| 摘要 |
PURPOSE:To greatly reduce the viscosity of a magnetic fluid where the fine particles of interfacial active agent adsorption ferrite are dispersed in low-vapor- pressure base oil by using a phosphate-based dispersant. CONSTITUTION:Ferrite particles, to which phosphate having monooxyalkylene or dioxyalkylene substituent is adsorbed, are dispersed in tri-phosphate-based low vapor pressure base oil by using phosphate having monooxyalkylene or dioxyalkylene substituent in this magnetic fluid. |
