Some Considerations on the None-Similar Changes of the Void Spaces Produced by the Thermal Expansion of Refractory Bodies

In our previous paper, the relationship between the thermal expansion and the packing of the particles of refractory bodies were investigated. The conclusions were as follows: (1) In the case of the powder composed of single component, the volume changes of the void spaces produced by the thermal expansion were proportional to the volume changes of the bodies. (2) In the case of the two or more components systems, however, these volume changes were not proportional to those of the bodies. In this paper, many observation about such none-similar changes of void spaces of packed bodies were attempted, using model experiments, and the following formula was decided to relate the actual thermal expansion (εx) and the calculated one (εmx) εx-εmx=S/3v=|ε1-ε2|(f1·f2)n here, n is the experimental constant. The n values decided by many observations are 0.55-1.25.