La(Mg1/2Ti1/2)O3-based ceramics are prepared with a conventional solid-state route. With 50 mol % CaTiO3 addition, 0.5La(Mg1/2Ti1/2)O3-0.5CaTiO 3 ceramics with 0.25wt% B2O3 εr, value of ∼42.92-43.38, Q × f values of ∼24000 (at 7 GHz) and τf values of ∼-8.9 ppm/°C. However, the sintering temperature remains above 1400°C. Doping with B2O 3 (up to 1 wt%) can effectively promote the densification and improve the dielectric properties of 0.5La(Mg1/2Ti1/2)O 3-0.5CaTiO1/2-ceramics. The effects of a B 2O3 additive on the microstructures, phase formation and microwave dielectric properties of La(Mg1/2Ti1/2)O 3-CaTiO3 ceramics system are investigated. The Q × f value of B2O3-doped 0.5La(Mg1/2Ti 1/2)O3-0.5CaTiO3 ceramics can be improved to 28000 (at 8 GHz) at 1400°C due to the liquid-phase effect. The microwave dielectric properties are found to strongly correlate with the sintering temperature as well as the amount of B2O3 added.
|Number of pages||3|
|Journal||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|Issue number||9 A|
|Publication status||Published - 2005 Sep 8|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)