The ZnO-rich area of the ternary system ZnO-TiO2-SiO2

1975 ◽  
Vol 28 (11) ◽  
pp. 2373 ◽  
Author(s):  
AE Holland ◽  
ER Segnit
Keyword(s):  
Melting Point ◽  
Ternary System ◽  
High Temperatures ◽  
Liquid Immiscibility ◽  
Large Area ◽  
Ternary Compounds ◽  
Invariant Points ◽  
Equilibrium Relationships

Equilibrium relationships in the zinc-rich corner of the ternary system ZnO-TiO2-SiO2 have been studied. No ternary compounds were found. Three invariant points were located, all eutectics. The minimum melting point in the system was 1315(�5)�C. A large area of liquid immiscibility at high temperatures is postulated.

The ternary system BaO-ZnO-SiO2

1970 ◽  
Vol 23 (6) ◽  
pp. 1077 ◽  
Author(s):  
ER Segnit ◽  
AE Holland
Keyword(s):  
Melting Point ◽  
Ternary System ◽  
Ternary Compounds ◽  
Molar Ratios ◽  
Invariant Points ◽  
Equilibrium Relationships

The equilibrium relationships in the greater part of the ternary system BaO-ZnO-SiO2 have been determined. Fifteen ternary invariant points have been located; six of these are eutectics, and the minimum melting point in the system is 1100� at a composition of 41.7% BaO, 17.00/0 ZnO, 41.3% SiO2 by weight. Five ternary compounds with molar ratios of BaO : ZnO : SiO2 of 1 : 1 : 1, 1 : 1 : 3, 1 : 2 : 2, 2 : 1 : 2, and 2 : 3 : 3 are described.

The ternary system Na2O-ZnO-SiO2

1966 ◽  
Vol 19 (6) ◽  
pp. 905 ◽  
Author(s):  
AE Holland ◽  
ER Segnit
Keyword(s):  
Melting Point ◽  
Ternary System ◽  
Incongruent Melting ◽  
Melting Points ◽  
Ternary Compounds ◽  
Molar Ratios ◽  
Invariant Points ◽  
Equilibrium Relationships

The equilibrium relationships in a large part of the system Na2O-ZnO-SiO2 have been determined. Of the eleven invariant points located, four are eutectics, the minimum melting point in the system being 680� at a composition of 21.5% Na2O, 12.0% ZnO, 66.5% SiO2 by weight. Four ternary compounds with molar ratios of Na2O : ZnO : SiO2 of 1 : 1 : 1, 1 : 1 : 2, 1 : 2 : 2, 2 : 2 : 3, all with incongruent melting points, are described.

CuxSbySz THIN FILMS PRODUCED BY ANNEALING CHEMICALLY DEPOSITED Sb2S3-CuS THIN FILMS

2001 ◽  
Vol 15 (17n19) ◽  
pp. 667-670 ◽  
Author(s):  
Y. RODRÍGUEZ-LAZCANO ◽  
M. T. S. NAIR ◽  
P. K. NAIR
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Band Gap ◽  
Deposition Method ◽  
Photovoltaic Devices ◽  
Large Area ◽  
Electrical And Optical Properties ◽  
Ternary Compounds ◽  
Glass Substrates ◽  
Different Temperatures

The possibility of generating ternary compounds through annealing thin film stacks of binary composition has been demonstrated before. In this work we report a method to produce large area coating of ternary compounds through a reaction in solid state between thin films of Sb2S3 and CuS. Thin films of Sb2S3 -CuS were deposited on glass substrates in the sequence of Sb2S3 followed by CuS (on Sb2S3 ) using chemical bath deposition method. The multilayer stack, thus produced, of approximately 0.5 μm in thickness, where annealed under nitrogen and argon atmospheres at different temperatures to produce films of ternary composition, CuxSbySz . An optical band gap of ~1.5 eV was observed in these films, suggesting that the thin films of ternary composition formed in this way are suitable for use as absorber materials in photovoltaic devices. The results on the analyses of structural, electrical and optical properties of films formed with different combinations of thickness in the multilayers will be discussed in the paper.

