| 分散剂用量对钛酸锶钡水基浆料稳定性的影响 |
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| 引用本文： | 李明利,梁辉,徐明霞,李晓雷,徐廷献,岳志峰.分散剂用量对钛酸锶钡水基浆料稳定性的影响[J].硅酸盐学报,2007,35(11):1453-1456. |
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| 作者姓名： | 李明利 梁辉 徐明霞 李晓雷 徐廷献 岳志峰 |
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| 作者单位： | 天津大学材料科学与工程学院,教育部先进陶瓷与加工技术重点实验室,天津,300072 |
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| 基金项目： | 天津市自然科学基金
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教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 使用聚甲基丙烯酸铵(ammonium polymethacrylate,PMAA-NH4)作为分散剂,研究了不同pH值条件下分散剂用量对钛酸锶钡(Ba0.6Sr0.4TiO3)水基浆料稳定性的影响,并分析了其影响机理.结果表明:PMAA-NH4的加入能够显著提高Ba0.6Sr0.4TiO3粉体的zeta电位,在加入量(质量分数,下同)为0.4%时,zeta电位为负值,达到最小,从而提高了Ba0.6Sr0.4TiO3水基浆料稳定性.在pH值小于8时,会发生Ba0.6Sr0.4TiO3料浆中的Ba2 和Sr2 离子溶出;pH值大于8时,Ba0.6Sr0.4TiO3粉体的zeta电位随PMAA-NH4的加入量的增加而增大.在pH值为8～9,PMAA-NH4的加入量为0.4%时,实现Ba0.6Sr0.4TiO3粉体对PMAA-NH4的饱和吸附,此时浆料的稳定性最好.
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| 关 键 词： | 钛酸锶钡浆料 分散剂 稳定性 聚甲基丙烯酸铵 |
| 文章编号： | 0454-5648（2007）11-1453-04 |
| 修稿时间： | 2007-06-06 |
EFFECT OF DISPERSANT CONCENTRATION ON STABILITY OF BARIUM STRONTIUM TITANATE SLURRY |
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| LI Mingli,LIANG Hui,XU Mingxia,LI Xiaolei,XU Tingxian,YUE Zhifeng.EFFECT OF DISPERSANT CONCENTRATION ON STABILITY OF BARIUM STRONTIUM TITANATE SLURRY[J].Journal of The Chinese Ceramic Society,2007,35(11):1453-1456. |
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| Authors: | LI Mingli LIANG Hui XU Mingxia LI Xiaolei XU Tingxian YUE Zhifeng |
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| Affiliation: | School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin 300072, China |
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| Abstract: | Using ammonium polymethacrylate (PMAA-NH4) as a dispersant for aqueous barium strontium titanate (Ba_(0.6)Sr_(0.4)TiO_3) slurry,the effects of dispersant concentration and pH value on the dispersion behavior of Ba_(0.6)Sr_(0.4)TiO_3 aqueous slurry were studied.The results show that PMAA-NH_4 can improve the stability of Ba_(0.6)Sr_(0.4)TiO_3 aqueous slurry by increasing the negative zeta potential.It is found that the barium and strontium ions are dissolved out from Ba_(0.6)Sr_(0.4)TiO_3 powders when the pH value is below 8. The zeta potential of the powders changes with the increase of concentration of PMAA-NH4 and the zeta potential is negative,and reaches the minimum when the concentration is 0.4% (in mass,the same below).The stability of slurry reaches a plateau when the concentration of PMAA-NH_4 is 0.4% with the pH value between 8 and 9. |
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| Keywords: | strontium barium titanate slurry dispersant stability ammonium polymethacrylate |
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