Articles
  • Structural investigation and improvement of microwave dielectric properties in Ca1-xBaxTiO3, low loss ceramics

  • Sarir Uddina,†, Abid Zamanb,†,*, Imtiaz Rasoolc, Sadiq Akbarc, Muhammad Kamranc, Nasir Mehboobb, Asad Alib, Abid Ahmadb, Muhammad Farooq Nasirb and Zafar Iqbalb 

  • aDepartment of Physics, Government College Hayatabad, Peshawar 25000, Pakistan
    bDepartment of Physics, Riphah International University, Islamabad 44000, Pakistan
    cDepartment of Electronics, University of Peshawar, 25120, Pakistan

Abstract

The effects of Ba substitution on the phase analysis, microstructure and microwave dielectric properties of Ca1-xBaxTiO3 ceramics were prepared through conventional solid state reaction route. The X-ray diffraction analysis of the samples showed that the specimens Ca1-xBaxTiO3 presented single phase compound with orthorhombic structure in the range of x=0.0 to 0.7 when sintered at 1300oC for 3hrs in air. From the morphological point of view, it consists of round and rod shaped grains with porous microstructure. The substitution of Ba2+ ions over Ca2+, the microwave dielectric constant (εr) diminishes from 145 to 52 whereas the quality factor (Qxf) will increases from 8105 to 24305 GHz and temperature coefficient of resonant frequency decreases from 705 to 80 ppm/oC (at 3 GHz).


Keywords: CaTiO3, Solid State Reaction Route, Crystal structure, Microstructure, Dielectric Properties

This Article

  • 2020; 21(6): 745-750

    Published on Dec 31, 2020

  • 10.36410/jcpr.2020.21.6.745
  • Received on Sep 11, 2020
  • Revised on Oct 30, 2020
  • Accepted on Nov 11, 2020

Correspondence to

  • Abid Zaman

  • Department of Physics, Riphah International University, Islamabad 44000, Pakistan
    Tel : + 00923348257783

  • E-mail: zaman.abid87@gmail.com