scholarly journals Pembuatan Material Feroelektrik Barium Titanat (BaTiO3) Menggunakan Metode Solid State Reaction (Halaman 59 s.d. 61)

2015 ◽  
Vol 18 (53) ◽  
Author(s):  
Meisya Istiqomah ◽  
Anif Jamaluddin ◽  
Yofentina Iriani
Keyword(s):  
Solid State ◽  
Data Base ◽  
Solid State Reaction ◽  
Full Width Half Maximum ◽  
International Commission ◽  
Full Width ◽  
Half Maximum ◽  
X Ray Diffraction ◽  
X Ray

Pembuatan material feroelektrik Barium titanat (BaTiO3) berhasil dilakukan menggunakan metode solid state reaction (reaksi padatan). Barium carbonat (BaCO3) dan Titanium oksida (TiO2) dihomogenisasikan kemudian dipadatkan hingga berbentuk bulk. Sampel disintering pada temperatur 9000C dengan variasi waktu 5 dan 6 jam. Karakterisasi dilakukan dengan peralatan X-Ray Diffraction (XRD) Bruker D8 Advance bersumber radiasi Cu dengan panjang gelombang 1,54187 Å. Sampel dianalisa dengan International Commission Data Diffraction (ICDD) data base dan dilakukan penghalusan menggunakan metode Rietvield. Hasil analisa BaTiO3 pada waktu sintering 5 jam diperoleh nilai a dan b = 4,005895 serta nilai c = 4,030629. Nilai tetragonalitas 1,0061744, kristalinitas 94,50%, Full Width Half Maximum (FWHM) 0,2994 dan ukuran kristal 6,7243 nm. Waktu sintering 6 jam diperoleh nilai a dan b=4,000434 serta c= 4,021041, tetragonalitas 1,0051512, kristalinitas 79,91%, FWHM 0,26021 dan ukuran kristal 6,1207 nm.

Strain in Epitaxial BaTiO3 Thin Films Prepared by MOCVD

1998 ◽  
Vol 541 ◽  
Author(s):  
S. Chattopadhyay ◽  
A. Teren ◽  
B.W. Wessels
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Full Width Half Maximum ◽  
Diffraction Peak ◽  
Full Width ◽  
Half Maximum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Peak Broadening ◽  
Diffraction Peaks

AbstractThe microstrain in epitaxial BaTiO3 thin films has been investigated using x-ray diffraction. The full width half maximum of the (001) diffraction peaks ranged from 0.12 to 0.49 deg. From the analysis of the angular dependence of the diffraction peak broadening, it is concluded that the broadening is due predominantly to strain. The magnitude of the microstrain decreases sharply with increasing film thickness.

Preparation of Ultra–Fine La3NbO7 Powder by Solid State Reaction

2012 ◽  
Vol 512-515 ◽  
pp. 158-161 ◽  
Author(s):  
Ling Dai ◽  
Qiang Xu ◽  
Shi Zhen Zhu ◽  
Ling Liu
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Single Phase ◽  
Thermal Barrier ◽  
X Ray Diffraction ◽  
X Ray ◽  
Granular Particle ◽  
Fine Particle Size ◽  
Ultra Fine Particle ◽  
Different Temperatures

As a new candidate material for the ceramic layer in thermal barrier coatings (TBCs) system, La3NbO7 was synthesized with La2O3 powder and Nb2O5 powder by solid state reaction. The stating powders with a mole ratio of La to Nb of 3:1 were mixed and then the mixture was calcined under the different temperatures(800°C, 1000°C, 1200°C) and dwell times(2h, 6h, 10h). The phase structure of the powder was observed by X–ray diffraction(XRD), and the microstructure of the sample was observed by scanning electron microscope(SEM). The effect of calcination temperature and dwell Time on the phase formation were examined. The results indicate that the La3NbO7 powder with single phase can be synthesized successfully at 1200°C for 10h in air, and the La3NbOsub>7 powders synthesized have an ultra-fine particle size of 0.5˜1µm with a granular particle shape. With the temperature increasing, LaNbO4/sub> was synthesized firstly and then La3NbO7 was synthesized with a mole ratio of La2O3 to LaNbO4 of 1:1.

Thermal enhancement of 2H11/2→4I15/2 up-conversion luminescence of Er3+ doped K2Yb(PO4)(MoO4) phosphors

2021 ◽  
Author(s):  
Hongqiang Cui ◽  
Yongze Cao ◽  
Lei Zhang ◽  
Yuhang Zhang ◽  
Siying Ran ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Reaction Method ◽  
X Ray ◽  
Thermal Enhancement

Er3+ with different concentrations doped K2Yb(PO4)(MoO4) phosphors were prepared by a solid-state reaction method, and the layered orthorhombic crystal structure of the samples was confirmed by X-ray diffraction (XRD). Under...

