scholarly journals Corrected Nordheim's Rule in high concentration Al-Mg solid solution.

1998 ◽  
Vol 48 (6) ◽  
pp. 294-298 ◽  
Author(s):  
Shin-ya KOMATSU ◽  
Masahiko IKEDA ◽  
Tomohiro KOHMOTO ◽  
Yoshiaki TABATA ◽  
Takahiro TANIMOTO
Keyword(s):  
Solid Solution ◽  
High Concentration

A THEORETICAL INTERPRETATION FOR THE EXCITATION ENERGY TRANSFER BETWEEN IDENTICAL MOLECULES IN LIQUID AND SOLID SOLUTION OF HIGH CONCENTRATION

1996 ◽  
Vol 10 (08) ◽  
pp. 347-352
Author(s):  
A.L. PHILIPPETIS
Keyword(s):  
Solid Solution ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Solid Solutions ◽  
Excitation Energy Transfer ◽  
Experimental Results ◽  
Theoretical Interpretation ◽  
Coupling Constant ◽  
High Concentration ◽  
Migration Of Energy

In this work we refer to some experimental results related. as we believe, with excitation energy transfer between molecules of the same kind in liquid and solid solutions of high concentration. We try to explain these results by a theoretical interpretation based on the assumption that the “migration of energy” depends on the distance between the molecules, the orientation of these molecules and on a coupling constant related with the type of these molecules.

scholarly journals High Eu3+ concentration quenching in Y3TaO7 solid solution for orange-reddish emission in photonics

RSC Advances ◽  
2020 ◽  
Vol 10 (29) ◽  
pp. 16917-16927
Author(s):  
Fernanda Hediger Borges ◽  
Fábio José Caixeta ◽  
Rafael Ramiro Pereira ◽  
Silvana Ruella de Oliveira ◽  
Rute A. S. Ferreira ◽  
...  
Keyword(s):  
Solid Solution ◽  
Crystallization Process ◽  
Concentration Quenching ◽  
Color Purity ◽  
High Concentration

Eu3+ ions influence on the crystallization process of Y3TaO7 solid solution and this particular host has presented a high concentration quenching (30 mol%), displaying an intense orange-reddish emission, with color purity over 92.6%.

Defect Structure in (Zn,Mg)O Films Prepared on YSZ Substrate

2006 ◽  
Vol 320 ◽  
pp. 103-106 ◽  
Author(s):  
Haruki Ryoken ◽  
Isao Sakaguchi ◽  
Naoki Ohashi ◽  
Yutaka Adachi ◽  
Takeshi Ohgaki ◽  
...  
Keyword(s):  
Solid Solution ◽  
Thermal Treatment ◽  
Equilibrium State ◽  
Pulsed Laser Deposition ◽  
Defect Structure ◽  
Pulsed Laser ◽  
Solubility Limit ◽  
Laser Deposition ◽  
High Concentration ◽  
Non Equilibrium

The defect structure of undoped ZnO and (Zn1-x,Mgx)O solid-solution films were deposited on YSZ substrate with pulsed laser deposition (PLD) to investigate defect equilibria in those films. In particular, the effects of thermal treatment on the structures and prosperities of (Zn1-x,Mgx)O solid-solution films were examined. The films with high MgO concentration (x>0.12) decomposed to the wurtzite-type and rock-salt-type phase after thermal treatment, indicating that the solubility limit of Mg was about x=0.12 and the wurtzite-type (Zn,Mg)O films with x>0.12 were indicated to be non-equilibrium ones. The subsequent analyses of oxygen diffusivity in those films revealed that the films under non-equilibrium state, i.e., wurtzite-type (Zn1-x,Mgx)O with x>0.12, contained significantly high concentration of anion defects.

scholarly journals Composition and temperature dependences of resistivity of high concentration Mg-Al binary solid solution.

1995 ◽  
Vol 45 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Shin-ya KOMATSU ◽  
Masahiko IKEDA ◽  
Toshihiko IKOMA ◽  
Takeshi USUNAGA ◽  
Toshihiko SHINYA ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Concentration ◽  
Binary Solid Solution ◽  
Temperature Dependences

PHASE TRANSITION, DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF NaNbO3–Ba0.85Ca0.15(Ti0.9Zr0.1)O3 LEAD-FREE CERAMICS

2012 ◽  
Vol 05 (03) ◽  
pp. 1250033 ◽  
Author(s):  
YUQING LEI ◽  
HONG WU ◽  
DUNMIN LIN ◽  
QIAOJI ZHENG ◽  
XIAOCHUN WU ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid Solution ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
High Concentration ◽  
Lead Free Ceramics ◽  
Sintering Method ◽  
Dielectric And Piezoelectric Properties

