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Online since: December 2012
Authors: Xin Xin Ma, Guang Ze Tang, Le Van Khoa Bao
For samples sintered at 900 °C (Fig. 1a), it is clearly seen that the perovskite structures are predominant in all samples, and the pure phases present in the samples with x of 0.2 and 0.3, while the others appear the impurity phase Sr2MnO4 (PDF #74-0882).
The single phases of all samples are observed as sintering temperature reaches to 1200 °C (Fig. 1d), indicating all Sr ions completely substituted into LaMnO3 forming a pure LSMO perovskite structure.
Furthermore, some diffraction peaks of the samples with x = 0.2, 0.3 and 0.33 split into well-resolved peaks indicates the rhombohedral structure, while those of the samples with x ³ 0.35 overlap into single peaks that suggests the cubic one.
Kakihana, Chemistry and Applications of Polymeric Gel Precursors, in: H.
Li, Size dependence of structure and magnetic properties of La0.7Sr0.3MnO3 nanoparticles, Physica B: Condensed Matter, 355 (2005) 250-254
Online since: June 2011
Authors: Heng Qiang Ye, Shao Qing Wang, Lin Zhang, Yong Li Liu, Jian Zhi Bao
For Ti3Al region near the interface, the final structure is the continued FCC stacking.
This may indicates that they experience the structure transformation in step.
It can be seen that the TiAl region keep the similar structure with that of 19500 t0.
The finally transformed structure is in accordance with the experimental observation
The final transformed structure meets agreement with the experimental observation.
Online since: May 2013
Authors: A.S.B. Sombra, E.J.J. Mallmann, J.C. Goes, P.B.A. Fechine
The material has bcc cubic structures with 8 formula units and three sublattices.
YIG crystal structure has cubic symmetry and belongs to the space group Oh10 – [7].
Factor group analysis of the R3Fe5O12 (R = Y e Gd) structure [22].
Robinson, Teaching General Chemistry: A Materials Science Companion, Am.
Encyclopedia of inorganic chemistry, John Wiley & Sons, Chichester, 1994, pp. 2362-2382
Online since: June 2015
Authors: Sami H. Mahmood, Aynour N. Aloqaily, Yazan Maswadeh, Ahmad Awadallah, Ibrahim Bsoul, Mufeed Awawdeh, Hassan Juwhari
It has a hexagonal structure with typical lattice parameters a = b = 5.88 Å and c = 23.2 Å [1].
The thermomagnetic curve of the sample with x = 0.2 sintered at 1200° C shows far more rich structure as indicated by Fig. 18.
Alam, Structural, magnetic and microwave absorption characteristics of BaCoxMnxTi2xFe12-4xO19, Materials Chemistry and Physics 113 (2009) 717 – 720
Jefferson, A study of magnetoplumbite-type (M-type) cobalt-titanium substituted barium ferrite, BaCoxTixFe12-2xO19 (x = 1 – 6), Materials Chemistry and Physics 105 (2007) 253 – 259
Papánová, Magnetic structure of Sn2+Ru4+ -substituted barium hexaferrites prepared by mechanical alloying, Materials letters 59 (2005) 1815_1819
Online since: July 2017
Authors: Elvis K. Tiburu, Edmund O. Aidoo, Ali Salifu, Heidimarie N.A. Fleischer, Gloria Manu, Abu Yaya, Han Zhou, Johnson K. Efavi
The biological activity of the zeolite/chitosan nanocomposite was investigated on HeLa cervical cancer cell lines to correlate material surface chemistry to cell viability.
The skeletal structures were seen beneath the contaminants (Fig. 2A).
First we displayed the structure of the chitosan skeleton (Fig. 5A).
The XRD analysis of chitosan confirmed an amorphous structure with two broad peaks (Fig. 5C).
(A) Figure 5: (A) The structure of the monomer of deacetylated chitin is displayed.
Online since: June 2022
Authors: Yunita Aprilia, Luthfi Mursid Darmawan, Afifah Nur Chairinnisa, Agus Purwanto
As a result, Ni(OH)2 sample formed has the same structure as β-Ni(OH)2 XRD patterns.
One of the parameters that showed the success of Al2O3 synthesis was the formation of the Al2O3 cube structure with diffraction peaks of 2θ and hkl fields that correspond to the standard reference of the Al2O3 crystal structure shown in Fig. 2.
Thus, Al doping to improve the crystal structure of LiNiO2 is influenced by the amount of aluminum.
The LNO structure with good characteristics can facilitate the lithium-ion transfer process.
Kalaiselvi, Various aspects of LiNiO2 chemistry: A review, Sci.
Online since: December 2011
Authors: Yong Jie Wang
The structure of pillared clays depends on the amount of hydration water.
Unlike the rigid network structure of zeolites, the hydration anions are quite mobile in pillared clays.
Acknowledgment We would like to thank the Laboratory of Catalytic Chemistry, Dalian Institute of Chemical Physics, the Chinese Academy of Sciences for financial support.
Online since: January 2012
Authors: Yan Mei Yang, Shi Qiang Wei
The term building includes various forms and uses of buildings and structures.
At the tempreture conditions of 300 ℃ the chemical bonding and physical chemistry between the interface of aggregate and cement is further enhanced as it is shows higher physical and mechanical properties.
Sludge can also be used for the pavement structure where there is no impact ecologically from cement burn.
Online since: July 2011
Authors: Heather J. Sharpe, Ashok Saxena
These alloys represent various advances in mechanical properties and ease of production or machining based on changes in chemistry or microstructure from previous generations of superalloys.
Both show a distinct tendency to form a pseudo-dendritic structure by preferential growth on the corners of the cubic precipitates.
Instead, the spherical particles seem to form a still spherical lobed structure.
Online since: May 2012
Authors: Pen Jin, Shou Kun Cao, Bao Xia Li
The reason for the single sharp peak forming is that the EPS has a simple structure and the process of EPS pyrolysis can be equal with polystyrene.
Conclusion From the TG and DTG analyses of biomass (bagasse, peanut shell, corncob), EPS and their blends, we may draw the following conclusions: (1) The EPS and biomass have the different molecular structure and characteristics of the reaction, while they have the alike temperature intervals of pyrolysis.
Varhegyi: Industrial & Engineering Chemistry Research, 1999, 36(6): 2238-2244