Adsorption Mechanism of Dispersant PMAA-NH4 on BaTiO3

Journal of Inorganic Materials

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Adsorption Mechanism of Dispersant PMAA-NH₄ on BaTiO₃

ZHAO Jiu-Peng¹; LI Yao²; QIANG Liang-Sheng¹; HAN Jie-Cai²

1. Department of Applied Chemistry; Harbin 150001; China; 2. Harbin Institute of Technology; Harbin 150001, China

Received:2001-07-18 Revised:2001-08-13 Published:2002-07-20 Online:2002-07-20

Abstract

Abstract: Adsorption mechanism of dispersant PMAA-NH₄ on BaTiO₃ was studied by using potential and FTIR spectrum. The results show that the positive charge, Ba-OH₂⁺, existing on the surface of BaTiO₃ adsorbs the negative ion of the dispersant. The surface charge of BaTiO₃ and its IEP from pH=5.1 to pH=3.5 change after the addition of PMAA-NH₄. When pH=10, the concentration of PMAA-NH₄ is 0.8wt%, the adsorption comes up to saturation and stabilized BaTiO₃ suspension can be obtained.

Key words: dispersant, BaTiO₃ suspension, adsorption

CLC Number:

TM534

ZHAO Jiu-Peng,LI Yao,QIANG Liang-Sheng,HAN Jie-Cai. Adsorption Mechanism of Dispersant PMAA-NH₄ on BaTiO₃[J]. Journal of Inorganic Materials.

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Adsorption Mechanism of Dispersant PMAA-NH₄ on BaTiO₃

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