| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a BaO-Nd<SB>2</SB>O<SB>3</SB>-TiO<SB>2</SB>-based dielectric ceramic and a resonator attaining high quality factor Q value and a stable temperature characteristic (τf) nearly zero while keeping relative dielectric constant of ≥60. <P>SOLUTION: The dielectric ceramic contains Ba, Nd and Ti and when the composition is expressed by αBaO_βNd<SB>2</SB>O<SB>3</SB>_γTiO<SB>2</SB>, the molar ratio of each of α, β, and γ satisfies 13.0≤α≤18.5, 10.5≤β≤18.0 and 66.0≤γ≤73.5, and the dielectric ceramic contains ≥1.1 mass% and ≤5 mass% aluminum expressed in term of oxide, ≤0.5 mass% (excluding 0 mass%) manganese expressed in terms of oxide. The dielectric resonator uses the dielectric ceramic as a dielectric material. <P>COPYRIGHT: (C)2011,JPO&INPIT |
