Patent ID: 8097549

Claim:
A method for manufacturing a cordierite ceramic comprising: forming a cordierite-forming raw material containing α-alumina into a green body, wherein a ratio of D/H of a crystal of an α-alumina raw material powder of the cordierite-forming raw material is 3 or more, wherein D represents an average of an a-axial direction length and a b-axial direction length, and H represents an average length in a c-axial direction, of the crystal of the α-alumina raw material powder, and wherein a degree of orientation, expressed by (I 006 /(I 300 +I 006 ), where I hkl is height of X-ray diffraction intensity of an hkl-face of the α-alumina crystal, by X-ray diffraction measurement of the α-alumina crystal in the green body is 0.10 or more; and heating the formed green body to form the cordierite ceramic.