| 摘要 |
PROBLEM TO BE SOLVED: To provide a method high in versalitily and capable of easily and precisely controlling the calcining shrinkage even in multi-layered ceramic board without causing any shape defect or the like in calcining body. SOLUTION: The relation between powder B for obtaining a correlation, and powder A used for calcining a calcined body satisfy following conditions. The condition: they have an analogous composition each other, the condition: sum of max common content of common component is >=90 mol.%, the condition: each of the powders A and B has <=1 μm Rs, the condition: Rs value of the powder A is in the range within ±30% of that of the powder B, the condition: averaged agglomeration rate of both powders is in a range of 2-10 and also averaged agglomeration rate of powder A is in a 1/2-2 times that of powder B. By using the powders A and B satisfying the conditions, the heat treatment condition of the powder A is obtained from a multiple regression curve brought from the correlation which is obtained from the powder B. |
