| 摘要 |
PURPOSE: To increase a dielectric constant and a no-load Q value and decrease the absolute value of the temperature coefficient of a resonance frequency by changing the values of (x), (y), (z), and (u) of the composition formula 1-5 of dielectric magnetic composition to be within the range of an additional remark to adjust a dielectric constant. CONSTITUTION: Each power of LiCO3 , La2 O3 , Nd2 O3 , Sm2 O3 , Pr6 O11 , CaCO3 , and TiO2 having high chemical purity is weight so as to have a given mole ratio. They are mixed for twenty hours by adding pure water to them in a bowl mill. Obtained slurry is dried to be put in an alumina-made sheath to to temporarily calcinated at 750-1100 deg.C for 1-5 hours. This slurry is ground and dried again to be added with polyvinyl alcohol of 1wt.% quantity to be passed through a standard sieve of 60-meshes, and is packed into a 10mmϕdie to be pressed by a pressure of 100MPs to be formed into a columnar molded body of 6mm thickness. This body is baked at 1200-1400 deg.C for 1-5 hours in air to obtain a baked body. An end surface is lap-worked to be measured by a dielectric clumn resonator method.
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