SYNTHESIS AND DIELECTRIC PROPERTIES OF FOUR-LAYERED AURIVILLIUS SrBi4Ti4O15  DOPED Nd3+ AND Mn4+

Synthesis of four-layered Aurivillius compound doped with Nd3+ and Mn4+ cations, SrBi3.5Nd0.5Ti4-xMnxO15 (x = 0; 0.5; 1) was carried out using molten salt method with a mixture of Na2SO4/K2SO4 as a flux. The synthesized products were characterized using X-ray diffraction (XRD) and refined by Le Bail technique. The results of XRD analysis show that the four-layered Aurivillius compound formed, however there are additional peaks identified as perovskite and Bi7.68Ti0.32O12.16 phases for x = 0 and perovskite and Sr4Ti3O10phases for x = 0.5 and 1. The results of refinement show that four-layered Aurivillius phase formed has orthorhombic symmetry with A21am space group. Scanning Electron Microscopy (SEM) shows the plate like morphology that are characteristic of Aurivillius compound. Dielectric constant of the samples show increasing value as increasing of Mn4+ concentration.

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

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.14.1.14476.143-151 ◽

2018 ◽

Vol 14 (1) ◽

pp. 143

Author(s):

Zulhadjri Zulhadjri ◽

Rini Ramadhani ◽

Aulia Arivin Billah ◽

Syukri Arief ◽

Emriadi Emriadi

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Single Phase ◽

Double Exchange ◽

Orthorhombic Symmetry ◽

X Ray Diffraction ◽

Aurivillius Phase ◽

X Ray ◽

Scanning Electron

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

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.14.1.14476.160-167 ◽

2018 ◽

Vol 14 (1) ◽

pp. 160

Author(s):

Zulhadjri Zulhadjri ◽

Rini Ramadhani ◽

Aulia Arivin Billah ◽

Syukri Arief ◽

Emriadi Emriadi

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Single Phase ◽

Double Exchange ◽

Orthorhombic Symmetry ◽

X Ray Diffraction ◽

Aurivillius Phase ◽

X Ray ◽

Scanning Electron

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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Phase Development and Dielectric Properties of 0.98BaTiO3-0.02Ba (Mg1/3Nb2/3) O3 Ceramic

Materials Science Forum ◽

10.4028/www.scientific.net/msf.700.58 ◽

2011 ◽

Vol 700 ◽

pp. 58-62

Author(s):

Rachanusorn Roongtao ◽

Supagorn Rugmai ◽

Wanwilai C. Vittayakorn

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Dielectric Constant ◽

Dielectric Properties ◽

Loss Factor ◽

X Ray Diffraction ◽

Phase Purity ◽

X Ray ◽

Phase Development ◽

Scanning Electron

The 0.98BaTiO3-0.02Ba (Mg1/3Nb2/3) O3ceramics has been synthesized through a conventional mixed-oxide by using BT nanopowder and BMN micropowder. The phase purity of the powders and the ceramics was examined using X-ray diffraction (XRD). The 0.98BT-0.02BMN powders were sintered to 92% of the theoretical density at a temperature of 1300 °C for 2 h. The microstructure of the sintered surface was investigated using scanning electron microscopy (SEM). The dielectric constant (εr) and loss factor (tanδ) of the sintered pellets at Curie temperture were 3000 and 0.015, respectively.

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Hydrothermal synthesis and characteristics of lanthanumdoped pb(Zr₀.₆₅Ti ₀.₃₅)O₃ ceramics

Nuclear Science and Technology ◽

10.53747/jnst.v8i3.69 ◽

2021 ◽

Vol 8 (3) ◽

pp. 14-19

Author(s):

Thuy Nguyen Thanh ◽

Tung Nguyen Van ◽

Hung Nguyen Trong ◽

Minh Cao Duy

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Dielectric Constant ◽

Reaction Temperature ◽

Lead Zirconate Titanate ◽

Lead Zirconate ◽

X Ray Diffraction ◽

X Ray ◽

Influence Of Ph ◽

Scanning Electron

Lanthanum-doped lead zirconate titanate (PLZT) powders were synthesized using thehydrothermal method. The influence of pH, reaction temperature and time, lanthanum concentration on the formation and characteristics of PLZT were investigated. Obtained powders were investigated using X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) techniques and a dielectric analyzer. The results showed that Pb1-xLax(Zr0.65Ti0.35)O3 with x= 0.0 – 0.1 were well formed under conditions: pH≥13, reaction time of 12hrs, reaction temperature of 180oC. Dielectric constant of PLZT is higher than PZT. The grain size of the PLZT is found to be 1–3.5 µm.

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Preparation and Electrical Properties of Ba0.85Sr0.15Ti0.90Zr0.10O3 Ceramics Doped Sn by Seed-Induced Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.804.80 ◽

2015 ◽

Vol 804 ◽

pp. 80-83

Author(s):

Krit Sutjarittangtham ◽

Sukum Eitssayeam ◽

Uraiwan Intatha ◽

Wilaiwan Leenakul

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Dielectric Constant ◽

Electrical Properties ◽

Powder Diffraction ◽

Molten Salt Method ◽

X Ray ◽

Eutectic Mixtures ◽

Maximum Dielectric Constant ◽

Scanning Electron

Ba0.85Sr0.15Ti0.90Zr0.10O3 (BSZT) ceramics doped Sn was prepared by seed-induced method. The seed was prepared by molten salt method, NaCl-KCl (1:1 by mole) eutectic mixtures was used as the flux. The BSZT added seed with doped SnO were calcined at 1250 °C for 3 hrs and sintered at 1400 °C for 2 hrs, respectively. The phase formation and morphology of these samples were characterized via X-ray powder diffraction and scanning electron microscopy, respectively. From the above studies, it has been concluded that the maximum dielectric constant is 19147 at BSZT ceramics prepared by seed-induce method.

