Microwave dielectric properties of (1-x)Ca0.61La0.26TiO3-xLa(Mg0.5Ti0.5)O3 ceramics prepared by microwave sintering [(1-x)Ca0.61La0.26TiO3-xLa(Mg0.5Ti0.5)O3陶瓷的微波烧结及微波介电性能研究]

作者：Liu J.; Liang B.^*; Fang C.; He W.; Chen W.; Ouyang S.; Zhang J.; Ai Y.

来源：Journal of Functional Materials, 2021, 52(1): 01192-01196.

DOI：10.3969/j.issn.1001-9731.2021.01.028

• (1-x)CLT-xLMT ceramics
• Lattice constant
• Microwave dielectric properties
• Microwave sintering
• Resonance frequency temperature coefficient

(1-x)Ca0.61La0.26TiO3-xLa(Mg0.5Ti0.5)O3[x=0.35-0.60, (1-x)CLT-xLMT] microwave dielectric ceramics were prepared by microwave sintering. The effects of sintering process and composition ratio on its phase composition, microstructure and microwave dielectric properties were studied. The results show that the microwave sintering temperature of (1-x)CLT-xLMT ceramics was 100 ℃ lower than that of conventional sintering temperature, and the sintering time was shortened by 5/6. (1-x)CLT-xLMT ceramics have formed perovskite structures. With the increase of x, the dielectric constant ε showed a downward trend, the Qf value first increased to 28038 GHz and then decreased to 6940 GHz, and the temperature coefficient of resonance frequency τf kept decreasing. The excellent comprehensive microwave dielectric properties of ε=47, Qf=19 257 GHz and τf=7.9×10-6/℃ could be obtained when x=0.40, 1575 ℃ and 30 min. It could be used in the field of mobile communications.

• 单位
  南昌航空大学