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Online since: May 2013
Authors: Li Min Dong, Zhong Li, Jin Bo Mi, Da Sun, Ping Li, Wei Li, Lian Wei Shan
The tetragonal scheelite peak completely disappeared, the comparison to the standard JCPDS card shows that resultant BiVO4 having a very pure monoclinic.
We can see from the figure: the absorption peaks the pure BiVO4 samples which calcined at 500°C for 4h are attributed to: in the wave number of 469.27cm-1 is the Bi-O bond absorption peak, in the wave number of 729.93cm-1 is V-O bond absorption peak.
The wave number of 1026.5cm-1 and 1097.14cm-1 is V = O double bond stretching vibration absorption peak, the wave number of 3431.29cm-1 and 1637.14cm-1 is respectively the broad of peak stretching vibration and bending vibration of O-H.
The absorption peaks of Ag2O loaded on BiVO4 sample which calcined at 500°C for 4h shows: in the wave number of 460.93cm-1 is the Bi-O bond absorption peak, the V-O bond absorption peak is at the wave number of 721.27cm-1, the wave number of 1100.46cm-1 is V = O double bond stretching vibration absorption peak, the wave number of 3432.35cm-1 and 1634.05cm-1 is O-H stretching vibration broad peak and the bending vibration.
Online since: November 2019
Authors: Raad Sh. Alnayli, Hanan Alkazaali
Materials and Methods 2.1 Physical properties of target (Ag) Silver is a chemical element with the chemical symbol Ag and atomic number 47.
Ethanol is a solvent that can be also mixed with a number of other organic solvents, including acetic acid, acetone…).
The liquid depth was 2mm, the number of laser shots applied for the metal target at (50,100,150) pulses.
Ag nanoparticle with polycrystalline structure was established by (JCPDS card No. 04-0783).
Show Figure (5-d) the extinction coefficient increases by increasing the number of laser pulses high values appear in the visible region.
Online since: August 2018
Authors: Hong Bo Zhang, Meng Jie Zhao, Chun Hui Su, Shuo Meng, Xiang Yu Zou, Qin Lei Wei
The samples of glass ceramics were cut into small pieces with the size of 10 mm ´ 10 mm ´ 3 mm and polished, the number and composition of samples show in Table 1.
The composition of Na2O-Y2O3-P2O5-SiO2 system glass sample (mol%) Sample number Na2CO3 Y2O3 SiO2 H3BO3 P2O5 Sb2O3 PG 15 3 45 31.4 5.4 0.2 Fig.1.
The Fourier transform infrared spectra of the samples were taken using a FTIR-8400S spectrometer in the wave number range of 1500–400 cm−l.
The main crystalline phase is Na3.6Y1.8(PO4)3 (47-0972) by comparing the XRD pattern with the JCPDS card.
FTIR bands position of the samples Sample number Peak position(cm-1) PG 457 707 1020 1250 1400 GC1 457 550 617 670 707 1020 1250 1400 GC2 457 550 617 670 707 1020 1250 1400 PC3 457 550 617 670 707 1020 1250 1400 Table 4.
Online since: November 2023
Authors: Edi Suharyadi, Nurul Imani Istiqomah, Daiki Oshima, Takeshi Kato, Siska Irma Budianti, Rivaldo Marsel Tumbelaka
Result and Discussion The observed diffraction peaks of the NiZnFe2O4 nanoparticles were observed in the range of 2θ: 26.2°,30°, 35.3°,42.7°, 53.4°, 56.8°, and 62.3°, corresponding to the (200), (311), (111), (422), (511), and (440) which show the cubic crystal structure according to JCPDS card No.08.0234.
The peaks of nanocrystalline TiO2 at values of 26.2° and 49.3° with corresponding plane indices of (110) and (200) with a tetragonal crystal structure which corresponds to JCPDS no. 21-1271.
Fr=the number of grains of the same sizethe total number of items measured×100 (2) Figure 3.
The IR spectra of the four samples have absorption peaks in wave numbers of 3410 and 3425 cm-1 and wave numbers at 1627.9 and 1636.6 cm-1 which with stretching mode for the O-H hydroxyl group on the nanocrystalline surface which creates molecular adsorption to the nanocrystalline surface [8,27].
However, after encapsulation, the wave number tends to shift to follow the smaller number, this indicates that it is between metal ions so that becomes weak [35].
Online since: February 2009
Authors: Umapada Pal, Mou Pal, R. Silva Gonzalez, E. Sanchez Mora, P. Santiago
Figure 5 shows the Sample Atomic % Ti O Yb Undoped TiO2 40.46 59.54 0 Yb 0.5 mol % 38.02 61.18 0.80 Yb 2 mol % 37.24 61.89 0.87 Yb 8 mol % 36.71 62.32 0.97 50 n Undop e d TiO 2 500 nm 200 nm TiO2:Yb (2%) 200 nm TiO2:Yb (2%) TiO2:Yb (8%) 200 nm 30 35 40 45 50 0 10 20 30 Particle size (nm) Number of particles φ = 40.6 nm σ = 2.9 nm TiO2 20 30 40 50 60 0 10 20 30 40 50 Particle size(nm) Number of particles 2 % Yb φ = 33 nm σ = 3.23 nm 20 25 30 35 40 0 10 20 30 40 50 Number of particles Particle size (nm) φ = 27.5 nm σ = 1.4 nm 8 % Yb C N O Ti Ti keV 0 10000 20000 30000 40000 50000 0 5 10 (a) C N O Ti Ti Yb Yb keV 0 10000 20000 30000 40000 50000 0 5 10 (b) Table 2.
