Structures and Electrical Properties of Textured Ca_0.85(LiCe)_0.075Bi₄Ti₄O₁₅ Ceramics Prepared by the Reactive Templated Grain Growth

Abstract

Textured Ca_0.85(LiCe)_0.075Bi₄Ti₄O₁₅ ceramics were prepared by reactive templated grain growth method using Bi₄Ti₃O₁₂ templates. The highly oriented Ca_0.85(LiCe)_0.075Bi₄Ti₄O₁₅ ceramics (f = 98%) were formed in situ topotaxially on the Bi₄Ti₃O₁₂ templates, which exhibit high piezoelectric properties (d₃₃ = 33 pC/N) compared with the randomly ceramics in Aurivillius-type bismuth layer structured ferroelectrics. The d₃₃ value of textured ceramics has excellent temperature stability when the temperature is below the 500°C. High Tc and DC resistance also illustrate that the textured Ca_0.85(LiCe)_0.075BiTi₄O₁₅ ceramics can be a promising high-temperature piezoelectric application.

Keywords:

• Textured ceramics
• bismuth layer-structure
• tape-casting technology
• piezoelectricity
• topo-chemical reaction