Sinterability, Microstructural Evolution, and Dielectric Performance of Bismuth Sodium Titanate (Bi_0.5Na_0.5TiO₃) Lead-Free Ferroelectric Ceramics

• Autorzy: Takiul Islam , Lee Sanghaw , Hwang Haejin

Identyfikatory

DOI

10.24425/amm.2024.147780

• Języki publikacji: EN

Abstrakty

EN

In this study, lead-free bismuth sodium titanate (BNT; Bi_0.5Na_0.5TiO₃) powder was synthesized using wet precipitation. The sintering behavior and dielectric properties of the BNT ceramics were investigated in terms of the sintering temperature. Titanium isopropoxide, sodium nitrate, and bismuth nitrate were used as starting materials. A titanium peroxo complex (TPC) solution was synthesized using titanium hydroxide, nitric acid, and hydrogen peroxide. A clear Bi-Na-Ti precursor solution was obtained by mixing the TPC, sodium, and bismuth nitrate solutions. The pH of the precursor solution was increased to 9 using NaOH and a white powder was precipitated. A spherical and pyrochlore phase-free BNT powders were obtained by calcining the white precipitate above 600°C for 3 h. Particle size analysis and SEM observations revealed that the BNT powder calcined at 700°C exhibited homogeneous distribution with particle size less than 300 nm. The sinterability of the BNT ceramic prepared through wet precipitation was significantly enhanced compared to that of the BNT powder prepared via the solid-state reaction of sodium carbonate, bismuth oxide, and titanium oxide powders.

Słowa kluczowe

EN

bismuth sodium titanate; lead-free; ferroelectrics; sintering; dielectric constant

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2024
• Tom: Vol. 69, iss. 1
• Strony: 33--38
• Opis fizyczny: Bibliogr. 19 poz., fot., rys.

Twórcy

autor

Takiul Islam

• Inha University, Department of Materials Science and Engineering, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea

• https://orcid.org/0009-0003-3432-779X

autor

Lee Sanghaw

• Inha University, Department of Materials Science and Engineering, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea

• https://orcid.org/0009-0009-8032-1683

autor

Hwang Haejin

• Inha University, Department of Materials Science and Engineering, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea

• https://orcid.org/0000-0002-1174-9485

Bibliografia

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Uwagi

This work was supported by the National Research Foundation of Korea (NRF) grant (NRF-2020M3D1A2102918). This study was supported by an Inha University Research Grant.