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- Title
Sintering characteristics and microwave dielectric properties of 0.5(Ca0.7Nd0.2)TiO<sub>3</sub>–0.5(Li0.5Nd0.5)TiO<sub>3</sub> ceramics with La<sub>2</sub>O<sub>3</sub>–B<sub>2</sub>O<sub>3</sub>–CaO–P<sub>2</sub>O<sub>5</sub> additive
- Authors
Shi, Jiawen; Chen, Xingyu; Zhang, Weijun; Mao, Haijun; Wang, Fenglin; Wei, Jiatong
- Abstract
In this paper, the effects of glass-ceramics sintering aid, La2O3–B2O3–CaO–P2O5 (LBCP), on the sinterability, microstructure, and microwave dielectric properties of 0.5(Ca 0. 7 Nd 0. 2) TiO3–0.5(Li 0. 5 Nd 0. 5) TiO3 (CNT–LNT) ceramic have been investigated. The results indicated that LBCP glass-ceramics has good wettability to CNT–LNT (contact angle at 980 ∘ C is 31.9 ∘ ), and it can be used as an effective sintering aid to reduce the sintering temperature of CNT–LNT ceramic from 1300 ∘ C to 980 ∘ C. LBCP glass-ceramics did not change the main crystal phase (perovskite structure) of the sample, but a small amount of LaBO3 and LaPO4 phases was precipitated. Since the LaBO3 and LaPO4 phases are low-loss phases, it is believed that the crystal phases can improve the dielectric properties of the sample, especially the dielectric loss. The samples with 10 wt.% of glass additive sintered for 4 h at 980 ∘ C exhibit the optimized properties: a high dielectric constant of 80.8 and a Q × f value of 2031 GHz. The high r and Q × f value, coupled with a relatively low sintering temperature, suggest that the optimized compositions have the potential to be used in microwave low-temperature co-fired ceramics applications.
- Subjects
DIELECTRIC properties; CERAMICS; MICROWAVE sintering; DIELECTRIC loss; PERMITTIVITY; GLASS-ceramics; MICROWAVE heating
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2021, Vol 35, Issue 31, p1
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979221503215