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Microwave and conventional sintering and grain growth behavior of nano-Nb doped BaTiO3 prepared from microwave hydrothermal powders

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Abstract

Microwave-assisted hydrothermal synthesis of nano-Nb doped BaTiO3 was performed at 150°C for 2 hours, using C16H36O4Ti, Ba(OH)2 · 8H2O, NbCl5 and NaOH as starting chemicals. The resulting powder deposited on to Al2O3 substrates with print screen method and were sintered by Microwave Sintering (MS) of 2.45 GHz at 950°C for 20 min and Conventional Sintering (CS) at 950°C for 90 min in the air atmosphere. It is observed that the grain growth can be suppressed by 2.45 GHz microwave heating process. The grains size distribution of sample sintered for 20 min with microwave heating process was rather uniform with lower grain size and higher surface area. Microstructure, surface morphology and grain size of the thick films were studied by Field-Emission Scanning Electron Microscopy (FE-SEM), Atomic Force Microscopy (AFM) and the surface area analysis with the Brunauer—Emmett—Teller (BET) method and the Barrett—Joyner—Halenda (BJH) method used for the pore size distribution.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran

    A. Khanfekr, R. Naghizadeh & M. Tamizifar

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  1. A. Khanfekr
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  2. R. Naghizadeh
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  3. M. Tamizifar
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Correspondence to A. Khanfekr.

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Khanfekr, A., Naghizadeh, R. & Tamizifar, M. Microwave and conventional sintering and grain growth behavior of nano-Nb doped BaTiO3 prepared from microwave hydrothermal powders. Surf. Engin. Appl.Electrochem. 51, 305–312 (2015). https://doi.org/10.3103/S1068375515040080

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  • DOI: https://doi.org/10.3103/S1068375515040080

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