新霓,陈沙鸥,等,共聚物型分散剂对α-Al2O3水悬浮体系分散性能的影响,硅酸盐学报,2005,33(2):170~174