Electron microscopy of barium strontium titanate nanostructures in the aluminum oxide matrix

2009 ◽  
Vol 51 (7) ◽  
pp. 1485-1488 ◽  
Author(s):  
O. M. Zhigalina ◽  
K. A. Vorotilov ◽  
A. N. Kuskova ◽  
A. S. Sigov
Keyword(s):  
Electron Microscopy ◽  
Aluminum Oxide ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Barium Strontium ◽  
Titanate Nanostructures ◽  
Oxide Matrix

scholarly journals KARAKTERISASI KAPASITOR BARIUM STRONTIUM TITANAT (BST) Ba0,75 Sr0,25 TiO3 , YANG DIBUAT MENGGUNAKAN METODE SOL-GEL

2019 ◽  
Vol 16 (1) ◽  
pp. 65
Author(s):  
Rahmi Dewi ◽  
Tiara Pertiwi ◽  
Krisman Krisman
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dielectric Constant ◽  
Impedance Spectroscopy ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Sol Gel ◽  
Barium Strontium ◽  
Scanning Electron

The thin film of Barium Strontium Titanate (BST) has been studied withcomposition ofby using sol-gel method that annealed in temperature of 600oC and 650oC. The thin film of BST is characterized by using Field Emission Scanning Electron Microscopy (FESEM) and an impedance spectroscopy. The results of  FESEM characterization for samples in temperature of 600oC and 650oC are 55.83 nm and 84.88 nm in thickness respectively. The result of impedance spectroscopy characterization given frequency values obtained by the impedance value of real and imaginary.The capacitance value at a frequency of 20 Hz from a thin film of BST in temperature of 600oC and 650oC are 69.36Fand138.70F. The dielectric constant of the thin film of BST in temperature of 600oC and 650oC are 22.17 dan 131.56 respectively.

Preparation and Characterization of Nanosized Barium-Strontium Titanate Immobilized on Aluminum Oxide and its Application in Separation of Cr(III) and Cr(VI)

2010 ◽  
Vol 152-153 ◽  
pp. 1013-1016
Author(s):  
Hong Wang ◽  
Jing Yang
Keyword(s):  
Aluminum Oxide ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Sol Gel ◽  
Complete Separation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ph Values ◽  
Barium Strontium

Nanometer barium-strontium titanate based coated aluminum oxide (ABST) was prepared by the sol–gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectrophotometry (FTIR). Its application in speciation of Cr(III) and Cr(VI) from water were studied. The results showed that the nanometer barium-strontium titanate was immobilized on aluminum oxide firmly, becoming a new adsorbent. Two forms of chromium showed different exchange capacities at different pH values, viz. Cr (III) selectively retained at pH 10–13, whereas Cr (VI) retained at pH 1. Hence complete separation of the two forms of chromium is possible. Retained species were eluted with 5mL of 1 mol•L−1 HCl and 1 mol•L−1 NaOH. The Cr(III) and Cr(VI) concentration was measured by atomic absorption spectroscopy. The adsorbent had a promising prospect in the separation of Cr(III) and Cr(VI) in environment water.

scholarly journals Karakterisasi Mikrostruktur Material Feroelektrik Ba0.8Sr0.2TiO3 (BST) dengan Variasi Suhu Annealing (Halaman 70 s.d. 72)

2015 ◽  
Vol 18 (53) ◽  
Author(s):  
Rahmi Dewi ◽  
Krisman ◽  
Khaironiati ◽  
Fauziana
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Barium Strontium ◽  
Scanning Electron

Sampel Barium Strontium Titanate, Ba0.8Sr0.2TiO3 (BST) telah disediakan dengan menggunakan reaksi kimia padatan. Mikrostruktur sampel telah dikarakterisasi dengan menggunakan teknik difraksi sinar-X (XRD) dan Scanning  Electron Microscopy (SEM). Sampel disediakan dengan variasi suhu yang berbeda yaitu pada suhu 600oC, 700 oC dan 800oC selama 60 menit di udara. Karakterisasi XRD menunjukkan dengan meningkatnya suhu annealing maka kristaline sampel semakin meningkat dengan struktur tetragonal. Karakterisasi SEM menunjukkan sampel adalah homogen dengan ukuran butiran  seragam. Ukuran butiran sampel akan bertambah dengan bertambahnya suhu annealing. Seluruh sampel mempunyai ukuran butiran dalam nanometer.

