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Studying the Effects of Nano Sintering Additives on Microstructure and Electrical Properties of Potassium-Sodium Niobate Piezoceramics

Publish Year: 1397
Type: Journal paper
Language: English
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JR_ACERPT-4-2_002

Index date: 15 October 2019

Studying the Effects of Nano Sintering Additives on Microstructure and Electrical Properties of Potassium-Sodium Niobate Piezoceramics abstract

In this paper, lead free (K0.48,Na0.52)NbO3 (KNN(48-52)) piezoelectric ceramics were made by conventional solid state sintering process. Additives of nano ZnO (n-ZnO), nano CuO (n-CuO) and nano SnO2 (n-SnO2) were used in order to decrease the sintering temperature, as well as modifying the dielectric, piezoelectric and ferroelectric properties. Phase structure and microstructure were analyzed using X-ray diffractometry and scanning electron microscopy techniques. The largest piezoelectric constant of d33= 150 pC/N was obtained for KNN (48-52) with 0.6 mol% n-ZnO at sintering temperature of 1070 °C, which is two times larger than that of pure KNN (48-52) at higher sintering temperatures. Additionally, KNN(48-52) ceramics co-doped with 0.8 mol% n-ZnO, 0.5 mol% n-CuO and 0.8 mol% n-SnO2, showed dielectric and piezoelectric properties of d33= 97 pC/N, tanδ = 0.006 and εr = 172 at sintering temperature of 960 ºC, which are much better than corresponding values for pure KNN at 1110 ºC.

Studying the Effects of Nano Sintering Additives on Microstructure and Electrical Properties of Potassium-Sodium Niobate Piezoceramics Keywords:

Studying the Effects of Nano Sintering Additives on Microstructure and Electrical Properties of Potassium-Sodium Niobate Piezoceramics authors

Raziye Hayati

Ceramic Department, Yasouj University

Reza Bazargan Lari

Materials engineering, Azad University

Mohammad Ali Askari Zamani

Materials engineering, Yasouj University

Zohre Balak

Materials engineering, Azad University