Infrared Spectra of the Alkali Metal Cyanides in the Solid State

1973 ◽  
Vol 27 (2) ◽  
pp. 93-94 ◽  
Author(s):  
Zakya K. Ismail ◽  
Robert H. Hauge ◽  
John L. Margrave
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Liquid Nitrogen ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Solid Phase ◽  
Liquid Nitrogen Temperature ◽  
Metal Cyanides ◽  
Sodium And Potassium

The infrared spectra of lithium isocyanide and of sodium and potassium cyanides in the solid phase were examined over the range 4000 to 140 cm−1 at room temperature. A study of the effect of cooling the solids to liquid nitrogen temperature has been carried out.

Correlation of Mössbauer Quadrupole Splitting (ΔΕQ) and Infrared Cyanide Frequency Separation in Alkali Metal Ferricyanides

1975 ◽  
Vol 30 (1-2) ◽  
pp. 96-98 ◽  
Author(s):  
A. N. Garg
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Quadrupole Splitting ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Frequency Separation ◽  
Hydrogen Atoms ◽  
Stretching Vibrations ◽  
Hydrogen Bonded

Mössbauer and infrared spectra of the alkali metal ferricyanides M3I [Fe(CN)6] · nH2O, where MI = H, Li and Na were studied at room temperature. All the three compounds displayed a doublet with small quadrupole splitting (ΔΕQ). Infrared spectra of these compounds in solid state gave two frequencies for C=N stretching vibrations with their separation (Δv) in increasing order which was found to be linearly correlated with ΔE Q. A plausible explanation has been given in terms of the interaction of Li+ and Na+ cations with the CN- ligands of octahedrally symmetric ferricyanide anion [Fe(CN)6]3- similar to that of hydrogen atoms which are hydrogen bonded in H3Fe(CN)6.

Structural characterization of damage in Si(100) produced by MeV Si+ ion implantation and annealing

1990 ◽  
Vol 5 (2) ◽  
pp. 352-359 ◽  
Author(s):  
M. K. El-Ghor ◽  
O. W. Holland ◽  
C. W. White ◽  
S. J. Pennycook
Keyword(s):  
Epitaxial Growth ◽  
Liquid Nitrogen ◽  
Room Temperature ◽  
Solid Phase ◽  
Liquid Nitrogen Temperature ◽  
Interfacial Region ◽  
Layer By Layer ◽  
Extended Defects ◽  
Lower Growth ◽  
Wide Region

Buried amorphous layers were produced by implantation of MeV Si+ ions in silicon single crystal at room temperature and liquid nitrogen temperature. The damage is characterized structurally both in the as-implanted condition and after post-implantation furnace annealing. Growth of the amorphous layer during room temperature implantation is found to occur by a layer-by-layer mechanism with relatively sharp interfacial transition regions. A wide region ahead of the buried amorphous region extending to the surface is observed to be free of any extended defects. Recrystallization of the damaged region during thermal annealing occurs by solid-phase epitaxial growth at both interfaces. A lower growth velocity is found at the upper interface, which is attributed to a higher hairpin dislocation density grown-in at this interface. Results of irradiation at liquid nitrogen temperature, on the other hand, show that nucleation and growth of the amorphous damage occurs over a wide region and is not confined to the interfacial region. This results in a very diffuse upper interface composed of a mixture of amorphous and crystalline phases. Substantial reordering is observed in this mixed-phase region after 400°C annealing, even though this temperature is too low for normal interfacial solid-phase epitaxial growth. Cross-sectional transmission electron microscopy, as well as Rutherford backscattering spectroscopy, were used in this study.

scholarly journals Ion Implantation and Annealing of Oxides

1986 ◽  
Vol 74 ◽  
Author(s):  
C. W. White ◽  
L. A. Boatner ◽  
P. S. Sklad ◽  
C. J. Mchargue ◽  
S. J. Pennycook ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Liquid Nitrogen ◽  
Amorphous Phase ◽  
Room Temperature ◽  
Solid Phase ◽  
Liquid Nitrogen Temperature ◽  
Pure Material ◽  
Near Surface ◽  
Implantation Damage ◽  
Crystalline Oxides

AbstractIon implantation damage and annealing results are presented for a number of crystalline oxides. In A12 O3, the amorphous phase produced by ion bombardment of the pure material first crystallizes in the (crystalline) γ phase. This is followed by the transformation of γ-Al2 O3 to α-A12O3 at a well defined interface. The activation energy for the growth of α alumina from γ is 3.6 eV/atom. In CaTiO3, the implantation-induced amorphous phase transforms to the crystalline phase by solid-phase epitaxy (SPE). ZnO is observed to remain crystalline even after high implantation doses at liquid nitrogen temperatures. The near surface of KTaO3 is transformed to a polycrystalline state after implantation at room temperature or liquid nitrogen temperature.

