Sains Malaysiana 52(4)(2023): 1303-1314

http://doi.org/10.17576/jsm-2023-5204-20

Kesan Suhu Pensinteran terhadap Mikrostruktur dan Sifat Mekanikal Perovskit Seramik SrFe_0.9Ti_0.1O_3-δ-SDC

(Effect of Sintering Temperature on the Microstructure and Mechanical Property of SrFe_0.9Ti_0.1O_3-δ-SDC Ceramic Perovskite)

AZREEN JUNAIDA ABD AZIZ¹, NURUL AKIDAH BAHARUDDIN^1,*, MAHENDRA RAO SOMALU¹, ANDANASTUTI MUCHTAR^1,2 & SAHRIM HAJI AHMAD³

¹Solid Oxide Fuel Cell Group, Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

²Department of Mechanical & Manufacturing Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

³Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor Darul Ehsan, Malaysia

Diserahkan: 31 Januari 2022/Diterima: 20 Mac 2023

Abstrak

Kesan suhu sinter ke atas sifat bahan seramik perovskit SrFe_0.9Ti_0.1O_3-δ-SDC dikaji di dalam penyelidikan ini. Pada asasnya, proses sinter dilakukan bagi memperkecilkan keliangan di dalam sesuatu bahan yang telah dipadatkan. Melalui kajian ini, tiga suhu digunakan untuk mengkaji kesan suhu sinter iaitu 1200, 1250, 1300 °C. Bahan seramik yang diperbuat daripada SDC terlebih dahulu dibentuk menjadi sel butang dengan mengenakan tekanan ekapaksi 5.2MPa. Dakwat seramik 5SrFe_0.9Ti_0.1O_3-δ-5SDC dicetak ke atas kedua-dua permukaan sel butang bagi menghasilkan sel simetri elektrod/elektrolit/elektrod. Kesemua sel ini dibakar dengan 3 suhu sinter yang berbeza. Sifat fizikal dan morfologinya dikaji. Hasil kajian ini mendapati sel simetri yang dikenakan suhu yang berbeza mempengaruhi sifat bahan tersebut. Kenaikan suhu sinter menyebabkan bahan menjadi semakin aglomerat dan keliangan semakin berkurang sehingga 24.38%. Ketumpatan bahan juga semakin meningkat dan menyebabkan bahan mudah patah. Ketahanan bahan berkurang dengan kenaikan suhu. Dalam kajian ini, bahan 5SrFe_0.9Ti_0.1O_3‒δ-5SDC didapati sesuai disinter pada suhu 1250 °C kerana memberikan nilai keliangan, kadar penggumpalan, ketumpatan dan dan ketahanan yang baik pada ketika itu.

Kata kunci: Kekerasan; mikrostruktur; pensinteran; perovskit; seramik

Abstract

Sintering temperature effects on perovskite ceramic SrFe_0.9Ti_0.1O_3-δ-SDC was investigated in this research. A fact that the sintering process was carried out to reduce the porosity in the materials that have been pressed. Three different temperatures used in this research range from 1200, 1250, and 1300 °C. The button cell was developed from the ceramic material SDC with 5MPa pressure. 5SrFe_0.9Ti_0.1O_3-δ-5SDC ink was printed on top of the button cell on each side to build a symmetrical cell with a configuration electrode/electrolyte/electrode. All symmetrical cells were sintered at 3 different temperatures. Physical and morphology were studied. It was found that symmetrical cells with different sintering temperatures show a different character. The porosity tends to decrease up to 24.38% with the increase of sintering temperature, therefore, increasing the agglomeration and decreasing the strength of the materials. In this study, the material 5SrFe_0.9Ti_0.1O_3‒δ-5SDC is suitable to sinter at 1250 °C and gives the best porosity, aggregation rate, and density while providing a good endurance.

Keywords: Ceramic; hardness; microstructure; perovskite; sintering

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^*Pengarang untuk surat-menyurat; email: akidah@ukm.edu.my