Preparation and Characterization of Nanosized Barium-Strontium Titanate Immobilized on Aluminum Oxide and Its Application in Adsorption

2010 ◽  
Vol 26-28 ◽  
pp. 682-685 ◽  
Author(s):  
Dong Zhang ◽  
Chun Li Zhang
Keyword(s):  
Aluminum Oxide ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Composite Adsorbent ◽  
Cadmium Ions ◽  
Lead And Cadmium ◽  
Barium Strontium

Nanometer barium-stroutium titanate immobilized on aluminum oxide (ABST) was prepared by the citric acid sol–gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectrophotometry (FTIR). Its Pb2+ and Cd2+ adsorption properties from water were studied. Adsorption and elution were investigated under different conditions. The results showed that the nanometer barium-strontium titanate was immobilized on aluminum oxide firmly, becoming a composite adsorbent. The lead and cadmium ions were quantitatively retained at pH 5-8; their adsorption capacities of ABST were 70.28 mg•g－1 and 8.12 mg•g－1, respectively. The adsorbent of adsorped lead and cadmium ions were regenerated completely by elution with 1 mol•L－1 HNO3. The adsorbent had a promising prospect in analyticl chemistry and water treatment.

Tunability of band-gap in barium strontium titanate films on anodic aluminum oxide templates

2018 ◽  
Vol 649 ◽  
pp. 187-191 ◽  
Author(s):  
Hong Yan ◽  
Junyuan Wang ◽  
Bing Yang ◽  
Shuanhu Wang ◽  
Hui Xing ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Band Gap ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Anodic Aluminum Oxide ◽  
Anodic Aluminum ◽  
Barium Strontium ◽  
Anodic Aluminum Oxide Templates

Pembuatan dan Karakterisasi Kapasitor Barium Strontium Titanat (Bst) Ba0,75 Sr0,25 TiO3

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Rahmi Dewi ◽  
Krisman Krisman ◽  
Tiara Pertiwi ◽  
Tengku Luqman
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Impedance Spectroscopy ◽  
Field Emission ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Sol Gel ◽  
Barium Strontium ◽  
Scanning Electron

Lapisan tipis Barium Strontium Titanate (BST) telah ditelaah dengan komposisi  Ba0.75 Sr0.25 TiO3 menggunakan metode sol-gel yang digabungkan pada suhu 600 dan 650oC. Lapisan tipis BST dikarakterisasi menggunakan Field Emission Scanning Electron Microscopy (FESEM) dan spektroskopi impedansi. Hasil dari karakterisasi FESEM untuk sampel pada suhu 600 dan 650oC ialah 55.83 nm dan 84.88 nm dari segi ketebalan secara berurutan. Hasil dari karakterisasi spektroskopi impedansi berdasarkan nilai frekuensi menunjukkan nilai impedansi yang nyata dan imajiner. Nilai kapasitsa pada frekuensi 20 Hz dari lapisan tipis BST pada suhu 600 dan 650oC ialah 69.36 dan 138.70 F. Konstanta dielektrik dari lapisan tipis BST pada suhu 600 dan 650oC ialah 22.17 dan 131.56 secara berurutan.   The thin film of Barium Strontium Titanate (BST) has been studied with composition of Ba0.75 Sr0.25 TiO3 by using sol-gel method that annealed in temperature of 600oC and 650oC. The thin film of BST is characterized by using Field Emission Scanning Electron Microscopy (FESEM) and an impedance spectroscopy. The results of FESEM characterization for samples in temperature of 600 dan 650oC are 55.83 nm and 84.88 nm in thickness respectively. The result of impedance spectroscopy characterization given frequency values obtained by the impedance value of real and imaginary.The capacitance value at a frequency of 20 Hz from a thin film of BST in temperature of 600 dan 650oC are 69.36 F and 138.7oF. The dielectric constant of the thin film of BST in temperature of 600 dan 650oC are 22.17 and 131.56 respectively.

scholarly journals Microwave-Assisted Synthesized Gadolinium Doped Barium Strontium Titanate Nanostructures: Structural and Optical Properties for DSSC Applications

2021 ◽  
Vol 1 (1) ◽  
pp. 71-82
Author(s):  
V. Kavitha ◽  
V. Ragavendran ◽  
N. Sethupathi ◽  
Suresh Sagadevan ◽  
V. Sasirekha ◽  
...  
Keyword(s):  
Optical Properties ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
Solid State Reaction Method ◽  
Potential Candidate ◽  
Cubic Crystal ◽  
Dye Sensitized ◽  
Microwave Assisted ◽  
Barium Strontium ◽  
Titanate Nanostructures

Gadolinium (Gd) doped barium strontium titanate (BST) was prepared using the microwave-assisted solid-state reaction method for dye sensitized solar cell (DSSC) applications. The optical properties and the structural analysis of the prepared samples reveal the optical band gap and the morphology. The XRD pattern of the annealed samples confirms the polycrystalline nature with the cubic crystal structure. When the dopant is added, the bandgap increases slightly from 3.11 to 3.27 eV. The J-V characteristics of DSSCs prepared with pure and doped BST were investigated. The efficiency of the DSSCs remained constant and there is a slight increase in the Jsc for highly doped samples under 1-sun illumination. Gadolinium doped barium strontium titanate shows variation in the J-V characteristics and could be a potential candidate for the solar photovoltaic applications.

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