Characterization and Piezoelectric Properties of Bismuth Sodium Titanate Prepared by the Hydrothermal Synthesis Method

Abstract:

Bismuth sodium titanate (Na_1/2Bi_1/2)TiO₃ powders were prepared by the hydrothermal route with starting chemicals containing Ti (OC₄H₉)₄, Bi (NO₃)₃5H₂O as Bi and Ti sources at 180°C for 48 h in a PTFE-lined autoclave. XRD result confirms the formation of a pure pervoskite structure for the synthesized powders. SEM observation shows that the powders consist of spherical particles in the range of 0.2~1.0 μm, exhibiting a mean particle size of 0.5 μm. Compared with (Na_1/2Bi_1/2)TiO₃ ceramics made by the conventional solid state reaction method, the specimen made by the hydrothermal synthesis method has superior piezoelectric properties with its piezoelectric constant d₃₃ attaining a relatively high value of 78 pC/N.

• Periodical: Advanced Materials Research (Volume 763)
• Pages: 135-138
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.763.135
• Online since: September 2013
• Authors: Yan Wang, Jin Hui Lin, Hui Li, Miao Deng, Shan Hua Chen
• Keywords: (Na_1/2Bi_1/2)TiO₃, Hydrothermal Method, Piezoelectric Properties, Sintering

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