| 摘要 |
PROBLEM TO BE SOLVED: To make possible use so high frequency as several handreds MHz-GHz and to bake at low temperature under 1000 deg.C. SOLUTION: Hexagonal crystal which includes more than a kind of alkaline earth metal elements at least as a main composition, more than one of Pb or Cu at least, Fe and O, are used as a main phase. Also hexagonal crystal ferrite which includes more than one kind of alkaline earth metal elements at least, Fe and O, is used as a main phase and includes metal oxide Mx Oy as weight% of O<Mx Oy <=10 as a sub-component (Mx Oy includes more than one kind of V2 O5 , CuO, Bi2 O3 , M0 O3 , WO2 and/or PbO). |
