scholarly journals On Application of Hyperfree Energy for the Description of Thermodynamics of Mobile Components in Nonstoichiometric Partially Open Ceramic Systems

2020 ◽  
Author(s):  
Jaroslav Šesták
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Thermodynamic Functions ◽  
Energy Function ◽  
Initial Phase ◽  
Open Systems ◽  
Superconducting Materials ◽  
Mobile Component ◽  
Definition Of

Nonstoichiometric oxides form a new chapter in tailored materials. Founding and construction of thermodynamic functions related to solid (geologic, metallurgic) materials is traced showing interactions between Czech Professor F. Wald and Russians R.S. Kurnakov and D.S. Korzhinskiĭ and further developed by Czech P. Holba in the initial phase definition and related characterization of partially open systems. A gradual increase in thermodynamic concepts related to solid-state description is investigated in more detail. For the associated thermodynamic definition of the mobile component, the previously formulated hyperfree energy function, which was recently applied to several systems, was used. As a measure of the material disposition for the absorption of the free component, an innovative term of plutability is proposed, which allows the introduction of various forecaster variables such as temperature, pressure, and activity. Examples of practical application are examples of high-temperature superconducting materials, where the Czech school of thermodynamics is emphasized.

scholarly journals On chronicle and recent exploit of a special clone of free energy (hyper) beneficial to thermodynamic description of partially open geological, metallurgical and other nonstoichiometric systems

2017 ◽  
Vol 53 (3) ◽  
pp. 249-254 ◽  
Author(s):  
J. Sesták
Keyword(s):  
Free Energy ◽  
Solid State ◽  
Thermodynamic Functions ◽  
Open Systems ◽  
Thermodynamic Description ◽  
Systems Development ◽  
Geologic Materials ◽  
Definition Of

Founding and determination of thermodynamic functions related to solid often geologic materials is traced showing interactions between Czech Professor F. Wald and Russian R.S. Kurnakov and D.S. Korzhinski? in the early definition of phases and characterization of partly open systems. Development of thermodynamic notions regarding solid-state-gas description by P. Holba is reviewed showing its consequence in geology and metallurgy. For the joint definition of operate of mobile components the hyper-free energy was developed and recently put into function in nonstoichmetric systems. Novel even if unusual term of the associated new variable plutability is explained. Instigators of modern thermodynamic educate in both the Czechia and Serbia is made more noticeable.

Characterization of High-Temperature Superconducting Materials in Y-Ba-Cu-0 Systems

1989 ◽  
Vol 169 ◽  
Author(s):  
Hiroshi Kezuka ◽  
Tomomi Masaki
Keyword(s):  
High Temperature ◽  
Optical Constants ◽  
Superconducting Materials ◽  
Energy Dispersive ◽  
Optical Study ◽  
X Ray ◽  
High Temperature Superconducting

AbstractThe Y-Ba-Cu-0 systems have been reported to be a high temprature superconductor with above 90K. Optical Study would give us useful informations as a characterization for Y-Ba-Cu-0 systems with an analysis of energy dispersive X-ray system EDS. Optical constants of superconducting Y-Ba-Cu-0 systems are n*=1.6 92-j0.403 for 99.99%(4N) with Y1.00 Bal.90 Cu2.87 and n*=1.604-j 0.441 for 99.99%+ (4N+) with Y1.00 Ba2.18 Cu3.12.

Synthesis and structural characterization of Li3Y(BO3)2

2017 ◽  
Vol 72 (2) ◽  
pp. 153-158 ◽  
Author(s):  
Sebastian Bräuchle ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Solid State ◽  
Boric Acid ◽  
Structural Characterization ◽  
Diffraction Data ◽  
Lithium Carbonate ◽  
X Ray Diffraction ◽  
X Ray

AbstractLi3Y(BO3)2 was prepared by high-temperature solid state synthesis at 900°C in a platinum crucible from lithium carbonate, boric acid, and yttrium(III) oxide. The compound crystallizes monoclinically in the space group P21/c (no. 14) (Z=4) isotypically to Li3Gd(BO3)2. The structure was refined from single-crystal X-ray diffraction data: a=8.616(3), b=6.416(3), c=10.014(2) Å, β=116.6(2)°, V=494.9(3) Å3, R1=0.0211, and wR2=0.0378 for all data. The crystal structure of Li3Y(BO3)2 consists of [Y2O14] dinuclear units, which are interconnected to each other by planar B(1)O3 groups and LiO4 tetrahedra via common edges and corners along the a axis.

Synthesis and characterization of lanthanum silicate oxyapatites co-doped with A (A = Ba, Sr, and Ca) and Fe for solid oxide fuel cells

2014 ◽  
Vol 2 (48) ◽  
pp. 20739-20747 ◽  
Author(s):  
Xiao Guo Cao ◽  
San Ping Jiang
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid Oxide Fuel Cells ◽  
Solid State Reaction ◽  
Solid Oxide ◽  
Synthesis And Characterization ◽  
Oxide Fuel ◽  
Lanthanum Silicate ◽  
Co Doped

The co-doped lanthanum silicate oxyapatites, La9.5A0.5Si5.5Fe0.5O26.5 (A = Ba, Sr, and Ca), are synthesized by the high-temperature solid state reaction process.

