Thermoelectric properties of cubic Ba-substituted strontium disilicide, Sr1-Ba Si2, with Ba content above solid solubility limit

2020 ◽  
Vol 127 ◽  
pp. 106981
Author(s):  
Shiva Kumar Singh ◽  
Motoharu Imai
Keyword(s):  
Thermoelectric Properties ◽  
Solid Solubility ◽  
Solubility Limit ◽  
Solid Solubility Limit

Positron annihilation study on the solid solubility limit of neodymium in pure iron

1985 ◽  
Vol 19 (1) ◽  
pp. 79-82 ◽  
Author(s):  
He You ◽  
Chang Xiang-rong ◽  
Tian Zhong-zhuo ◽  
Hsiao Chi-mei ◽  
Wang Ming-hua ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Solid Solubility ◽  
Pure Iron ◽  
Solubility Limit ◽  
Solid Solubility Limit ◽  
Positron Annihilation Study

Structures and microwave dielectric properties of Ba6−3x(Nd,Biy)8+2xTi18O54 (x = 2/3) solid solution

2001 ◽  
Vol 16 (6) ◽  
pp. 1734-1738 ◽  
Author(s):  
Yong Jun Wu ◽  
Xiang Ming Chen
Keyword(s):  
Solid Solution ◽  
Dielectric Properties ◽  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Solid Solubility ◽  
Microwave Dielectric Properties ◽  
Solubility Limit ◽  
Solid Solubility Limit ◽  
Continuous Increase ◽  
Microwave Dielectric

The effects of Bi substitution for Nd in Ba6−3xNd8+2xTi18O54 (x = 2/3) solid solution upon the microstructures and microwave dielectric properties were investigated. The solid solubility limit of Bi in Ba6−3xNd8+2xTi18O54 (x = 2/3) solid solution was about 15 mol%, the same as that for x = 0.5, and densification of the present solid solutions could be performed well at lower temperatures. However, the variation tendency of microwave dielectric properties with composition in the present ceramics quite differed from that for x = 0.5: (1) The temperature coefficient of resonant frequency in the present ceramics showed a continuous variation from positive to negative and did not indicate extreme value at the solid solubility limit. (2) Near-zero temperature coefficient of resonant frequency combined with high-ε and high-Qf values could be obtained in the present ceramics, while that for x = 0.5 had a lower limit of +15 ppm/°C. (3) The dielectric constant also showed a continuous increase for the present compositions, while that in x = 0.5 had an extreme at solid solubility limit. Ceramics with composition of Ba6−3x(Nd0.85,Bi0.15)8+2xTi18O54 (x = 2/3) showed excellent dielectric properties of ε = 99.1, Qf = 5290 GHz, and τf = −5.5 ppm/°C.

Effects of Mechanical Alloying on Solid Solubility

2016 ◽  
Vol 15 ◽  
pp. 17-24 ◽  
Author(s):  
Anshuman Patra ◽  
Swapan Kumar Karak ◽  
Snehanshu Pal
Keyword(s):  
Mechanical Alloying ◽  
Solid Solubility ◽  
Room Temperature ◽  
Milling Time ◽  
Solubility Limit ◽  
Atomic Diffusion ◽  
Solid Solubility Limit ◽  
Solubility Improvement ◽  
Particle Refinement ◽  
Non Equilibrium

Mechanical alloying (MA) is a potential processing method for various equilibrium and non-equilibrium alloy phases such as supersaturated solid solution, metastable crystalline, amorphous, quasi-crystalline phases, nanostructures. Compared to conventional high temperature material processing such as melting and casting, improvement of solid solubility limit results from mechanical alloying at room temperature. The solid solubility increases with increase in milling time due to enhanced stress assisted atomic diffusion during particle refinement and reaches a saturation level at higher milling time. The extension of solid solubility is attributed to thermodynamic, dynamic or kinetic factors such as high dislocation density due to severe plastic deformation during particle refinement and enhanced diffusivity during MA. The review aims to discuss the insight of MA than other non-equilibrium processing in terms of achieving higher solubility, reasoning and mechanism of solubility improvement during MA of different alloy systems.

Solid solubility limit of cerium in CaS: Ce3+ phosphor

1986 ◽  
Vol 5 (3) ◽  
pp. 359-360 ◽  
Author(s):  
G. C. Kim ◽  
H. L. Park ◽  
S. I. Yun ◽  
B. G. Moon
Keyword(s):  
Solid Solubility ◽  
Solubility Limit ◽  
Solid Solubility Limit

Crystal Structure and Thermoelectric Properties of Mn-Substituted Ru2Si3 with the Chimney-Ladder Structure

2008 ◽  
Vol 1128 ◽  
Author(s):  
Tatsuya Koyama ◽  
Norihiko L. Okamoto ◽  
Kyosuke Kishida ◽  
Katsushi Tanaka ◽  
Haruyuki Inui
Keyword(s):  
Thermoelectric Properties ◽  
Solid Solubility ◽  
Solubility Limit ◽  
Ladder Structure ◽  
Thermoelectric Power Factor ◽  
Compositional Range ◽  
General Chemical ◽  
Ternary Element ◽  
Wide Compositional Range ◽  
Mn Content

