Kandulna, Nelson and Ray, Debjyoti and Palui, Souvik and Bhattacharyya, Sharmi (2024) Effect of transition metal ion pairs doping on the dielectric properties of mullite derived by sol-gel route. Bulletin of Materials Science, 47 (1). ISSN 0250-4707

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Abstract

In this study, highly crystallized pure mullite was synthesized using the sol-gel method, and transition metal oxides (TiO2 and MoO3) were prepared and incorporated into the structure of mullite by an intensive solid-state mixing process. The derived precursor powders were compacted into tablets by hydraulic pressing and sintered at 1550 degrees C. X-ray diffraction analysis of the sintered compacts clearly indicated the formation of well-crystallized mullite and no other phases were detected. The microstructural features were investigated by scanning electron microscopy, and the findings revealed that the addition of TiO2 and MoO3 induced the mullite grains to grow anisotropically. The dielectric characteristics of the sintered samples were measured at increasing frequencies of 100 kHz to 1 MHz. The findings revealed that the mullite sample co-doped with TiO2 and MoO3 had the highest dielectric constant of 15.85 and the dielectric loss was 0.93 at 100 kHz.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Sol Gel
Depositing User:	Ms Upasana Sahu
Date Deposited:	02 May 2024 09:36
Last Modified:	02 May 2024 09:36
URI:	http://cgcri.csircentral.net/id/eprint/5696

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