Synthesis and structural characterization of BaSr2Ge3O9

2016 ◽  
Vol 71 (12) ◽  
pp. 1225-1232
Author(s):  
Sebastian Bräuchle ◽  
Clivia Hejny ◽  
Hubert Huppertz
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Structural Characterization ◽  
Diffraction Data ◽  
Barium Carbonate ◽  
Strontium Carbonate ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
X Ray

AbstractBaSr2Ge3O9 was prepared by high-temperature solid-state synthesis at 1100°C in a platinum crucible from barium carbonate, strontium carbonate, and germanium(IV) oxide. The compound crystallizes in the triclinic space group P1̅ (no. 2) isotypically to walstromite BaCa2Si3O9. The structure was refined from single-crystal X-ray diffraction data: a=7.104(5), b=10.060(7), c=7.099(5) Å, α=83.0(2), β=77.0(2), γ=70.2(2)°, V=464.3(6) Å3, R1=0.0230, and wR2=0.0602 for all data. BaSr2Ge3O9 is characterized by three-membered rings of germanate tetrahedra. There are three crystallographically different Ge sites (Ge1, Ge2, and Ge3) in each [Ge3O9]6− ring. The rings occur in layers with the apices of alternating rings pointing in opposite directions. The Sr2+ and Ba2+ ions are located in between. The Sr1 cation is eight-fold coordinated, while Sr2 is octahedrally surrounded by oxide anions, and the Ba cation again eight-fold coordinated.

scholarly journals Design, synthesis and characterization of a novel bluish-green long-lasting phosphorescence phosphor BaLu2Si3O10:Eu2+, Nd3+

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10246-10254 ◽  
Author(s):  
Jie Liu ◽  
Gen Li ◽  
Haijie Guo ◽  
Dongwei Liu ◽  
Peng Feng ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Synthesis And Characterization ◽  
Solid State Method ◽  
Design Synthesis ◽  
Bluish Green ◽  
State Method

A newly proposed bluish-green emitting long-lasting phosphor, BaLu2Si3O10:Eu2+, Nd3+, with prominent LLP properties is successfully achieved via a high temperature solid state method.

Solid-state NMR characterization of β-sialons from self-propagating high-temperature synthesis

1996 ◽  
Vol 6 (8) ◽  
pp. 1391-1393 ◽  
Author(s):  
Yong Yue ◽  
Heyong He ◽  
Jacek Klinowski ◽  
Yuanwen Wu ◽  
Hanrui Zhuang
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid State Nmr ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Nmr Characterization

Pixe Spectrometry as an Aid to Reconstruction of Ancient Processes of Bronze Production

1988 ◽  
Vol 123 ◽  
Author(s):  
C.P. Swann ◽  
S.J. Fleming
Keyword(s):  
High Temperature ◽  
Thermodynamic Properties ◽  
Qualitative Description ◽  
Copper Ore ◽  
Full Characterization ◽  
Definition Of ◽  
Metal Microstructure ◽  
Analytical Tools ◽  
By Products

The process of translating copper ore into a finished bronze involved a series of discrete steps (Fig. 1), the products and by-products of which comprise a diversity of materials. The full characterization of these materials, and thereby the reconstruction of how the metalworking artisans of a particular culture went about their craft, requires a variety of analytical tools, each applied with specific interpretive goals in mind. For example, the use of high power optical microscopy (with magnifications ranging 10x to 400x) allows a qualitative description of ore and slag petrography [1], and the definition of individual phases in metal microstructure (see, for example, refs. [2,3]); the use of high temperature cell (HTC) microscopy, offers a novel means of studying a slag's thermodynamic properties [4]; and so on.

Synthesis and structural characterization of Ca12Ge17B8O58

2016 ◽  
Vol 71 (11) ◽  
pp. 1141-1146
Author(s):  
Sebastian Bräuchle ◽  
Klaus Wurst ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Solid State ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Open Structure ◽  
X Ray ◽  
Tetragonal Crystal ◽  
Tetragonal Crystal System

AbstractCa12Ge17B8O58 was prepared by high-temperature solid state synthesis at 1100°C in a platinum crucible from calcium carbonate, boric acid, and germanium(IV) oxide. The compound crystallizes in the tetragonal crystal system in the space group P4̅ (No. 81) isotypically to Cd12Ge17B8O58. The structure was refined from single-crystal X-ray diffraction data: a = 15.053(8), c = 4.723(2) Å, V = 1070.2(2) Å3, R1 = 0.0151, and wR2 = 0.0339 for all data. The crystal structure of Ca12Ge17B8O58 consists of [Ge4O12]n chains composed of GeO4 tetrahedra and GeO6 octahedra. The chains are interconnected into a [Ge4O10.5]n network via corner sharing. By additional [Ge(B2O7)4]28– clusters, these units are connected to a three-dimensional [Ge17B8O58]24– framework. The open structure forms three types of tunnels with five-, six-, and seven-membered rings (MRs) along the c axis, where the Ca2+ are located.

Sign in / Sign up

Export Citation Format

Share Document