AbstractChimney-ladder compounds with the general chemical formula of Mn X2n-m (n, m: integers) possess tetragonal crystal structures which consist of two types of subcells; one composed of transition metal atoms (M) with the γÀ-Sn structure and the other composed of group 13 or 14 atoms (X) with a helical arrangement along the tetragonal c-axis. Since the chimney-ladder compounds generally exhibit very low thermal conductivity, presumably due to its long periodicity along the c-axis, they have been extensively investigated as promising thermoelectric materials. The high-temperature (HT) phase of Ru2Si3 is one of the chimney-ladder compounds with n=2 and m=1. Recently we have found that the HT-Ru2Si3 phase is stabilized by substituting Ru with Re so as to exist even at low temperatures in a wide compositional range of the Re content (Re: 14 to 73%), and that the thermoelectric power factor for alloys with high Re contents increases with the Re content and the highest value was obtained for the alloy with the highest Re content (73%), which is the solubility limit of Re in the chimney-ladder phase. In order to further enhance the thermoelectric properties, another ternary element which extends the solid solubility region of the HT-Ru2Si3 phase is favorable. We have chosen Mn as the ternary element because Mn4Si7 with the chimney-ladder structure exists as a counterpart of HT-Ru2Si3 in the Ru2Si3 -Mn4Si7 pseudo-binary system so that the solid solubility region of the chimney-ladder phase is anticipated to extend in a wider composition range than the Re case. Our study, in fact, shows that the Mn-substitution stabilizes the HT-Ru2Si3 phase in a wide compositional range of the Mn content; 12 to 100%. Compositional analyses indicate that the Si/M ratio gradually increases as the Mn content increases. This is considered to be due to the addition of Si atoms in the Si subcell in order to compensate the decrease in the valence electron concentrations (VEC) per M atom by the substitution of Ru (group 8) with Mn (group 7) with fewer valence electrons. The Seebeck coefficient and electrical resistivity of the Mn-substituted Ru2Si3 are explained in terms of the VEC deviation from the idealized value, 14, which is expected for intrinsic semiconductors with the chimney-ladder structure. The highest dimensionless thermoelectric figure of merit (ZT=0.76) is obtained for 90%Mn-substituted alloy. The relationships between the microstructure and thermoelectric properties will be discussed.

scholarly journals High Quality Ti-Implanted Si Layers Above Solid Solubility Limit

2009 ◽  
Author(s):  
J. Olea ◽  
D. Pastor ◽  
M. Toledano-Luque ◽  
E. San-Andres ◽  
I. Martil ◽  
...  
Keyword(s):  
Solid Solubility ◽  
Solubility Limit ◽  
High Quality ◽  
Solid Solubility Limit

scholarly journals Microscopy and the Solid Solubility Limit in K1-xMnxTaO3 Ceramics

2012 ◽  
Vol 18 (S5) ◽  
pp. 89-90 ◽  
Author(s):  
Alexander Tkach ◽  
Paula M. Vilarinho ◽  
Abílio Almeida
Keyword(s):  
Solid Solubility ◽  
Magnetic Anomalies ◽  
Solubility Limit ◽  
Multiferroic Materials ◽  
Solid Solubility Limit ◽  
A Site ◽  
Perovskite Lattice

Multiferroic materials, combining at least two of three properties: ferromagnetism, ferroelectricity and ferroelasticity in the same phase, have been widely studied nowadays and have tremendous potential for multifunctional applications, although magnetoelectric multiferroics are difficult to obtain. Recently, dielectric and magnetic anomalies were found to be coupled in the incipient ferroelectrics SrTiO3 and KTaO3 doped with Mn on A-site of ABO3 perovskite lattice.

Revelation of solid solubility limit Fe/Ni = 1/12 in corrosion resistant Cu-Ni alloys and relevant cluster model

2010 ◽  
Vol 25 (2) ◽  
pp. 328-336 ◽  
Author(s):  
Jie Zhang ◽  
Qing Wang ◽  
Yingmin Wang ◽  
Chunyan Li ◽  
Lishi Wen ◽  
...  
Keyword(s):  
Solid Solubility ◽  
Solubility Limit ◽  
Corrosion Performance ◽  
Corrosion Properties ◽  
Solid Solubility Limit ◽  
Corrosion Resistant ◽  
Ni Alloys ◽  
Alloy Series ◽  
Fe Content ◽  
Ni Alloy

Minor Fe additions are necessary to enhance the corrosion resistance of commercial Cu-Ni alloys. The present paper aims at optimizing the Fe content in three alloy series Cu90(Ni,Fe)10, Cu80(Ni,Fe)20, and Cu70(Ni,Fe)30 (at.%) from the viewpoint of their corrosion performance in a 3.5% NaCl solution. An Fe/Ni = 1/12 solid solubility limit line was revealed in the Cu-Ni-Fe phase diagram. Three Fe/Ni = 1/12 alloys, Cu90Ni9.23Fe0.77 (at.%) = Cu-8.6Ni-0.7Fe (wt.%), Cu80Ni18.46Fe1.54 = Cu-17.3Ni-1.4Fe, and Cu70Ni27.7Fe2.3 = Cu-26.2Ni-2.1Fe, show the best corrosion performances in their respective alloy series. The Fe/Ni = 1/12 solubility limit is explained by assuming isolated Fe-centered FeNi12 cuboctahedral clusters embedded in a Cu matrix. The three Fe/Ni = 1/12 alloys can be respectively described by cluster formulas [Fe1Ni12]Cu117, [Fe1Ni12]Cu52, and [Fe1Ni12]Cu30.3. The Fe/Ni = 1/12 rule may serve an important guideline in the industrial Cu-Ni alloy selection because above this limit, easy precipitation would negate the corrosion properties of the Cu-Ni-based alloys.

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