低温における粘土質耐火れんが素地の焼成き裂に関する研究

抄録

Some fractures or cracks of the refractory clay bodies generated in the low firing temperature range were observed, and the relation between the thermal cracks and the packing of the material powders were investigated. The following results were obtained:
(1) The original packing characteristics were changed remarkably by the thermal expansion produced in the bodies during heating procedure, but the effects in the cooling period were not remarkable.
(2) The fractures of the bodies produced in the heating period were also affected by the blending of the component powders. Cracks were generated by poor blending.
(3) However, poor blending produced good packing of the material powders in the heating procedure. Coarse constituents produced also good packing of the powder in the heating period.
(4) When Roseki powder were used as the coarse constituent and clay powder as the fine one, the resultant composition was quite proof against producing the none-similar changes of the void spaces.