INVESTIGATION ON DIELECTRIC AND MAGNETIC PROPERTIES OF DOPED (Eu, Dy, Sb, Co, Tb) BARIUM TITANATE CERAMICS

Abstract

In this study, barium titanate (BaTiO3) ceramic powders which have superior piezoelectric and ferroelectric properties were produced by mixed oxide method. Europium (Eu), Dysprosium (Dy), Antimony (Sb), Cobalt (Co) and Terbium (Tb) elements are used as dopant material in equal mole percent, and doped BaTiO3 ceramic powders were synthesized on nano and micro scale. These powder mixtures were shaped by cold press method and then sintered. SEM, XRD characterizations, and capacitance,and magnetometry measurements were performed. As a result, nano-sized doped and undoped BaTiO3 ceramic powders having semiconductor behavior and ferroelectric properties were obtained at room temperature. In addition, the most suitable dopant material was determined as Sb as a result of the characterization results.

Keywords

• Barium titanate
• ferroelectric
• doping
• nano-ceramics

KATKILANDIRILMIŞ (Eu, Dy, Sb, Co, Tb) BARYUM TİTANAT SERAMİKLERİNİN (BaTiO3) DİELEKTRİK VE MANYETİK ÖZELLİKLERİNİN İNCELENMESİ

Abstract

Bu çalışmada üstün piezoelektrik ve ferroelektrik özellik gösteren Baryum Titanat (BaTiO3) seramik tozları karıştırılmış oksit yöntemi ile üretilmiştir. Daha sonra eşit mol yüzdesinde Evropiyum (Eu), Disporsiyum (Dy), Antimon (Sb), Kobalt (Co) ve Terbiyum (Tb) elementleri katkı malzemesi olarak kullanılmış, katkılı BaTiO3 seramik tozları nano ve mikro ölçekte sentezlenmiştir. Bu toz karışımlarına soğuk pres yöntemiyle şekil verildikten sonra sinterleme işlemi uygulanmıştır. SEM, XRD ve XPS karakterizasyonları gerçekleştirilmiş, kapasitans ve manyetometri ölçümleri yapılmıştır. Sonuç olarak, oda sıcaklığında yarı iletken davranışa ve ferroelektrik özelliğe sahip nano boyutlu katkılı ve katkısız BaTiO3 seramik tozlar elde edilmiştir. Ayrıca gerçekleştirilen karakterizasyon sonuçlarında kullanılan katkı malzemeleri içinde en uygun katkı malzemesi Sb olarak tespit edilmiştir.

Keywords

• Baryum titanat
• ferroelektrik
• katkılandırma
• nano-seramikler

Thanks

Bu çalışma, Dumlupınar Üniversitesi BAP ofisi (Proje No: 2017-62) tarafından finansal olarak desteklenmiştir. Yazarlar, katkılarından ötürü DPU-BAP 2017-62 nolu proje ekibine ve Musa AKMAN’a, bu araştırmanın gerçekleştirildiği Dokuz Eylül Üniversitesi, Elektronik Malzeme Üretim ve Uygulama Merkezi’ne (EMUM) ve sağladığı destek için EMUM çalışanları ile Çağlar ÖZER’e minnettardır.

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