Structural and electrical properties of 0.98(KO\(_{0.5}\)NaO\(_{0.5}\)NbOO\(_{3}\))-0.02(BiO\(_{0.5}\)NaO\(_{0.5}\)TiOO\(_{3}\)) ceramics


  • Swayam Aryam BEHERA Department of Chemistry, Siksha O Anusandhan University, Bhubaneswar-751030, India
  • Sugato HAJRA Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology, Daegu-42988, Republic of Korea
  • Swati PANDA Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology, Daegu-42988, Republic of Korea
  • Ali AMANAT Department of New Materials and Nanotechnology, National University of Science and Technology MISiS, Moscow, Russia
  • P. G. R. ACHARY Department of Chemistry, Siksha O Anusandhan University, Bhubaneswar-751030, India



Lead-Free, Piezoelectric, Ferroelectric, Potassium sodium niobate, Bismuth sodium titanate


In the present communication, lead-free ceramics having composition 0.98(K0.5Na0.5NbO3)-0.02(Bi0.5Na0.5TiO3) were synthesized by a high-temperature solid-state reaction route. The Rietveld refinement for the 0.98KNN-0.02BNT reveals an MPB with phase fraction Amm2 (87.76 %) and Pm-3m (12.27%). The SEM study predicted a mean diameter of 0.98KNN-0.02BNT grains as 0.52µm±0.19. The 0.98KNN-0.02BNTceramic displayed a typical hysteresis loop with a remnant polarisation(Pr) of 7.0 μC/cm2, saturation polarization (Ps) of 16 μC/cm2, and a coercive field (Ec) of 26 kV/mm. The electrical, Raman spectra, dielectric, and hysteresis loop study supported a morphotropic phase boundary. The synthesized KNN-BNT lead-free material can be an excellent material for designing new devices like ultrasonic transducers and piezo-actuators.


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How to Cite

S. A. . BEHERA, S. HAJRA, S. . PANDA, A. AMANAT, and P. G. R. ACHARY, “Structural and electrical properties of 0.98(KO\(_{0.5}\)NaO\(_{0.5}\)NbOO\(_{3}\))-0.02(BiO\(_{0.5}\)NaO\(_{0.5}\)TiOO\(_{3}\)) ceramics”, J Met Mater Miner, vol. 33, no. 4, p. 1894, Dec. 2023.



Original Research Articles