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Comparison of Mechanical Properties and Microstructure of Annealed and Quenched Ti-Nb Alloys

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.769.29 ◽

2018 ◽

Vol 769 ◽

pp. 29-34 ◽

Cited By ~ 3

Author(s):

Alexander Thoemmes ◽

Ivan V. Ivanov ◽

Adelya A. Kashimbetova

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Scanning Electron Microscopy ◽

Xrd Analysis ◽

X Ray Diffraction ◽

X Ray ◽

Β Phase ◽

Α Phase ◽

Nb Content ◽

Scanning Electron

The effect of Nb content on microstructure, mechanical properties and phase formation in annealed and quenched binary Ti-Nb alloys were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analysis. The content of Nb varied in the range 0-37 mass % leading to significant changes in the microstructure. The annealed and furnace-cooled binary Ti-Nb samples exhibited HCP martensitic α` phase at a Nb content below 14 mass % and stable BCC β phase at higher contents of Nb. The structure of the quenched samples changed with increase of Nb content in the following order: coarse primary martensite → fine acicular (α`+α``) martensite → single β phase structure. The mechanical properties of alloys strongly depended on the Nb content and type of the dominating phase.

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High Sensitivity Electrochemical Multisensors based on Graphene-PANI Nanocomposite for Simultaneous Detection of Glucose and Urea

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v19i3.311 ◽

2016 ◽

Vol 19 (3) ◽

pp. 145-150 ◽

Cited By ~ 1

Author(s):

Meysam Karimi ◽

Mohammad Rabiee ◽

Mojgan Abdolrahim ◽

Mohammadreza Tahriri ◽

Daryoosh Vashayee ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Cyclic Voltammetry ◽

Simultaneous Detection ◽

High Sensitivity ◽

Xrd Analysis ◽

Experimental Results ◽

X Ray Diffraction ◽

X Ray ◽

Scanning Electron

We present a study of the effect of graphene–PANI nanocomposites on the sensitivity of the urea and glucose multisensory. We used an electroctrochemical multisensor based on two electrodes located in a reservoir with two separate channels. The urease and glu-cose oxidase (GOD) were employed for detecting the urea and glucose, respectively. We characterized the graphene and graphene-PANI samples with X-ray Diffraction (XRD) analysis and scanning electron microscopy (SEM) observations. We further performed the Cyclic voltammetry and Amperometry tests. The collected experimental results revealed that the intensity of the peak significantly increases with the concentration of the urea and glucose.

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Fabrication of Highly Ordered Arrays of TiO2 Nanotubes on Ti Wires

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.624.63 ◽

2012 ◽

Vol 624 ◽

pp. 63-66

Author(s):

Ming Ya Li ◽

Jian Min Wang ◽

Jing Guo ◽

Yue Liu Li ◽

Xiao Qiang Wang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Xrd Analysis ◽

Internal Diameter ◽

Outer Diameter ◽

X Ray Diffraction ◽

X Ray ◽

Ordered Arrays ◽

Glycol Solution ◽

Scanning Electron

Highly Ordered arrays of TiO2 nanotubes on Ti wire were prepared by anodic oxidation with ethylene glycol solution of NH4F electrolyte. The phase compositions of the samples were characterized using X-ray diffraction (XRD) analysis using Cu-Kα radiation. The microstructure was observed using scanning electron microscopy (SEM). Experimental results show that at the anode condition of 95V, 50°C, and then themal treatment at 550°C, the highly ordered anatase TiO2 nanotubes arrays arranged on the surface of Ti wire. The length of the nanotube achieved was about 31μm, the internal diameter and outer diameter of the nanotube was 127nm and 170nm, respectively.

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Higher Photocatalytic Activity of P-Incorporated TiO2 Nanotube Arrays

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1087.452 ◽

2015 ◽

Vol 1087 ◽

pp. 452-456

Author(s):

Khairul Arifah Saharudin ◽

Srimala Sreekantan

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Degradation Rate ◽

Oxygen Vacancies ◽

Xrd Analysis ◽

Nanotube Arrays ◽

Photoluminescence Spectra ◽

X Ray Diffraction ◽

X Ray ◽

Scanning Electron

TiO2 nanotubes arrays were prepared by anodization of Ti in EG containing H3PO4 and NH4F electrolyte. The samples were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray spectroscopy (EDX) and photoluminescence spectra (PL). The as-anodized TiO2 nanotubes were annealed in inert (argon), reducing (nitrogen), or oxidizing (oxygen) atmosphere at 400 °C for 4 hr. XRD analysis revealed that the TiO2 nanotubes were anatase after annealing. In this study, the TiO2 nanotubes annealed in argon exhibited the highest degradation rate of methyl orange (MO) solution under ultraviolet irradiation among the samples. The degradation rate was approximately 98% after 5h, which may be ascribed to the large amount of oxygen vacancies and defects (phosphorus) within the Ar - TiO2 sample that simultaneously increased the degradation rate of MO.

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