| 摘要 |
PROBLEM TO BE SOLVED: To obtain a large dielectric constant by forming a ceramic composition consisting of PbO, ZrO2 , MgO and TiO2 and expressed by a specified formula. SOLUTION: Powdery starting materials such as PbO, ZrO2 , MgO and TiO2 are blended in a prescribed ratio, and water is added and the mixture is subjected to wet mixing with a ball mill, etc., and the mixture is dehydrated, dried and calcined at about 1000-1100 deg.C, then the water is added and the mixture is ground and mixed with the ball mill, dehydrated and dried. Then, an org. binder such as PVA is added to the powdery mixture and compacted, and the compact is burned at about 1,200-1,300 deg.C for an order of 2hr and a dielectric ceramic composition for temp. compensation having a composition expressed by the formula xPbZrO3 .(1-x)MgTiO3 (0.15<=x<=0.3) is obtained. |
