CHARACTERIZATION AND STABILIZATION OF SI3N4 SUSPENSIONS

被引：10

作者：

GALASSI, C

RASTELLI, E

RONCARI, E

ARDIZZONE, S

CATTANIA, MG

机构：

[1] UNIV MILAN,DEPT PHYS CHEM & ELECTROCHEM,I-20133 MILAN,ITALY

[2] UNIV MILAN,CSRSRC,CNR,I-20133 MILAN,ITALY

来源：

JOURNAL OF MATERIALS RESEARCH | 1995年 / 10卷 / 02期

关键词：

D O I：

10.1557/JMR.1995.0339

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two commercial Si3N4 powders were mixed with Al2O3 and Y2O3 through coprecipitation of the oxides from solutions of nitrates. The samples were characterized by XPS spectroscopy and electrophoretic mobility determinations on the suspensions. Sedimentation tests indicated that an oxylignin-based polyelectrolyte proved effective in the dispersion of the powders. The adsorption of the deflocculant followed Langmuir type isotherms characterized by values of the standard free energy of adsorption in the range typical of physisorption processes. The results of the different characterizations are discussed point by point, and different localizations of the dispersant in the interfacial region of the different samples are proposed.

引用

页码：339 / 344

页数：6

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