| 摘要 |
PROBLEM TO BE SOLVED: To restrict a particle growth of Cu compound particles and make smaller its average particle size than that of main crystal particles. SOLUTION: After raw material powders of main crystal particles including at least Pb, Mg, Nb and Ti are calcined to synthesize in reaction, Cu compound powders are added to these calcined powders, and these are sintered in the oxygen included atmosphere. Here, it is desirable that an average particle size of the Cu compound particles is 2.0 μm or less, from a viewpoint of enhancements in dielectric characteristics, and further it is desirable that an average particle size of main crystal particles is 1.7 to 3.2 μm. Thus, the Cu compound powders as an assistant in sintering are added to calcined powders of the main crystal particles, whereby the Cu compound powders are uniformly dispersed, and moveover it is possible to prevent gathering of the Cu compound and prevent the Cu compound particles from making large-sized. |