Cryogenic Interlaminar Properties of PBO Fiber/Epoxy Composites

2011 ◽  
Vol 391-392 ◽  
pp. 1445-1449
Author(s):  
Chun Hua Zhang ◽  
Shi Lin Luan ◽  
Xiu Song Qian ◽  
Bao Hua Sun ◽  
Wen Sheng Zhang
Keyword(s):  
Liquid Nitrogen ◽  
Room Temperature ◽  
Liquid Nitrogen Temperature ◽  
Epoxy Composites ◽  
Bending Test ◽  
Test Results ◽  
Sem Images ◽  
Three Point Bending ◽  
Pbo Fiber ◽  
Interlaminar Shear

The influences of low temperature on the interlaminar properties for PBO fiber/epoxy composites have been studied at liquid nitrogen temperature (77 K) in terms of three point bending test. Results showed that the interlaminar shear strength at 77 K were significantly higher than those at room temperature (RT). For the analysis of the test results, the tensile behaviors of epoxy resin at both room temperature and liquid nitrogen temperature were investigated. The interface between fiber and matrix was observed using SEM images.

Solid-state mechanical alloying of plastic crystals

1997 ◽  
Vol 12 (12) ◽  
pp. 3254-3259 ◽  
Author(s):  
J. Font ◽  
J. Muntasell ◽  
E. Cesari ◽  
J. Pons
Keyword(s):  
Solid State ◽  
Binary System ◽  
Mechanical Alloying ◽  
Ball Milling ◽  
Room Temperature ◽  
Binary Systems ◽  
Solid Phase ◽  
Stable State ◽  
Plastic Crystals ◽  
Dsc Measurements

Ball milling has been used as a solid-state mechanical alloying technique in two binary systems of plastic crystals: neopentylglycol/pentaglycerin (NPG/PG), showing a partial solubility in the ordered phase, and 2-amino-2-methyl-1,3-propanediol/tris(hydroxymethyl) (AMP/TRIS) whose immiscibility in this ordered solid phase is almost total. For the AMP/TRIS system the stable state at room temperature was reached by milling. Contrarily, for NPG/PG, DSC measurements reveal that an annealing period is required after milling. These results have been compared with those of the pentaglycerin/pentaerythritol (PG/PE) binary system, previously studied, whose miscibility is total at room temperature.

Research on DC Breakdown and Flashover Characteristics of PI with Different Temperature

2016 ◽  
Vol 709 ◽  
pp. 11-14
Author(s):  
Tian Ye Niu ◽  
Jia Xin Wu ◽  
Ying Wen Li ◽  
Dong Sheng Xu ◽  
Lu Li ◽  
...  
Keyword(s):  
Liquid Nitrogen ◽  
Room Temperature ◽  
Rapid Development ◽  
Liquid Nitrogen Temperature ◽  
Power Equipment ◽  
Electrical Characteristics ◽  
Cryogenic Temperatures ◽  
Insulating Materials ◽  
Dielectric Performance ◽  
Working Performance

The electrical characteristics of insulating materials play a key role on the working performance and operation reliability of power equipment. With the rapid development of superconducting technology in recent years,the working temperature of high temperature superconducting power equipment can be controlled around the liquid nitrogen temperature. Due to its excellent dielectric performance and mechanical properties, polyimide have been widely used in power equipment at room temperature. However, polyimide, as a kind of cryogenic insulating materials, is rarely reported at present. Therefore, the study of the insulating characteristics of polyimide at the cryogenic temperatures is of great significance. The DC breakdown property and flashover performance of polyimide are tested around room temperature (300K) and liquid nitrogen temperature (78K). The results show that temperature has some effects on the DC breakdown property and flashover performance of polyimide.

