X-ray investigation of Ti-Si thin films prepared by solid phase reaction

In this paper we are reported about a peculiarity of the crystal structure and the magnetic state of TmFeTi2O7. The compound TmFeTi2O7 has been synthesizedusing the solid-phase reaction method. Using X-ray diffraction method the disorder in the distribution of the iron ions over five nonequivalent crystal sites was observed, also the populations of the iron atoms positions were determined. We show that below Tf = 6 K the magnetization of TmFeTi2O7 depends on the magnetic history of the sample. There are indications for spin glass state. This results allow us to assume the state of spin glass is realized below freezing temperature Tf = 6 K in TmFeTi2O7.

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Effect of Sintering Temperatures and Ba/Ti Ratio on Dielectric Properties of BaTiO3 Ceramic

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.506 ◽

2013 ◽

Vol 750-752 ◽

pp. 506-511

Author(s):

Yuan Yuan Li ◽

Gui Xia Dong ◽

Bi Yan Zhu ◽

Qiu Xiang Liu ◽

Di Wu

Keyword(s):

Crystal Structure ◽

Dielectric Properties ◽

Curie Temperature ◽

Sintering Temperature ◽

Solid Phase ◽

Solid Phase Reaction ◽

Phase Reaction ◽

X Ray Diffraction ◽

X Ray ◽

Method Effect

As a research object, the samples with various Ba/Ti ratios (Ba/Ti=0.95~1.05) were synthesized by solid phase reaction method. Effect of sintering temperatures and Ba/Ti ratio on dielectric properties and crystal structure of BaTiO3ceramic were investigated. Crystal structure and crystal phase composition were investigated by scanning electron microscopy and X-ray diffraction. The dielectric properties were studied by Agilent 4294A at 1 kHz. The results show that the BaTiO3ceramic has high permittivity and dielectric loss at 1340°C. The permittivity of BaTiO3ceramic with Ba/Ti=0.95 change small as the sintering temperatures vary at 1320°C. With the increasing of Ba/Ti ratio, the Curie temperature first increases and then decreases as the sample sintering at 1320°C. When Ba/Ti=1, the Curie temperature increase with the sintering temperature increasing.

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Synthesis and Ionic Conductivity of MAlSi3O8 (M = Li, Na, K)

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.790.9 ◽

2018 ◽

Vol 790 ◽

pp. 9-14

Author(s):

Shin Ichi Furusawa ◽

Yohei Minami

Keyword(s):

Activation Energy ◽

Ionic Conductivity ◽

Ionic Radius ◽

Ionic Conduction ◽

Solid Phase ◽

Solid Phase Reaction ◽

Phase Reaction ◽

X Ray Diffraction ◽

Crystalline Phases ◽

X Ray

MAlSi3O8 (M = Li, Na, K) was synthesized by solid-phase reaction at 1000 °C using M2CO3 (M = Li, Na, K), Al2O3, and SiO2 as the starting materials, and its ionic conduction was studied in the temperature range 475–800 K. It was confirmed from powder X-ray diffraction profiles that the crystalline phases of the prepared MAlSi3O8 were the same as those of orthoclase. Moreover, the ionic conductivity of NaAlSi3O8 was about 10 times higher than that of LiAlSi3O8 and KAlSi3O8. The activation energies for ionic conduction were estimated to be in the range of 0.70–0.77 eV, with NaAlSi3O8 exhibiting the lowest activation energy. The result suggests that the magnitude of the activation energy cannot be determined only from the ionic radius.

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Solid-Phase Reaction of Tungsten Thin Films with Polycrystalline Diamond

MRS Proceedings ◽

10.1557/proc-339-247 ◽

1994 ◽

Vol 339 ◽

Cited By ~ 3

Author(s):

A. Bachli ◽

J. S. Chen ◽

R. P. Ruiz ◽

M-A. Nicolet

Keyword(s):

Solid Phase ◽

Polycrystalline Diamond ◽

Solid Phase Reaction ◽

Phase Reaction ◽

X Ray Diffraction ◽

Final State ◽

Thermally Induced ◽

X Ray ◽

Sputter Deposited ◽

Scanning Electron

ABSTRACTThe thermally induced solid-phase reaction of 135 nm thick sputter-deposited W films with polycrystalline CVD-grown diamond substrates is investigated. The samples are annealed in vacuum (5×10/-7 torr) at temperatures between 700 °C and 1100 °C for 1 hour and examined by 2 MeV 4He++ backscattering spectrometry, x-ray diffraction, and scanning electron microscopy.The as-deposited W films contain roughly 5 at.% oxygen. After annealing the samples at 800 °C this oxygen concentration falls below the detection limit of less than 1 %. Incipient W2C phase formation occurs during annealing at 900 °C. The final state, the WC phase, is reached after annealing at 1100 °C.