A new lead-free solid solution of (1–x) NaNbO 3-x Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3 was prepared by a traditional sintering method and its phase transition, dielectric and piezoelectric properties were studied. Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3 diffuses into NaNbO3 lattices to form a new solid solution with perovskite structure. The addition of Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3(x≥0.025) transforms NaNbO3 from antiferroelectric to ferroelectric. The diffusive ferroelectric–paraelectric phase transition is induced in the ceramics with high concentration of Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3. The ceramics with x = 0.05–0.125 possess large Pr values of 18.6–25.5 μC/cm2. A morphotropic phase boundary between tetragonal and orthorhombic phases is formed at 0.05 < x < 0.15, leading to a significant enhancement of piezoelectric properties. The ceramic with x = 0.125 situated near the morphotropic phase boundary exhibits the optimum piezoelectric properties: d33 = 151 pC/N and kp = 31.6%.

scholarly journals Термоэлектрические свойства твердого раствора n-Mg-=SUB=-2-=/SUB=-(SiGe)-=SUB=-0.8-=/SUB=-Sn-=SUB=-0.2-=/SUB=-

2019 ◽  
Vol 53 (5) ◽  
pp. 612
Author(s):  
Г.Н. Исаченко ◽  
А.Ю. Самунин ◽  
П.П. Константинов ◽  
А.А. Касьянов ◽  
А. Масалимов
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Solid Solutions ◽  
Figure Of Merit ◽  
Magnesium Silicide ◽  
Thermoelectric Figure Of Merit ◽  
High Concentration ◽  
Thermoelectric Figure ◽  
Lower Figure ◽  
Temperature Dependences

AbstractHigh values of the thermoelectric figure of merit ( ZT = 1.5) in Mg_2Si–Mg_2Sn solid solutions are caused by a low thermal conductivity and a complex band structure, which is optimal at the ratio of solid-solution components of 40% Mg_2Si and 60% Mg_2Sn. However, the presence of magnesium stannide in a high concentration impairs the mechanical properties and chemical stability of the material limiting its application at high temperatures. Magnesium silicide has a higher stability but a lower figure of merit. The figure of merit is much lower in Mg_2Si-rich solid solutions and amounts to ZT ~ 1. The possibility of increasing ZT in the Mg_2Si_0.8Sn_0.2 solid solution with the additional inclusion of Mg_2Ge in small quantities is investigated here. Samples of Mg_2(Si_1 –_ x Ge_ x )_0.8Sn_0.2 ( x < 0.03) solid solution are prepared by hot pressing. The temperature dependences of the coefficients of the thermoelectric power, electrical conductivity, and thermal conductivity are measured in the range of 300–800 K. An increase in the thermoelectric figure of merit to ZT = 1.1 is shown at T = 800 K in the Mg_2Si_0.78Ge_0.02Sn_0.2〈Sb〉 solid solution.

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

Cytomembrane Preservation in Tissue Dehydrated Only With Glutaraldehyde and Epon 812 Resin

1973 ◽  
Vol 31 ◽  
pp. 320-321
Author(s):  
Daniel C. Pease
Keyword(s):  
Diffraction Pattern ◽  
X Ray Diffraction ◽  
High Concentration ◽  
Unpublished Study ◽  
X Ray ◽  
Sectioned Material

A previous study demonstrated that tissue could be successfully infiltrated with 50% glutaraldehyde, and then subsequently polymerized with urea to create an embedment which retained cytomembrane lipids in sectioned material. As a result, the 180-190 Å periodicity characteristic of fresh, mammalian myelin was preserved in sections, as was a brilliant birefringence, and the capacity to bind OsO4 vapor in the hydrophobic bilayers. An associated (unpublished) study, carried out in co-operation with Drs. C.K. Akers and D.F. Parsons, demonstrated that the high concentration of glutaraldehyde (and urea) did not significantly alter the X-ray diffraction pattern of aldehyde-fixed, myelin. Thus, by itself, 50% glutaraldehyde has little effect upon cytomembrane systems and can be used with confidence for the first stages of dehydration.

Solid Solution Effects and Deformation Micros trueture of Shock-Loaded Iron Manganese Alloys

1970 ◽  
Vol 28 ◽  
pp. 420-421
Author(s):  
A. Christou ◽  
J. V. Foltz ◽  
N. Brown
Keyword(s):  
Solid Solution ◽  
Shock Loading ◽  
High Strain ◽  
Local Stress ◽  
Strain Rates ◽  
Local Stress Concentration ◽  
Bcc Metals ◽  
Manganese Alloys ◽  
Iron Manganese ◽  
Transmission Microscope

In general, all BCC transition metals have been observed to twin under appropriate conditions. At the present time various experimental reports of solid solution effects on BCC metals have been made. Indications are that solid solution effects are important in the formation of twins. The formation of twins in metals and alloys may be explained in terms of dislocation mechanisms. It has been suggested that twins are nucleated by the achievement of local stress-concentration of the order of 15 to 45 times the applied stress. Prietner and Leslie have found that twins in BCC metals are nucleated at intersections of (110) and (112) or (112) and (112) type of planes.In this paper, observations are reported of a transmission microscope study of the iron manganese series under conditions in which twins both were and were not formed. High strain rates produced by shock loading provided the appropriate deformation conditions. The workhardening mechanisms of one alloy (Fe - 7.37 wt% Mn) were studied in detail.

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