Abstract
The effects of additive sintering aids on the microstructures and microwave dielectric properties of 0.8(Mg0.95Zn0.05)TiO3-0.2Ca0.61Nd0.26TiO3 ceramics were investigated. B2O3 was selected as a liquid phase sintering aid to lower the sintering temperature of 0.8(Mg0.95Zn0.05)TiO3-0.2Ca0.61Nd0.26TiO3 ceramics. With added B2O3, the densification temperature of 0.8(Mg0.95Zn0.05)TiO3-0.2Ca0.61Nd0.26TiO3 can be effectively reduced from 1350 °C to 1125-1250 °C. Low-level doping of B2O3 (0.5-4 wt.%) significantly improves the density and dielectric properties of 0.8(Mg0.95Zn0.05)TiO3-0.2Ca0.61Nd0.26TiO3 ceramics. The quality factor Q × f was strongly dependent upon the amount of additives. Q × f values of 21200 and 54900 GHz could be obtained at 1125-1250 °C with 0.5 to 4 wt.% B2O3 added, respectively. Over all ranges of addition, the relative dielectric constants differed significantly and ranged from 24.1 to 26.6. The temperature coefficient varied from 2.9 to 10.03 ppm/°C.
Original language | English |
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Pages (from-to) | 675-679 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 460 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2008 Jul 28 |
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry