The effect of temperature on the shear viscosity are shown in Fig. 6 for the sample with 10% metal powders. The shear viscosity was relatively lower at higher temperature. This is mainly due to the viscosity decrease of base silicone oil by heating. This tem- perature effect(H) can be characterized with Arrhenius type ex ponential model as below[24]. (5) H moeRT where mo is the material constant, Qis the activation energy, R is the universal gas constant(8.314 J mol K n). As shown in Fig. 6, Arrhenius model described well the general tendency of viscosity decrease at high temperature.