Changes in Crystallite Size of Tricalcium Silicate during the Laboratory Grinding

2021 ◽  
Vol 321 ◽  
pp. 23-27
Author(s):  
Simona Ravaszová ◽  
Karel Dvořák
Keyword(s):  
Solid State ◽  
Crystallite Size ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Tricalcium Silicate ◽  
Planetary Mill ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Grinding Time

The paper is focused on one of the most important component of Portland clinker-on the tricalcium silicate. The study reported in this article is focuses on the changes in crystallite size of synthetic tricalcium silicate obtained using solid state reaction method. Crystallite size changes are monitored during the grinding in three types of laboratory mills in two different conditions. Changing in crystallite size at various grinding time up to 120 minutes are studied with the aid of X-ray diffraction and using the Scherrer equation. It has been found that the most efficient laboratory mill in terms of speed and fineness of the material was the planetary mill.

Karakterisasi Kekristalan dan Konstanta Dielektrik Barium Stronsium Titanat (BaxSr1-XTiO3) dengan Variasi Komposisi Barium Dan Stronsium Yang Dibuat Menggunakan Metode Solid State Reaction

2019 ◽  
Vol 4 (4) ◽  
Author(s):  
Alpi Zaidah
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Holding Time ◽  
X Ray Diffraction ◽  
X Ray

Pembuatan sampel barium stronsium titanat (BaxSr1-xTiO3) telah dilakukan dengan metode solid state reaction. Variasi komposisi mol Ba(x) untuk pembuatan sampel adalah x=0,4;0,3 dan 0,2. Sampel di-sintering pada suhu 1100oC dengan holding time 2 jam. Karakterisasi sampel dilakukan menggunakan peralatan X-Ray Diffraction (XRD) untuk mengetahui tingkat kekristalan dan ukuran kristal dari sampel. Sedangkan untuk mengetahui besarnya konstanta dielektrik menggunakan RLC-Meter.  Berdasarkan analisa dengan software GSAS, parameter kisi BaxSr1-xTiO3 yang sintering pada suhu 1100°C untuk x=0,4 adalah a=b=c=3,947 nm. Parameter kisi a=b=c=3,947 nm untuk x=0,3, dan parameter kisi a=b=c=3,939 nm untuk x=0,2. Nilai parameter kisi a=b=c menunjukkan struktur kristal berbentuk kubik. Ukuran kristal berturut-turut untuk x=0,4;0,3 dan 0,2 adalah 65 nm, 66 nm dan 69 nm. Ukuran kristal semakin besar seiring dengan meningkatnya penambahan Sr. Pengukuran konstanta dielektrik (K) dilakukan pada rentang frekuensi 1 kHz. Nilai K sampel dengan x=0,4;0,3 dan 0,2 masing-masing sebesar 265, 277 dan 307.

scholarly journals Impact of Lithium Composition on Structural, Electronic and Optical Properties of Lithium Cobaltite Prepared by Solid-state Reaction

2014 ◽  
Vol 6 (2) ◽  
pp. 217-231 ◽  
Author(s):  
F. Khatun ◽  
M. A. Gafur ◽  
M. S. Ali ◽  
M. S. Islam ◽  
M. A. R. Sarker
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Ionic Conductivity ◽  
Cathode Material ◽  
Solid State Reaction ◽  
Layered Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electronic And Optical Properties ◽  
Lithium Cobaltite

The lithium-cobalt oxide LixCoO2 is a promising candidate as highly active cathode material of lithium ion rechargeable batteries. The crystalline-layered lithium cobaltite has attracted increased attention due to recent discoveries of some extraordinary properties such as unconventional transport and magnetic properties. Due to layered crystal structure, Li contents (x) in LixCoO2 might play an important role on its interesting properties. LiCoO2 crystalline cathode material was prepared by using solid-state reaction synthesis, and then LixCoO2 (x<1) has been synthesized by deintercalation of produced single-phase powders. Structure and morphology of the synthesized powders were investigated by X-ray diffraction (XRD), Infrared spectroscopy, Impedance analyzer etc. The influence of lithium composition (x) on structural, electronic and optical properties of lithium cobaltite was studied. Temperature dependent electrical resistivity was measured using four-probe technique. While LixCoO2 with x = 0.9 is a semiconductor, the highly Li-deficient phase (0.75 ? x ? 0.5) exhibits metallic conductivity. The ionic conductivity of LixCoO2 (x = 0.5 – 1.15) was measured using impedance spectroscopy and maximum conductivity of Li0.5CoO2 was found to be 6.5×10-6 S/cm at 273 K. The properties that are important for applications, such as ionic conductivity, charge capacity, and optical absorption are observed to increase with Li deficiency. Keywords: Calcination; Characterization; Inorganic compounds; Solid-State reaction; X-ray diffraction. © 2014 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v6i2.17900 J. Sci. Res. 6 (2), 217-231 (2014)  

Effects of Sputtering Pressure on (ZnO)x(InN)1-x Crystal Film Growth at 450°C

2018 ◽  
Vol 941 ◽  
pp. 2093-2098
Author(s):  
Naho Itagaki ◽  
Kazuto Takeuchi ◽  
Nanoka Miyahara ◽  
Kouki Imoto ◽  
Hyun Woong Seo ◽  
...  
Keyword(s):  
Film Growth ◽  
Rf Magnetron Sputtering ◽  
Full Width ◽  
Half Maximum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal Film ◽  
Crystal Films ◽  
Sputtering Pressure

We studied effects of sputtering pressure on growth of (ZnO)x(InN)1-xcrystal films deposited at 450°C by rf magnetron sputtering. Epitaxial growth of (ZnO)x(InN)1-xfilms was realized on single-crystalline ZnO template. X-ray diffraction measurements show that full width at half maximum of the rocking curves from the (101) plane of the films reaches minimum value of 0.11º at 0.5 Pa. The sputtering gas pressure is a key tuning knob for controlling the crystal quality of ZION films.

