Patent ID: 8241449

Claim:
A method for producing a ceramic body comprising: a step of preparing a laminated body including, in sequence, a base layer primarily made of a ceramic material and a glass material, a first constraining layer that is in contact with at least one of main surfaces of the base layer and is primarily made of a ceramic material that is not sintered at a temperature at which the base layer is sintered, a second constraining layer primarily made of a ceramic material and a glass material that are sintered at the temperature at which the base layer is sintered, and a third constraining layer primarily made of a ceramic material that is not sintered at the temperature at which the base layer is sintered; a step of firing the laminated body at the temperature at which the base layer is sintered; and a step of removing the first, second, and third constraining layers from the fired laminated body to provide a ceramic body defined by a sintered base layer; wherein after the firing, adhesion between the base layer and the first constraining layer and adhesion between the second constraining layer and the first constraining layer are different from each other.