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Synthesis and Ionic Conductivity of KAlSi3O8

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.698.8 ◽

2016 ◽

Vol 698 ◽

pp. 8-12 ◽

Cited By ~ 1

Author(s):

Shinichi Furusawa ◽

Yohei Minami

Keyword(s):

Electrical Conductivity ◽

Ionic Conductivity ◽

Sintering Temperature ◽

Solid Phase ◽

Ionic Transport ◽

Solid Phase Reaction ◽

Phase Reaction ◽

X Ray Diffraction ◽

Diffraction Profile ◽

X Ray

In this study, KAlSi3O8 was synthesized by a solid-phase reaction at 900, 1000 and 1100 °C, using K2CO3, Al2O3 and SiO2 as the starting materials. The powder X-ray diffraction profile of the compound thus prepared was confirmed to contain a mixture of crystalline and glass phases. In addition, a higher sintering temperature of greater than 1000 °C possibly led to the decrease in the crystalline phase. From the temperature dependence of dc conductivity, activation energies for ionic transport were estimated to be 0.79–0.84 eV. The frequency-dependence of the real part of electrical conductivity suggests that the mechanism of ionic transport in the dispersion region possibly depends on the crystallinity of KAlSi3O8.

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Needle-Like Mullite Ceramic Prepared by Sol-Gel Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.2640 ◽

2011 ◽

Vol 233-235 ◽

pp. 2640-2643 ◽

Cited By ~ 3

Author(s):

Fu Sheng Song

Keyword(s):

Powder Diffraction ◽

Solid Phase ◽

Raw Materials ◽

Sol Gel ◽

Solid Phase Reaction ◽

Phase Reaction ◽

Mullite Ceramic ◽

X Ray ◽

Sol Gel Process ◽

Ceramic Blocks

Using tetraethoxysilane, aluminum nitrate and aluminum fluoride as raw materials, the precursor of mullite was prepared by sol-gel process. When the precursor sintered at 1200°C, mullite ceramic was obtained. Differential thermal analysis, X-ray powder diffraction and scanning electron microscope were used to characterize the dried mullite gel and ceramic blocks. The results suggest mullite is synthesized by solid-phase reaction mechanism. X-ray powder diffraction indicates mullite is the main crystals phase in the ceramic specimen. SEM micrograph shows the mullite grains in the shape of short rod with length of 20 um when sintered at 1200 °C for 2 h and the grains grown up to acicular with length of more than 50 um when the treating time under 1200 °C achieved to 4 h.

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Synthesis and X-ray analysis of complex ferrite YbBiNaFe2O6,5

Chemical Bulletin of Kazakh National University ◽

10.15328/cb805 ◽

2017 ◽

pp. 14-17

Author(s):

Muhkametkali Mataev ◽

Moldir Abdraimova ◽

A. Atabay

Keyword(s):

Crystal Lattice ◽

Solid Phase ◽

Oxide Phase ◽

Fluorite Structure ◽

Solid Phase Reaction ◽

Phase Reaction ◽

X Ray Diffraction ◽

X Ray ◽

Cell Parameters ◽

Mixed Ferrite

The complex oxide phase of the composition YbBiNaFe2O6,5 was synthesized by the high-temperature solid-phase reaction. X-ray diffraction analysis was used to study the structure for the first time; the type of syngony, unit cell parameters, X-ray diffraction and pycnometric densities were determined. X-ray diffraction was carried out by homology method from the initial fluorite structure δBi2O3. The method of least squares refined the parameters of the crystal lattice. The parameters of the orthorhombic lattice of complex mixed ferrite at the value of the number of formula units Z=4 are: a=5.2319, в=5.2186, с=7.5702 Å. The correctness of the results of the X-ray diffraction of complex mixed ferrite was confirmed by the good agreement between the experimental and calculated values of the inverse squares of the interplanar distances (104/d2). Satisfactory consistency of the values of the X-ray and pycnometric densities, ρrad = 8.335, ρpik = 8.328 g/cm3, proves the correctness of the results of the experiment. A comparative analysis of the interrelation between the parameters of the crystal lattice and the parameters of the crystal lattices of the initial oxide δBi2O3. The analysis shows the values of the parameters “a” and “c” are in satisfactory agreement with the parameters of the crystal lattice δBi2O3, the parameter “c” is distorted from the value of the parameter “a” on √2.

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Структурные фазовые превращения при твердофазной реакции в тонких двухслойных пленках Al/Pt

Физика твердого тела ◽

10.21883/ftt.2018.07.46130.352 ◽

2018 ◽

Vol 60 (7) ◽

pp. 1397

Author(s):

Р.Р. Алтунин ◽

Е.Т. Моисеенко ◽

С.М. Жарков

Keyword(s):

Thin Films ◽

Electron Diffraction ◽

Phase Transformations ◽

Solid Phase ◽

Structural Phase ◽

Solid Phase Reaction ◽

Phase Reaction ◽

Formation Heat ◽

Structural Phase Transformations

AbstractA sequence of phases forming during the solid-phase reaction in Al/Pt bilayer thin films has been investigated by in situ electron diffraction. It is shown that the amorphous PtAl_2 phase forms first during the solid-phase reaction initiated by heating. Upon further heating, PtAl_2, Pt_2Al_3, PtAl, and Pt_3Al crystalline phases sequentially form, which is qualitatively consistent with an effective formation heat model. The content of phases forming during the reaction has been quantitatively analyzed and the structural phase transformations have been examined.

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