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    • Keywords

       

      Solid-state reaction; silicates; dielectric ceramics; microwave; quality factor.

    • Abstract

       

      Dielectric ceramics have gained wide attention owing to their applicability in a broad range of domains including a microwave communication system. Silicates are considered as the prospective substrate materials for microwave circuitsdue to their properties complementing with the requisites of a microwave substrate. Lightweight lithium-based silicate ceramic namely lithium magnesium silicate (Li$_2$MgSiO$_4$, LMS) was prepared by a solid-state reaction method. Zinc oxide (ZnO) was used as an additive to LMS in different weight percentages (0.5, 1.0, 1.5 and 2.0) and LMS-ZnO ceramics were also prepared. The microwave dielectric properties of pure LMS and ZnO-added LMS were measured and the influence of ZnO on LMS was investigated. A dielectric resonance technique was utilized to study the dielectric properties of ceramic samples at 12 GHz. A comparatively higher quality factor of 24,000 GHz was attained by the LMS-ZnO (2wt%) system with a relative density of 90.2% and <10 dielectric constant of 5.76 making it suitable for substrate applications.

    • Author Affiliations

       

      ALEENA ROSE1 B MASIN2 K ASHOK2 H SREEMOOLANADHAN2 T VIJAYAKUMAR1

      1. Futuristic Materials Research Centre for Planetary Exploration, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram 603203, India
      2. Advanced Materials and Ceramic Division, Vikram Sarabhai Space Center, Thiruvananthapuram 695022, India
    • Dates

       
  • Bulletin of Materials Science | News

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