TY - GEN
T1 - Dielectric Properties of Low Concentration Barium Doped K0.5Na0.5NbO3 Lead Free Ceramics Prepared via Solid State Reaction Method
AU - Mohamed, Julie Juliewatty
AU - Saari, Muhammad Qusyairie
AU - Bahanurddin, Nor Fatin Khairah
AU - Rahman, Mohd Fariz Ab
AU - Jumali, Mohammad Hafizuddin
AU - Yuwono, Akhmad Herman
N1 - Funding Information:
This work was financially supported by Short Term Research Grant Scheme-Matching (STRG-MATCHING) under the grant R/SGJP/A1300/01367A/007/2019/00575.
Publisher Copyright:
© 2022 Trans Tech Publications Ltd, Switzerland.
PY - 2022
Y1 - 2022
N2 - In this work, the effect of low concentration of Barium (Ba) on the density, crystal structure, microstructure and dielectric properties of K0.5Na0.5NbO3 (KNN) lead-free piezoelectric ceramic samples have been systematically studied. The samples were calcined at 850 ˚C for 6 hours and pressed using a hydraulic hand press to produce a green body disc. In this way, the green body disc of KNN was doped with 0.00 to 0.10 mol % of Ba concentration and was placed in an alumina crucible before conventional sintering at 1120 ºC for 2h in air atmosphere. The increasing amount of Ba shifting all the diffraction peaks to a higher angle was measured using X-Ray Diffraction. Doping the Ba also improved the density of the KNN body. The most densified body was identified for x= 0.05 mol% of Ba which is 4.21355 g/cm3 . The microstructure of the surface becomes finer and smaller after Ba doping. This shifting diffraction peaks and densified body is responsible for the enhancement of dielectric properties with the optimum value obtained from the sample doped with x= 0.05 mol%. The results show that relative permittivity (ɛr) was improved by the increment of Ba2+ concentration for 0.05 mol% which is 183.9856 for 1 kHz.
AB - In this work, the effect of low concentration of Barium (Ba) on the density, crystal structure, microstructure and dielectric properties of K0.5Na0.5NbO3 (KNN) lead-free piezoelectric ceramic samples have been systematically studied. The samples were calcined at 850 ˚C for 6 hours and pressed using a hydraulic hand press to produce a green body disc. In this way, the green body disc of KNN was doped with 0.00 to 0.10 mol % of Ba concentration and was placed in an alumina crucible before conventional sintering at 1120 ºC for 2h in air atmosphere. The increasing amount of Ba shifting all the diffraction peaks to a higher angle was measured using X-Ray Diffraction. Doping the Ba also improved the density of the KNN body. The most densified body was identified for x= 0.05 mol% of Ba which is 4.21355 g/cm3 . The microstructure of the surface becomes finer and smaller after Ba doping. This shifting diffraction peaks and densified body is responsible for the enhancement of dielectric properties with the optimum value obtained from the sample doped with x= 0.05 mol%. The results show that relative permittivity (ɛr) was improved by the increment of Ba2+ concentration for 0.05 mol% which is 183.9856 for 1 kHz.
KW - Ba
KW - Doping
KW - Lead-free piezoceramic
KW - potassium sodium niobate
UR - http://www.scopus.com/inward/record.url?scp=85127220808&partnerID=8YFLogxK
U2 - 10.4028/p-0wl9uy
DO - 10.4028/p-0wl9uy
M3 - Conference contribution
AN - SCOPUS:85127220808
SN - 9783035712742
T3 - Key Engineering Materials
SP - 223
EP - 227
BT - Current Materials Research Using X-Rays and Related Techniques III - Selected peer-reviewed full text papers from the 10th International Conference on X-Rays and Related Techniques in Research and Industry, ICXRI 2021
A2 - Md Din, Muhamad Faiz
A2 - Hashim, Fakhroul Ridzuan
A2 - Makmor, Nazrul Fariq
A2 - Abdullah, Norazharuddin Shah
A2 - Wan Ali, Wan Fahmin Faiz
A2 - Rejab, Nik Akmar
A2 - Sulaiman, Muhammad Azwadi
PB - Trans Tech Publications Ltd
T2 - 10th International Conference on X-Rays and Related Techniques in Research and Industry, ICXRI 2021
Y2 - 18 August 2021 through 19 August 2021
ER -