ALCHEMY Jurnal Penelitian Kimia
Vol 14, No 1 (2018): March

Sintesis Senyawa Aurivillius Ca1-xBi3,5+xLa0,5Ti4-xMnxO15: Struktur dan Sifat Dielektrik

Zulhadjri Zulhadjri (Jurusan Kimia FMIPA Universitas Andalas, Padang Kampus Unand Limau Manis, Padang – Sumatera Barat, telp./ fax. 0751-71681)
Rini Ramadhani (Jurusan Kimia FMIPA Universitas Andalas, Padang Kampus Unand Limau Manis, Padang – Sumatera Barat, telp./ fax. 0751-71681)
Aulia Arivin Billah (Jurusan Kimia FMIPA Universitas Andalas, Padang Kampus Unand Limau Manis, Padang – Sumatera Barat, telp./ fax. 0751-71681)
Syukri Arief (Jurusan Kimia FMIPA Universitas Andalas, Padang Kampus Unand Limau Manis, Padang – Sumatera Barat, telp./ fax. 0751-71681)
Emriadi Emriadi (Jurusan Kimia FMIPA Universitas Andalas, Padang Kampus Unand Limau Manis, Padang – Sumatera Barat, telp./ fax. 0751-71681)



Article Info

Publish Date
15 Feb 2018

Abstract

Sintesis senyawa feroelektrik yang berbasis fasa Aurivillius berlapis empat (n = 4) yang didadah kation La3+ dan Mn3+, Ca1-xBi3,5+xLa0,5Ti4-xMnxO15 dengan x = 0, 0,2, 0,4, 0,6, 0,8, dan1 telah dilakukan dengan teknik lelehan garam. Karakterisasi produk dengan difraksi sinar-X (XRD) menunjukkan bahwa fasa tunggal Aurivillius ditunjukkan oleh sampel dengan x = 0, 0,2, 0,4, dan 0,6. Refinement struktur dengan teknik Le Bail diketahui bahwa senyawa Aurivillius yang terbentuk sesuai dengan simetri ortorombik dan grup ruang A21am. Analisis dengan Scanning Electron Microscopy (SEM) untuk semua sampel memperlihatkan morfologi sampel berupa lempengan yang merupakan ciri khas senyawa Aurivillius. Nilai konstanta dielektrik sampel dan konduktivitasnya mengalami kenaikan dengan meningkatnya x. Konduktivitas paling tinggi dimiliki oleh sampel x = 0,2 yang diperkirakan akibat adanya interaksi pertukaran ganda (double exchange) antara Mn3+ dan Mn4+.Synthesis of Aurivillius Compounds Ca1-xBi3,5 + xLa0,5Ti4-xMnxO15: Structure and Dielectric Properties. Synthesis of ferroelectric compounds based on a four-phase Aurivillius phase (n = 4) which is doped with La3+ and Mn3+ cations, Ca1-xBi3,5+xLa0,5Ti4-xMnxO15 with x = 0, 0.2, 0.4, 0.6, 0 , 8, and 1 were carried out by molten salts technique. Characterization of products using X-ray diffraction (XRD) revealed that the single phase Aurivillius was shown by the samples with x = 0, 0,2, 0,4, and 0,6. The results of refinement show that the Aurivillius phase formed has orthorhombic symmetry with A21am space group. Morphology analysis by scanning electron microscopy (SEM) for all samples shows the plate-like as the characteristic of Aurivillius compounds. The value of dielectric constant and conductivity of the samples increases as increase of x. The conductivity of x = 0.2 is the highest predicted due to the interaction of double exchange between Mn3+ and Mn4+.

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Journal Info

Abbrev

alchemy

Publisher

Subject

Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology

Description

ALCHEMY Jurnal Penelitian Kimia is a chemistry journal published by Sebelas Maret University, Surakarta. ALCHEMY Jurnal Penelitian Kimia publishes original research articles or review articles in organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry, and ...