Sintesis Dan Karakterisasi Feroelektrik (1-X)Bst-Xknn (X=0,1; 0,2)

KAUKABA, YHUANITA NURUL (2018) Sintesis Dan Karakterisasi Feroelektrik (1-X)Bst-Xknn (X=0,1; 0,2). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sintesis material (1-x)Ba0.85Sr0.15TiO3 –x (K0.5Na0.5)NbO3 (BST-KNN) dengan variasi doping {x=0,1; 0,2} telah berhasil dilakukan dengan metode reaksi padat dengan temperatur kalsinasi 700°C selama 2 jam dan sintering 1200°C selama 2 jam. Tujuan dari penelitian ini adalah mengetahui pengaruh penambahan KNN terhadap struktur kristal dan menganalisis sifat listrik ferroelektrik pada material BST-KNN. Karakterisasi sampel dilakukan menggunakan analisis X-Ray Diffractometer (XRD), analisis uji densitas dengan metode Archimedes, dan analisis sifat listrik dengan menggunakan Impedance Analyzer. Dari hasil analisa XRD diperoleh bahwa campuran BST-KNN membentuk fasa BaSrTiO3 dengan struktur kristal Tetragonal. Pendopingan KNN telah berhasil larut dalam struktur BST dan mempengaruhi struktur Kristal dari BST yang ditunjukkan dengan nilai tetragonalitas (c/a) yang meningkat dengan bertambahnya dopan KNN. Akibat pendopingan KNN, terjadi perubahan sifat dari material BST yang awalnya bersifat feroelektrik menjadi relaxor. Karakterisasi relaksasi dipole menunjukkan adanya dipole granuler pada BST yang didoping KNN akibat adanya muatan ruang disamping dipole kisi. ========================================================== Synthesis of (1-x)Ba0.85Sr0.15TiO3–x(K0.5Na0.5)NbO3 (BST-KNN) with doping variation {x = 0,1; 0,2} was successfully performed by a solid reaction method with a calcination temperature of 700 ° C. for 2 hours and sintering 1200 ° C. for 2 hours. the aim of this research is to know the effect of KNN addition to the crystal structure and to analyze the electrical properties of ferroelectric on BST-KNN material. The sample characterization was done using X-Ray Diffractometer (XRD) analysis, density test analysis by Archimedes method, and electrical properties analysis by using Impedance Analyzer. From the result of XRD analysis, the mixture of BST-KNN formed BaSrTiO3 phase with crystal structure is Tetragonal. KNN has succeeded in dissolving in the BST structure and affecting the crystalline structure of BST as indicated by the increased value of tetragonality (c/a) as KNN dopant increases. As a result of BST doped KNN, there is a change in the nature of the originally ferroelectric BST material into a relaxor behavior. Dipole relaxation characterization shows the presence of granular dipoles in the BST doped KNN due to space charge beside the lattice dipole.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: doping, feroelektrik, polarisasi dipole
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC610.3 Electric conductivity
Divisions: Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis
Depositing User: Yhuanita Nurul Kaukaba
Date Deposited: 21 Jun 2021 10:49
Last Modified: 21 Jun 2021 10:49
URI: https://repository.its.ac.id/id/eprint/54550

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