La cristallinité de l'illite revisitée: un bilan des connaissances acquises ces trente dernières années

Clay Minerals ◽  
2001 ◽  
Vol 36 (2) ◽  
pp. 143-157 ◽  
Author(s):  
B. Kübler ◽  
D. Goy-Eggenberger
Keyword(s):  
Clay Minerals ◽  
Full Width ◽  
Half Maximum ◽  
X Ray Diffraction ◽  
Illite Crystallinity ◽  
X Ray ◽  
Diffraction Patterns ◽  
Gaseous Hydrocarbons ◽  
Definition Of ◽  
Technological Improvements

AbstractThe main reason for the initial determinations of illite crystallinity (IC) was to support the exploration for liquid and gaseous hydrocarbons. The application in 1960 of the Weaver Sharpness Ratio to core materials of a borehole from eastern France indicated that it was not a reliable tool for identifying well-crystallized illite. This ratio was later replaced by the Full Width at Half-Maximum (FWHM), the value of which decreases regularly and consistently towards greenschist facies. The use of FWHM allowed a precise definition of the anchimetamorphic zone between the upper diagenesis and the epimetamorphism. Afterwards, analysis of weak-tointermediate diagenetic sequences showed that illite crystallinity decreases together with the amount of swelling interlayers in mixed-layer clay minerals. Technological improvements, such as computing and modelling of X-ray diffraction patterns, increased the analytical precision relative to measurements of the plain FWHM. Consequently, illite crystallinity went back to its initial use, namely detection of the transitions between diagenesis, anchi- and epi-metamorphism in smectitefree lithologies, where it can be used as a stratigraphic and mineralogic marker of alteration stages.

Effect of Annealing on Electrical Degradation Characteristics of ZnO Varistors

2008 ◽  
Vol 388 ◽  
pp. 7-10 ◽  
Author(s):  
Masayuki Takada ◽  
Shinzo Yoshikado
Keyword(s):  
Grain Boundaries ◽  
Diffraction Peak ◽  
Full Width ◽  
Half Maximum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Annealing Conditions ◽  
Electrical Degradation ◽  
Zno Varistors ◽  
Triple Points

The effects of the thermally annealing of Bi-Mn-Co-Sb2O3-added ZnO varistors on their electrical degradation were investigated. For the samples with 0.01mol% Sb2O3added and without Sb2O3, no marked difference in the non linearity index of the voltage-current (V-I) characteristics was observed upon electrical degradation for the annealed and nonannealed samples. Upon increasing the amount of Sb2O3 added, the values of  increased after electrical degradation for the annealed samples. Moreover, the value of  after electrical degradation was proportional to the full width at half maximum (FWHM) of the X-ray diffraction peak for Zn2.33Sb0.67O4-type spinel particles under various annealing conditions. The added Sb2O3 did not dissolve in the ZnO grains but became segregated at grain boundaries. Therefore, it is speculated that the increase in the FWHM for the spinel particles is due to the increase in the numbers of fine spinel particles at grain boundaries and triple points.

Superconducting Compound Hg0.8Sb0.2Ba2Ca2Cu3O8+δ Compared with Hg0.8Sb0.2Ba2Ca1Cu2O6+δ to Evaluate Transition Temperature

2020 ◽  
Vol 18 (11) ◽  
pp. 14-18
Author(s):  
Abbas K. Saadon ◽  
Kareem A. Jasim ◽  
Auday H. Shaban
Keyword(s):  
High Temperature ◽  
Transition Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Hot Spot ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Superconducting Compound

The high temperature superconductor’s compounds are one of the hot spot field of science, due to their applications in industries. Hg0.8Sb0.2Ba2Ca2Cu3O8+δ and Hg0.8Sb0.2Ba2Ca1Cu2O6+δ, were manufactured using a doable-step of solid state reaction method. The samples were sintered at 800 ° C. The transition temperatures Tc are found from electrically resistively by using four probe techniques. The resistivity become zero when the transition temperature Tc(offset) have 131 and 119 K, and the onset temperature Tc(onset) have 139 K for Hg0.8Sb0.2Ba2Ca2Cu3O8+δ and 132 K for Hg0.8Sb0.2Ba2Ca1Cu2O6+δ. Analysis of X-ray diffraction showed a tetragonal structure with lattice parameters changes for all samples.

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