Influence of Particle Size and Sintering Temperatures on Electrical Properties of 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 Lead Free Ceramics

• Autorzy: Gul Mert , Gurbuz Mevlüt , Gokceyrek Abdi B. , Toktaş Aysegül , Kavas Taner , Dogan Aydın

Identyfikatory

DOI

10.24425/amm.2020.132799

• Języki publikacji: EN

Abstrakty

EN

In this study, lead-free 0.94 Na_0.5 Bi_0.5 TiO₃ -0.06BaTiO₃ (NBT-BT) compositions at morphotropic phase boundary were successfully synthesized by solid-state reaction method. The effects of the particle size for various milling time (12-24-48 hours) and sintering temperatures (1100-1125-1150-1175°C for 2 h) on the electrical properties of the NBT-BT ceramics were evaluated. Experimental results showed that particle size and sintering temperatures significantly affect the electrical properties of NBT-BT ceramics. The particle size of the ceramic powders decreasing while milling time increases to 48 hours. Particle size values for 0, 12, 24 and 48 hours (h) milled powders were measured as nearly 1.5 μm, 1 μm, 700 nm, and 500 nm respectively. The bulk density enhanced with increasing sintering temperature and showed the highest value (5.73 g/cm³) at 1150°C for 48 h milled powder. Similarly, the maximum piezoelectric constant (d₃₃ ) = 105 pC/N, electromechanical coupling coefficient (k_p ) = 25.5% and dielectric constant (K^T) = 575 were measured at 1150°C for 48 h milled powder. However, mechanical quality factor (Q_m ) was reduced from 350 to 175 with decreasing particle size. Similarly, remnant polarization was dropped by decreasing powder particle size from 56 μC/cm² to 45 μC/cm².

Słowa kluczowe

EN

lead-free; NBT-BT; particle size; sintering; electrical properties

• 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: 2020
• Tom: Vol. 65, iss. 2
• Strony: 609--614
• Opis fizyczny: Bibliogr. 29 poz., fot., rys., tab., wzory

Twórcy

autor

Gul Mert

• Afyon Kocatepe University, Department of Materials Science and Engineering, Afyonkarahisar, Turkey
• Nanotech High Tech Ceramics Co., Eskisehir, Turkey

autor

Gurbuz Mevlüt

• Ondokuz Mayis University, Department of Mechanical Engineering, Samsun, Turkey

autor

Gokceyrek Abdi B.

• Eskisehir Technical University, Department of Materials Science and Engineering, Eskisehir, Turkey

autor

Toktaş Aysegül

• Eskisehir Technical University, Department of Materials Science and Engineering, Eskisehir, Turkey

autor

Kavas Taner

• Afyon Kocatepe University, Department of Materials Science and Engineering, Afyonkarahisar, Turkey

autor

Dogan Aydın

• Nanotech High Tech Ceramics Co., Eskisehir, Turkey
• Eskisehir Technical University, Department of Materials Science and Engineering, Eskisehir, Turkey

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Uwagi

EN

1. This work was supported by Science Research Projects of Anadolu University (Projects No:1705F199 and 1605F333) and Foundation of PhD Thesis Support Program in Afyon Kocatepe University in Turkey (Project No:17.FEN.BİL.71). The authors gratefully thank to Nebahat Bıyıklı for experimental supports, and following people for their supports Ali Bıyıklı, Görkem Hatipoğlu, Hakan Güleç, İrem Panta, Ayşe Korkmaz and Enes Düden. Thanks are also to Serhat Tıkız, Hakan Şahin (Afyon Kocatepe University TUAM) and Salih Akyürekli (Suleyman Demirel University) for their help in the SEM and XRD measurements. Special thanks to Assist. Prof. Dr. Metin Özgül for his valuable comments.

PL

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).