Effect of Small Amount BaTiO3 on Properties of K0.02Na0.98NbO3 Ceramics with Various Sintering Temperature Prepared by Molten Salt Method

Chompoonuch Warangkanagool

doi:10.4028/www.scientific.net/KEM.718.129

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 718Effect of Small Amount BaTiO3 on Properties of...

Effect of Small Amount BaTiO₃ on Properties of K_0.02Na_0.98NbO₃ Ceramics with Various Sintering Temperature Prepared by Molten Salt Method

Abstract:

In the research, the properties of potassium sodium niobate – barium titanate [(1-x)K_0.02Na_0.98NbO₃–(x)BaTiO₃: (1-x)KNN–(x)BT] ceramics prepared by molten salt method with various molecular weight of BT or x are 0 and 0.05 were investigated. The calcined powders of pure K_0.02Na_0.98NbO₃ and (0.95) K_0.02Na_0.98NbO₃-(0.05) BaTiO₃ were pressed and sintered at 1250 – 1325 °C and 1225 – 1300 °C for 2h, respectively. It was found that, the samples showed phase structure changing from monoclinic to orthorhombic with small amount BaTiO₃ addition. The densification of K_0.02Na_0.98NbO₃ ceramics and dielectric properties were improved with the addition of BaTiO₃. The (0.95)K_0.02Na_0.98NbO₃–(0.05)BaTiO₃ ceramics sintered at 1250 °C showed maximum density and dielectric constant (∼8035), which was even comparable with that of K_0.02Na_0.98NbO₃ ceramics sintered at 1225 – 1300 °C.

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Key Engineering Materials (Volume 718)

Pages:

129-132

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.718.129

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Online since:

November 2016

Authors:

Chompoonuch Warangkanagool*

Keywords:

(1-x)K_0.02Na_0.98NbO₃-(x)BaTiO₃ Ceramics, Density, Dielectric Properties, Molten Salt Method, Phase Structure

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