“…The liquid phase method has such features that the composition of powder can be made uniform with ease and that the particle diameters can be equalized without much difficulty, but a comparatively higher cost is required for obtaining the raw materials. On the other hand, the conventional solid phase method involves such a demerit that it is difficult to obtain uniform ceramics because the particle diameter of powder is large, and moreover, uniform mixing is difficult, but has such [3][4][5][6][7][8][9][10][11][12][13][14][15]. Yagumo-NaKa-machi.…”