Physical and Mechanical Properties of Bi0.5(Na0.81K0.19)0.5TiO3 Ceramic Modified by KNbO3

Suchittra Inthong; Chatchai Kruae-In; Wuttikrai Thanomsiang; Suppanat Kosolwattana; Denis Russell Sweatman; Sukum Eitssayeam; Tawee Tunkasiri

doi:10.4028/www.scientific.net/KEM.805.71

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 805Physical and Mechanical Properties of...

Physical and Mechanical Properties of Bi₀_.5(Na₀_.81K₀_.19)₀_.5TiO₃Ceramic Modified by KNbO₃

Abstract:

This research reports the physical and mechanical properties of (1-x) Bi_0.5(Na_0.81K_0.19)_0.5TiO₃-xKNbO₃ (x=0.00-0.06) ceramics. The Modified Bi₀_.5(Na₀_.81K₀_.19)_0.5TiO₃ ceramics were synthesized by solid state reaction technique. The mixed oxides powders were calcined at 850 °C, 4 h and sintered at 1120 °C, 2 h to form pure phase perovskite and the optimum bulk density, respectively. The phase formation of the modified ceramic samples was determined by X-ray diffraction technique. All of the modified Bi₀_.5(Na₀_.81K₀_.19)_0.5TiO₃ ceramics exhibited a single perovskite phase. The bulk densities of the modified ceramic samples were 5.41±0.27-5.75±0.28 g/cm³ using the Archimedes’ method. The microstructure was revealed by the scanning electron microscope. The rectangular-like shape was found of all studied ceramics which had the grain size between 1.31±0.02-1.56±0.03 mm. The mechanical properties were studied by both Vickers and Knoop microhardness tester. The results are discussed in term of the relation among hardness properties, Young’s modulus, and fracture toughness.

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Periodical:

Key Engineering Materials (Volume 805)

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71-75

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.805.71

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Online since:

June 2019

Authors:

Suchittra Inthong, Chatchai Kruae-In, Wuttikrai Thanomsiang, Suppanat Kosolwattana, Denis Russell Sweatman, Sukum Eitssayeam, Tawee Tunkasiri*

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Microhardness, Microstructure, Young’s Modulus

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