Patent ID: 9073790
Filing Date: 2015-07-07
Classification: C04B

Abstract:
1. A cordierite sintered body, comprising: a crystal phase comprising: a main crystal phase essentially consisting of cordierite crystal grains; and a sub crystal phase comprising alumina crystal gains, mullite crystal gains and sapphirine crystal gains; and an amorphous phase containing Ca and located at grain boundaries of the cordierite crystal grains and sub crystal grains, wherein a crystal phase proportion of the main crystal phase to the crystal phase is 95% by mass or more and 97.5% by mass or less, a crystal phase proportion of the sub crystal phase to the crystal phase is 2.5% by mass or more and 5% by mass or less, and a content of Ca with respect to the whole amount of the sintered body is 0.4% by mass or more and 0.6% by mass or less in terms of CaO.