Indian Journal of Pure and Applied Physics

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Composition-Dependent Dielectric and Piezoelectric Properties of Na1-zKzNbO3 Ceramics


Affiliations
1 Department of Sciences (Physics), Quantum University Roorkee - Dehradun Highway, Mandawar, Roorkee, Uttarakhand 247 167, India., India
2 Instrumentation Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
3 Electronics and communication Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
4 Instrumentation and Electronics Engineering,Jadavpur University, Kolkata 700 032, India., India
 

Sodium potassium niobate, Na1-zKzNbO3 , is a ceramic material that exhibits dielectric and piezoelectric properties, which can be tuned by changing the composition of the material. The dielectric properties of Na1-zKzNbO3 ceramics are characterized by a high dielectric constantand low loss, which makes them useful for applications in capacitors, filters, and resonators. Pellets of Na 1-zKzNbO3(0.120 ≤z ≤0.210) were prepared by the solid-state reaction technique. The structural and morphological study was carried out on the prepared compositions at room temperature (RT). A Piezoelectric indirect constant (d33 *) was obtained for the prepared compositions. Additionally, dielectric measurements were performed at frequencies 10-1000 kHz, from ambient temperature to 500 ° C. For the prepared compositions with z = 0.175, a break in the XRD peak shifting patterns was observed, and the average grain size was calculated at 2.044 ± 0.3 µm. Also, the maximum indirect piezoelectric constant (d33 *) was observed for z = 0.175 among the prepared compositions. For the prepared compositions, compositions with z = 0.140 showed the highest dielectric constant (peak value 1486, 385 ° C). Among the prepared samples, dielectric constant (ε), loss tangent (tan δ) and electric conductivity (σ) were found to be minimum for the composition with z = 0.175 at all the measuredfrequencies. Anomalous dielectric, piezoelectric and structural properties are evident for the samples with z = 0.175 among the prepared samples. Overall, the composition-dependent dielectric and piezoelectric properties of Na1-zKzNbO3 ceramics make them promising materials for use in various electronic and sensing applications where high-performance dielectric and piezoelectric materials are required.

Keywords

Ceramics, Dielectric Constant, Electric Conductivity, Grain Size, SEM, Ferroelectrics.
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  • Composition-Dependent Dielectric and Piezoelectric Properties of Na1-zKzNbO3 Ceramics

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Authors

Surendra Singh
Department of Sciences (Physics), Quantum University Roorkee - Dehradun Highway, Mandawar, Roorkee, Uttarakhand 247 167, India., India
Don Biswas
Instrumentation Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
A S Bahuguna
Electronics and communication Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
Prashant Thapliyal
Instrumentation Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
Vishal Rohilla
Instrumentation Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
G S Kathait
Instrumentation Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
N S Panwar
Instrumentation Engineering, H.N.B. Garhwal University, Srinagar Garhwal 246 174, India., India
Prolay Sharma
Instrumentation and Electronics Engineering,Jadavpur University, Kolkata 700 032, India., India

Abstract


Sodium potassium niobate, Na1-zKzNbO3 , is a ceramic material that exhibits dielectric and piezoelectric properties, which can be tuned by changing the composition of the material. The dielectric properties of Na1-zKzNbO3 ceramics are characterized by a high dielectric constantand low loss, which makes them useful for applications in capacitors, filters, and resonators. Pellets of Na 1-zKzNbO3(0.120 ≤z ≤0.210) were prepared by the solid-state reaction technique. The structural and morphological study was carried out on the prepared compositions at room temperature (RT). A Piezoelectric indirect constant (d33 *) was obtained for the prepared compositions. Additionally, dielectric measurements were performed at frequencies 10-1000 kHz, from ambient temperature to 500 ° C. For the prepared compositions with z = 0.175, a break in the XRD peak shifting patterns was observed, and the average grain size was calculated at 2.044 ± 0.3 µm. Also, the maximum indirect piezoelectric constant (d33 *) was observed for z = 0.175 among the prepared compositions. For the prepared compositions, compositions with z = 0.140 showed the highest dielectric constant (peak value 1486, 385 ° C). Among the prepared samples, dielectric constant (ε), loss tangent (tan δ) and electric conductivity (σ) were found to be minimum for the composition with z = 0.175 at all the measuredfrequencies. Anomalous dielectric, piezoelectric and structural properties are evident for the samples with z = 0.175 among the prepared samples. Overall, the composition-dependent dielectric and piezoelectric properties of Na1-zKzNbO3 ceramics make them promising materials for use in various electronic and sensing applications where high-performance dielectric and piezoelectric materials are required.

Keywords


Ceramics, Dielectric Constant, Electric Conductivity, Grain Size, SEM, Ferroelectrics.

References