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- Title
Zn<sub>0.9</sub>Mg<sub>0.1</sub>Al<sub>2</sub>O<sub>4</sub> 微波导热陶瓷材料的改性研究.
- Authors
高鸣阳; 李元勋; 陈澍; 陆永成; 彭 睿
- Abstract
The Zn0.9Mg0.1Al2O4 + x%TiO2(0≤x≤3) microwave dielectric ceramics with relatively high thermal conductivity were prepared by the solid-phase reaction,and the effect of TiO2 on the crystal phase, micromorphology, microwave dielectric properties, and thermal conductivity of the Zn0.9Mg0.1Al2O4 ceramics were studied. With the increase in TiO2 doping, a small amount of non-stoichiometric compounds appeared in the composite Zn0.9Mg0.1Al2O4 ceramics. Meanwhile, TiO2 doping promoted the growth of crystal grains, which may due to the doping of TiO2 promoted the sintering reactions, and also suppressed the micro lattice disorder and macro segregation, so that the dielectric and thermal conductivity of the Zn0.9Mg0.1Al2O4 ceramic can be improved. The results showed that the Zn0.9Mg0.1Al2O4 + 2% TiO2 ceramics exhibited the best performances as sintered at 1500°C with the dielectric constant εr of 8.57, Q X f of 180 861 GHz, and thermal conductivity of 19.67 W/(m • K).
- Subjects
THERMAL conductivity; PERMITTIVITY; NONSTOICHIOMETRIC compounds; CRYSTAL growth; MICROWAVE sintering; TITANIUM dioxide; DIELECTRIC properties
- Publication
Piezoelectrics & Acoustooptics, 2021, Vol 43, Issue 2, p260
- ISSN
1004-2474
- Publication type
Article
- DOI
10.11977/j.issn.1004-2474.2021.02.024