Heat storage

Abstract

Provided is a heat storage including a container including a first container made of ceramics and a second container made of ceramics, the first container and the second container being combined, and a heat storage material housed inside the container. The first container and the second container are bonded via a bonding member. A volume occupied by pores in the first container, in a first contact region including a surface section in contact with the bonding member, is greater than a volume occupied by pores in regions other than the first contact region. A volume occupied by pores in the second container, in a second contact region including a surface section in contact with the bonding member, is greater than a volume occupied by pores in regions other than the second contact region.

Dependencies are inferred from the claim text.