Tunable dielectric and microstructure properties Zn2SiO4–Mn glass–ceramics for multifunctional applications

The synthesis of Zn 2 SiO 4 doped with Mn 2+ ions ( Mn – Zn – Si ) glass–ceramics‎ sample have been successfully by a sol–gel method. The crystal structure and microstructure of Mn–Zn–Si glass–ceramics were studied by X-ray diffraction ( XRD ) and transmission electron microscopy ( TEM ) techniques. The XRD results of Mn–Zn–Si glass–ceramics samples showed no obvious differences from the willemite structure. The TEM results showed the Mn–Zn–Si glass–ceramics are nanometer sized grains. The dielectric properties of the glass–ceramics samples were measured with frequency at diverse measurement temperature‎. The loss tangent (tan δ) and AC conductivity (σ ac ) properties as the function of frequency have also been analyzed, which meet the requirements of high power and impedance matching, thus making it a promising candidate for applications as electrically tunable microwave devices.