Enhanced photostrictive properties in ternary (1-x)(0.7BiFe1-yMnyO3-0.3BaTiO3)-xKTaO3 ceramics. Issue 4 (15th February 2023)

• Record Type: Journal Article
• Authors: Ren, Z.H.; Hu, J.X.; Shi, L.N.; Jin, R.H.; Jain, Aditya; Chen, F.G.; Wang, Y.G.
• Is Part Of: Ceramics international. Volume 49:Issue 4(2023)
• Page Start: 6270
• Page End: 6279
• Publication Date: 2023-02-15
• Subjects: Photostriction -- Light absorption -- Ferroelectrics -- Lead-free ceramics; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.10.236
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A novel ternary compound (1- x )(0.7BiFe1- y Mn y O3 -0.3BaTiO3 )- x KTaO3 (BFMBT- x KT) is fabricated by solid-state synthesis technique. A systematic investigation of the crystal symmetry, ferroelectric properties, light absorption, and photostrictive properties was carried out with various Mn and KTaO3 doping content. The phase transition behavior induced by the addition of KTaO3 is investigated using X-ray diffraction and Rietveld refinement. The addition of KTaO3 leads to the appearance of the tetragonal phase and the coexistence of pseudo-cubic and tetragonal phases. Furthermore, a high fraction of the tetragonal phase is obtained due to the increased KTaO3 content. The solid solution BFMBT-0.02 KT exhibits strong ferroelectricity ( P r ≈ 42 μC/cm 2 ) as well as a narrow bandgap ( E g ≈ 1.91 eV). Moreover, the largest photostriction of 1.68 × 10 −3 has been achieved in BFMBT-0.02 KT under 405 nm laser irradiation. These improvements are strongly associated with the contribution of KTaO3 -induced phase transition in ceramics. The power-dependent Raman spectroscopy reveals a redshift of phonon modes associated with B–O bond vibrations, indicating microscopic lattice expansion under illumination. As a result, the ternary BFMBT- x KT solid solutions with excellent photostriction will be a promising candidate for wireless optomechanical applications.