磁场中浆料粘度与内部结构的关系研究

When an external magnetic field is applied on the suspension composed of ferromagnetic (FM) Ni and nonmagnetic (NM) ZrO2 particles, the viscosity of the suspension increases drastically. In this paper, the relation of viscosity and inner structure of suspension was investigated by using magnetic coils, rotational viscometer and optical microscopy. The results show that the viscosity varies with the field strength and Ni content because of the formation of chain-like clusters in suspension. As the field increases, Ni clusters become lager, which hinders the free move of particles, so the viscosity increases. Similarly, Ni clusters in the suspension increase with Ni content, and hence the viscosity increases.