抄録
There has been but little investigation so far made on the rheological behavior of the viscous fluid-solid powder system. This system considerably concerns the field of the electrode technology, the basic refractory engineering and some rubber industry in recent years.
The creep characteristics of the pitch-magnesia powder system are observed in this paper, using the creep tester illustrated in Fig 1. The permanent viscosity coefiicient, the retarded elastic com-pliance and the distribution function of retardation time are herein revealed, using the test system of the pitch-magnesia powder system containing the fluid ranging 21.9%-73.7%.
When the higher concentration of the solid material is employed, the peak point, in which
the distribution function of the retardation time show it's maximum value, is located in the higher value of the retardation time. The maximum value itself, however, is not affected by the concen-tration of the solid matter.
The distribution function of the retardation time is affected enormously by the value of ηi and its correlation can be formulated as follows, where, K' stands for the numerical constant, t for the test time, and T for the degree of the absolute temperature. Some additional considerations have been made on the correlation between the per-manent viscosity, the reciprocal equilibrium compliance and the concentration of the solid materials.
