Iranian Journal of Ceramic Science & Engineering
Volume 12, Issue 4 (winter 2024)
2024, 12(4): 71-95 |
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shayanzadeh moghaddam T, Hayati R, setoudeh N, mohassel A. Assessing the dielectric and ferroelectric properties of barium titanate produced from barite concentrate and comparing with barium titanate manufactured using commercial raw materials. Iranian Journal of Ceramic Science & Engineering 2024; 12 (4) :71-95
URL: http://ijcse.ir/article-1-964-en.html
URL: http://ijcse.ir/article-1-964-en.html
1- Yasouj University
2- Yasouj University ,r.hayati@yu.ac.ir
3- دانشگاه یاسوج
2- Yasouj University ,
3- دانشگاه یاسوج
Abstract: (697 Views)
Barium titanate powder was synthesized using the solid-state method with raw materials of barium carbonate derived from barite concentrate (barium sulfate) and titanium dioxide (rutile). Simultaneous thermal analysis (STA) was performed on the mixture after milling barium carbonate synthesized from barite concentrate and titanium dioxide. The related graphs showed that the phase formation temperature for barium titanate began at around 650°C, which was consistent with the results of X-ray diffraction (XRD) analysis. Based on the XRD results, the main indicators of the barium titanate phase, along with minor indicators of phases such as (Ba2TiO4, Ca4Ba2Si6O18), were observed in the sample milled for five hours after heating at 1150°C for four hours. The optimal conditions for the sintering of barium titanate were determined to be 1250°C for 2 hours. The bulk density and dielectric constant of barium titanate synthesized from barite concentrate after sintering were approximately 2.322 g/cm³ and 560, respectively. The effect of using barium carbonate precursor synthesized from barite concentrate, the barium sulfate sample from the Tehran-Iran pharmaceutical company (Barex), and the commercial barium carbonate sample (from Merck) on the density and electrical properties of the barium titanate product was examined in this study. Based on the conducted investigations, the percentage of purity, the type of impurities in the raw materials, and the type of barium carbonate precursor have a significant impact on the microstructure and final properties of the barium titanate perovskite compound
Keywords: Mechanical milling, Barite, Barium carbonate, Perovskite, Barium titanate, Dielectric properties
Type of Study: Research |
Subject:
Electrical, Optical and Magnetic Ceramics
Received: 2024/07/26 | Accepted: 2024/10/12
Received: 2024/07/26 | Accepted: 2024/10/12
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