Application of interference fits on cylindrical monochromator crystals to overcome clamping and cooling deformations

2019 ◽  
Vol 26 (2) ◽  
pp. 382-385
Author(s):  
Joshua Stimson ◽  
Michael Ward ◽  
John Sutter ◽  
Sofia Diaz-Moreno ◽  
Simon Alcock ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Liquid Nitrogen ◽  
Room Temperature ◽  
Silicon Crystal ◽  
Liquid Nitrogen Temperature ◽  
Cryogenic Cooling ◽  
Element Analysis ◽  
Thermal Interface ◽  
Macro Scale ◽  
Order Of Magnitude

In order to provide adequate cryogenic cooling of both existing and next-generation crystal monochromators, a new approach to produce an optimum thermal interface between the first crystal and its copper heat exchanger is proposed. This will ensure that the increased heat load deposited by higher X-ray powers can be properly dissipated. Utilizing a cylindrical silicon crystal, a tubular copper heat exchanger and by exploiting the differing thermal and mechanical properties of the two, a very good thermal interface was achieved at liquid-nitrogen temperatures. The surface flatness of the diffracting plane at one end of the cylindrical crystal was measured at room temperature while unconstrained. The crystal was then placed into the copper heat exchanger, a slide fit at room temperature, and then cooled to liquid-nitrogen temperature. At −200°C the slide fit became an interference fit. This room-temperature `loose' fit was modelled using finite-element analysis to obtain the desired fit at cryogenic temperatures by prescribing the fit at room temperature. Under these conditions, the diffraction surface was measured for distortion due to thermal and mechanical clamping forces. The total deformation was measured to be 30 nm, an order of magnitude improvement over deformation caused by cooling alone with the original side-clamped design this concept method is set to replace. This new methodology also has the advantage that it is repeatable and does not require macro-scale tools to acquire a nanometre-accuracy mounting.

Study of Electrical Properties of Ge-Nanocrystalline Films Deposited by Cluster-Beam Evaporation Technique

1998 ◽  
Vol 536 ◽  
Author(s):  
Souri Banedjee ◽  
H. Ono ◽  
S. Nozaki ◽  
H. Morisaki
Keyword(s):  
Electrical Properties ◽  
Liquid Nitrogen ◽  
Coulomb Blockade ◽  
Room Temperature ◽  
Liquid Nitrogen Temperature ◽  
Cluster Beam ◽  
Nanocrystalline Films ◽  
Current Voltage ◽  
Evaporation Technique

AbstractRoom temperature current-voltage (I-V) characteristics were studied across the thickness of the Ge nanocrystalline films, prepared by the cluster beam evaporation technique. The films thus prepared are deposited either at room temperature (Ge-RT) or at liquid nitrogen temperature (Ge-LNT). Ge-LNT nanofilm is subjected to oxidation while Ge-RT did not get oxidized. Steps were observed in the I-V characteristics of the thin Ge- LNT samples suggesting the Coulomb Blockade effect.

scholarly journals Solid-State Synthesis, Characterization, and Biological Activity of the Bioinorganic Complex of Aspartic Acid and Arsenic Triiodide

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Guo-Qing Zhong ◽  
Wen-Wei Zhong ◽  
Rong-Rong Jia ◽  
Yu-Qing Jia
Keyword(s):  
Crystal Structure ◽  
Biological Activity ◽  
Solid State ◽  
Complex Formation ◽  
Aspartic Acid ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Biological Test ◽  
Bridge Structure ◽  
Monoclinic System

The bioinorganic complex of aspartic acid and arsenic triiodide was synthesized by a solid-state reaction at room temperature. The formula of the complex is AsI3[HOOCCH2CH(NH2)COOH]2.5. The crystal structure of the complex belongs to monoclinic system with lattice parameters:a=1.0019 nm,b=1.5118 nm,c=2.1971 nm, andβ=100.28°. The infrared spectra can demonstrate the complex formation between the arsenic ion and aspartic acid, and the complex may be a dimer with bridge structure. The result of primary biological test indicates that the complex possesses better biological activity for the HL-60 cells of the leukemia than arsenic triiodide.

scholarly journals Lithium, sodium and potassium picolyl complexes: syntheses, structures and bonding

2014 ◽  
Vol 43 (38) ◽  
pp. 14265-14274 ◽  
Author(s):  
Alan R. Kennedy ◽  
Robert E. Mulvey ◽  
Robert I. Urquhart ◽  
Stuart D. Robertson
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Metal Anion ◽  
Sodium And Potassium

A series of alkali metal 2- and 4-picolyl (methylpyridyl) complexes have been prepared and their metal–anion bonding probed in the solid state and solution.

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