Preparation and Properties of Sr2NaNb5O15 Lead-Free Piezoelectric Ceramics by Sol-Gel Method

Tian Hang Zhang; Jin Qiu Zhao; Yang Ai Liu; Zhao Hui Huang; Ming Hao Fang

doi:10.4028/www.scientific.net/KEM.544.96

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 544Preparation and Properties of Sr2NaNb5O15...

Preparation and Properties of Sr₂NaNb₅O₁₅ Lead-Free Piezoelectric Ceramics by Sol-Gel Method

Abstract:

Sr₂NaNb₅O₁₅ ceramic powders have been synthesized by sol-gel method, ceramics were sintered via a pressureless sintering method. The effect of calcining temperature on the phase composition and microstructure of ceramic powders were investigated by TG-DSC, XRD and SEM analyses. The influence of sintering temperature on density, microstructure and properties of the ceramics were systematically analyzed. The results showed that the optimal calcining temperature was 1300°C, the average size of ceramic powders was about 3μm. When the sintering temperature was 1300°C, the ceramics showed optimized densiﬁcation and electrical properties(ρ=4.663 g/cm³, d₃₃=45 pC/N, εr=1126, tan=0.027, Ec=17.91 kV/cm, Pr=6.72 μC/cm², Ps=9.45 μC/cm²)

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Key Engineering Materials (Volume 544)

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96-100

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.544.96

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Online since:

March 2013

Authors:

Tian Hang Zhang, Jin Qiu Zhao, Yang Ai Liu, Zhao Hui Huang, Ming Hao Fang

Keywords:

Lead-Free Piezoelectric Ceramics, Microstructure, Sol-Gel Method, Sr₂NaNb₅O₁₅, Tungsten Bronze Structure

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