Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

An Investigation on Microwave Sintering and Its Effects on Crystal Structure, Microstructure and Microwave Dielectric Properties of Li2TiO3 Ceramic

Document Type : Original Reaearch Article

Authors
Somaye Ghaffari 1
Touradj Ebadzadeh 1
Masoud Alizadeh 2
Keivan Asadian 3
1 Department of Ceramics, Materials and Energy Research Center, Karaj, Alborz, Iran.
2 Department of Ceramics, Materials and Energy Research Center, Karaj, Iran.
3 Department of Semiconductors, Materials and Energy Research Center, Karaj, Iran.
10.30501/jamt.2019.94173
Abstract
In this research, Li2TiO3 ceramic was sintered via heating procedures of conventional and microwave sintering. The maximum density of 3.08 g/cm3 at 1200˚C with 3 h holding time and 3.12 g/cm3 at 1300˚C without any holding time was achieved through conventional and microwave sintering, respectively. The thermal behavior was investigated using DTA-TG, phase analysis was performed by XRD technique, and microstructures were observed by FE-SEM. Also microwave measurements were performed using Network Analyser. XRD investigations showed a higher intensity of (002) peak located at 2θ=18.46˚ in microwave sintered part attributed to higher degree of cation ordering and superlattice formation. Microstructural investigations by SEM revealed the finer microstructures of microwave rather than conventionally sintered parts. The maximum microwave characteristics were measured εr= 20.29 and Q×f = 26191 GHz for parts sintered in a conventional furnace at 1200˚C and εr= 20.86 and Q×f = 25610 GHz for parts sintered in microwave at 1300˚C.
Keywords
Microwave sintering
Li2TiO3
microwave dielectric properties
microstructure
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  • Receive Date 26 December 2017
  • Revise Date 31 December 2018
  • Accept Date 23 May 2019