Sains Malaysiana 38(1): 103-107(2009)

 

 

Heat Treatment And Characterization of Yb Doped Barium

 Cerate Prepared via Sol-Gel Technique

(Rawatan Haba dan Pencirian Barium Serat Terdop Yb yang

disediakan Melalui Teknik Sol-Gel)

 

Nafisah Osman*, Ibrahim Abu Talib** & Hamidi Abd Hamid

Faculty of Applied Sciences

Universiti Teknologi MARA

02600 Arau, Perlis, Malaysia

 

**Faculty of Science & Technology

Universiti Kebangsaan Malaysia

43600 Bangi, Selangor, Malaysia

 

Received:  24 March 2008 / Accepted: 10 May 2008

 

 

ABSTRACT

 

The BaCe0.95Yb0.05O2.975 compound was successfully prepared by the sol-gel method using metal acetate salts as starting materials. Fourier transform infrared (FTIR) results showed that the carbonate ions residue almost disappeared at calcination temperature of 1300 oC. Particles size of the final calcined powder obtained from particle size distribution was in the range of 300-450 nm. Diameter of grains for the sintered pellet (relative density ≈85 %) obtained from scanning electron microscope was between 2-5 μm. It is interesting to note that eliminating the carbonate ions residue  enhanced the mechanical and chemical stability of the sample.

 

Keywords: Yb-doped BaCeO3; sol-gel method; microstructure; mechanical stability

 

 

ABSTRAK

 

Sebatian BaCe0.95Yb0.05O2.975 telah berjaya disediakan melalui kaedah sol-gel menggunakan garam berasaskan asetat. Keputusan daripada spektroskopi transformasi Fourier infra-merah (FTIR) menunjukkan bahawa sisa ion karbonat hampir dapat disingkirkan pada suhu kalsinan 1300 oC. Saiz partikel bagi serbuk yang di ambil pada tahap akhir proses kalsinan didapati berada pada julat 300-450 nm. Diameter butiran bagi pellet yang di sinter (ketumpatan relatif ≈85 %) yang diperolehi dari mikroskop imbasan elektron adalah berada di antara 2-5 μm. Adalah menarik untuk di nyatakan bahawa dengan menyingkirkan sisa ion karbonat telah didapati meningkatkan kestabilan mekanik dan kimia sampel.

 

Kata kunci: BaCeO3 terdop Yb; kaedah sol-gel; mikrostruktur; kestabilan mekanik

 

 

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