When the particles of interest contains heavy elements, high-angle annular dark field scanning TEM (HAADF-STEM) is the right choice to determine their existence in the matrix, as the contrast of the HAADF image is strongly related with the atomic number of the elements [23].
Vol. 15 (2003), p. 1256 [20] Joint Comitee on Powder Diffraction Standard (JCPDS) cards No. 84-1286
Online since: April 2009
Authors: Vijaya Agarwala, Ramesh Chandra Agarwala, Rahul Sharma
For neutralization the number of moles of NaOH equals number of moles of Cl¯ ions.
Figures 3 (A and B) are showing the direct development of pure NRAM single phase hexagonal BaFe12O19 (JCPDS Card No. 84-757) hexaferrite during MWA and VA respectively.
It is observed that MWA is giving better RL characteristics than VA because the larger number of nano planes are interacting with EM wave.
At the same time, with the decrease of the particle size, the number of incomplete molecules and the defects of surface and interface increase rapidly, which will lead to the multiplication of discrete energy levels[20].
Online since: April 2021
Authors: S.M. Ali Ridha, S. Mahmood Hussein, T.H. Mubarak, Jasim Al-Zanganawee
Identification of crystalline compounds and phases had been accomplished by comparing the X-ray diffraction pattern of samples with JCPDS standard data.
Starting from x=0, it had noted the formation of single-phase MnFe2O4 and well-matched with the JCPDS card no-010-0319.
Most peaks are corresponding with JCPDS standard data for MnZn-ferrite as shown in Fig.2.
The force constant for A-sites are nearly equal to force constant for B-sites even as A- sites have four coordination number while B-sites have six coordination number [[] K.V.
The ionic radius of Mn2+ (0.66Å) replaced with Zn2+ (0.6Å) caused a shortening of the bond length, so the wave number increased.
Online since: November 2011
Authors: Zhi Qiang Hua, Lei Wang, Tao Li, Xue Tao Yuan, Xu Dong Lv, Yun Yi Wu
All the peaks are indexed by JCPDS card of BTO (No.12-0213).
Therefore, V doping had the advantage of decreasing the number of, as has been found in Nb5+-doped materials [14, 15].
Therefore, we preliminarily attributed the low leakage current density in the BLTV ceramic to the decreased number of and conductive charge by La3+ and V5+ co-doping.
In addition, La3+ substitution on Bi3+ would enhance stability of the perovskite block, which helps to minimize Bi ions volatilization and reduce the number of defect dipoles.
These improvements in ferroelectric properties in BLTV ceramics could be contributed to be possible decreasing number of oxygen vacancies induced by the co-doping of La3+ at the A site and V5+ at the B site.
Online since: November 2023
Authors: Emad S. Al-Hassani, Jawad K. Oleiwi, Alaa A. Mohammed
Introduction The number of patients with dentition problem or loss is increasing annually as a result of the rise in the aging people.
The antibacterial effect was calculated using: %R=(B-C)B*100 (1) Where R is the antibacterial effect, B is the mean number of bacteria on the control specimen (CFU/specimen), and C is the mean number of bacteria on the composites (CFU/specimen) [14]. 2.6 Statistical Analysis The obtained reults was statisiticaly analysis by (SPSS 22 ) softwer with utilized one-way ANOVA.
Two common and wide diffraction peaks of hydroxyapatite are slightly observed around, situated at 2θ=18°and 25° which are appointed at (110), (002) according to the standard JCPDS cards (09-0432).
As the immersion duration increases, the number and the intensity of diffraction peaks of hydroxyapatite increase and the specimens of the PEEK substrate decrease.
Moreover, the number of cells is increased with incubation time indicating that the surface of the composites provides good environment for cell growth.
Online since: May 2012
Authors: S. Nasir, M. Akram, G. Asghar, Muhammad Anis-ur-Rehman
Relative number of the under-coordinated atoms those lies at the surface provides a tool to tune the properties of a nanosolids.
Drift mobility (µd) of all the samples has been calculated using the relation, µd =1/neρ (4) Where e is the charge of electron, ρ the electrical resistivity at a particular temperature and n is the concentration of charge carrier, which can be calculated from the relation, n = Na ρm PFe/M (5) where M is the molecular weight, Na the Avogadro's number, ρm the measured density of sample and PFe is the number of iron atom in the chemical formula of the ferrites.
XRD patterns of Co1-xMnxFe2O4 (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0) The peaks corresponding to * belongs to Fe2O3 phase The XRD patterns were indexed using the JCPDS card numbers 22-1086 and 74-2403.
Further, as the frequency of the externally applied electric field increases gradually, and though the same number of ferrous ions is present in the ferrite material, the dielectric constant decreases.