Optimizing Structural and Electrical Properties of PMN-PT-PMS Ceramics via Sintering Temperature

Year 2017, Volume: 5 Issue: 2, 144 - 152, 01.06.2017

Osman Düzen Volkan Kalem

https://doi.org/10.15317/Scitech.2017.78

Abstract

Pseudo-ternary piezoelectric ceramics of PMN-PT [Pb(Mg1/3Nb2/3)O3-PbTiO3] composition

modified with PMS [Pb(Mn1/3Sb2/3)O3] were produced by solid-state sintering method using different

temperatures in a range of 1100-1250 °C. The effect of sintering temperature on the crystal phases,

microstructure and electrical properties were systematically investigated. Microstructural and

compositional analyses have been carried out using scanning electron microscope (SEM) and X-ray

diffraction (XRD). Besides, electrical characterization was performed using an inductance-capacitanceresistance

(LCR) meter, impedance analyzer and a Berlincourt d33-piezometer. XRD and SEM results

indicated that the sintering temperature was effective on the formation of a homogeneous

microstructure and a pure perovskite structure. Densification during sintering could not be completed

and pure perovskite structure was not o tained at 1150 °C and lower sintering temperatures.

Furthermore, sintering at temperatures higher than 1200 °C resulted in heterogeneous microstructure.

The high dielectric and piezoelectric response of PMN-PT-PMS ceramics is considered to be a result of

their high densities and homogeneous microstructure obtained via proper sintering condition. The

results showed that the ceramic samples sintered at 1175 °C for 2 h possessed the optimum properties

(d33=265 pC/N, KT=4745, kp=0.417, tanδ=2.5%, Qm=222).

Keywords

Piezoelectric properties, Sintering, PMN-PT

PMN-PT-PMS SERAMİKLERİNDE SİNTERLEME SICAKLIĞI ETKİSİYLE YAPISAL VE ELEKTRİKSEL ÖZELLİKLERİN OPTİMİZASYONU

Abstract

PMS [Pb(Mn1/3Sb2/3)O3] ile katkılanmış PMN-PT [Pb(Mg1/3Nb2/3)O3-PbTiO3] üçlü piezoelektrik

seramikleri (PMN-PT-PMS) 1100–1250 °C aralığında farklı sinterleme sıcaklıklarının kullanıldığı katı-hal

reaksiyon yöntemi ile üretilmiştir. Sinterleme sıcaklığının kristal fazlar, mikroyapı ve elektriksel

özellikler üzerindeki etkisi sistematik olarak incelenmiştir. Mikroyapı ve kompozisyon analizleri

taramalı elektron mikrosko u SEM ve X-ışınları kırınımı XRD ile, elektriksel karakterizasyon ise

indüktans-kapasitans-direnç ölöer LCR metre , empedans analizöru ve Berlincourt d33-piezometre

kullanılarak gerçekleştirilmiştir. XRD ve SEM sonuçları, saf perovskit yapının ve homojen ir

mikroyapının elde edilmesinde sinterleme sıcaklığının etkili olduğunu ortaya koymuştur. 1150 °C ve

altındaki sinterleme sıcaklıklarında yoğunlaşma yetersiz olmakta ve saf perovskit yapı elde

edilememekte, 1200 °C’nin üstündeki sıcaklıklarda ise kurşun oksitin uçuculuğu nedeniyle heterojen ir

mikroyapı oluşmaktadır. Uygun sinterleme sıcaklığında elde edilen yüksek yoğunluk ve homojen

mikroyapı; PMN-PT-PMS seramiklerinin yüksek piezoelektrik ve dielektrik davranış sergilemesini

sağlamaktadır. Deneysel sonuçlar, 1175 °C’de 2 saat süre ile sinterlenmiş numunelerin optimum

elektriksel özellikler d33=265 pC/N, KT=4745, kp=0,417, tanδ=%2,5 ve Qm=222) sergilediğini göstermiştir.

Keywords

Piezoelektrik özellikler, Sinterleme, PMN-PT

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