Untersuchungen zum ternären System Bi/Te/O, III. Bestimmung thermodynamischer Daten der ternären Verbindungen/Investigations on the Ternary System Bi/Te/O,III. Determination of Thermodynamic Data of Ternary Compounds

1999 ◽  
Vol 54 (2) ◽  
pp. 252-260 ◽  
Author(s):  
P. Schmidt ◽  
C. Hennig ◽  
H. Oppermann
Keyword(s):  
Solid State ◽  
Ternary System ◽  
Thermodynamic Data ◽  
Phase Relations ◽  
Solid State Reactions ◽  
Enthalpies Of Formation ◽  
Ternary Compounds ◽  
Heats Of Solution

The phase relations in the ternary system Bi/Te/O have been determined in previous studies by solid state reactions. Thermodynamical data have now been obtained for the pertinent equilibria. The heats of solution of Bi2O3, Bi12TeO20, Bi10Te2O19, Bi16Te5O34, Bi2TeO5, Bi2Te2O7, Bi2Te4O11 and TeCl4 were determined in 4N HCl. From these the enthalpies of formation of bismuth tellurites at 298 K have been derived:⊿H°b (Bi12TeO20, f, 298) = -901,6 ± 8 kcal/mol,⊿H°b (Bi10Te2O19, f, 298) = -856,1 ± 9 kcal/mol,⊿H°b (Bi16Te5O34, f, 298) = -1519,5 ± 17 kcal/mol,⊿H°b (Bi2TeO5, f, 298)= -222,8 ± 3 kcal/mol,⊿H°b (Bi2Te2O7, f, 298)= -299,4 ± 4 kcal/mol,⊿H°b (Bi2Te4O11, f, 298)= -448,2 ± 7 kcal/mol.

Thermal Analysis of Nomex® and Kevlar® Fibers

1977 ◽  
Vol 47 (1) ◽  
pp. 62-66 ◽  
Author(s):  
J. R. Brown ◽  
B. C. Ennis
Keyword(s):  
Thermal Analysis ◽  
Thermal Decomposition ◽  
Glass Transition ◽  
Melting Point ◽  
Transition Region ◽  
High Temperatures ◽  
High Performance ◽  
Polymer Melt ◽  
Glass Transition Region ◽  
Dta Curves

DTA, TG, and TMA curves of commercial Kevlar® 49 and Nomex® fibers have been used to assess their behavior at high temperatures. The fibers lost absorbed water around 100°C, and a glass transition was reflected in the DTA and TMA curves in the region of 300°C. Difficulties in the interpretation of DTA and TMA curves in the glass-transition region and in the assignments of Tv‘s for these high-performance fibers are discussed. Whereas Kevlar 49 showed both a crystalline melting point (560°C) and a sharp endothermal thermal decomposition (590°C), Nomex showed only the latter (440°C) and no evidence of melting from the DTA curves. The endothermal decomposition peaks apparently correspond to “polymer melt temperatures” reported for related materials, and correlate well with the TG and TMA features. During thermal analysis of Kevlar 49, oxidation occurs more readily than thermal decomposition, but the latter predominates for Nomex. Differences between dyed and undyed Nomex were due to differences in yarn constitution.

The “Solidification” of Grain Boundaries with Increasing Temperature

1994 ◽  
Vol 357 ◽  
Author(s):  
Witold Lojkowski ◽  
Bogdan Palosz
Keyword(s):  
Solid State ◽  
Melting Point ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
High Temperatures ◽  
Low Temperatures ◽  
Melting Behavior ◽  
Wetting Transitions ◽  
Increasing Temperature ◽  
Segregation Of Impurities

AbstractThe aim of the paper is to explain the recently observed de-wetting grain boundary transition with increasing temperature. On the example of a bicrystal from the Fe-6at.%Si alloy, it was found recently that as temperature is increased, the following GB transitions take place: “solid” (or regular) GB-→“premelted” GB →“solid” GB. At the same time the wetting/de-wetting transitions have taken place. Another example of such GB behavior was discovered during sintering of alumina. The inverse melting behavior is explained as follows: low melting point impurities cause GB premelting at low temperatures, However de-segregation of impurities at high temperatures causes return of the GB structure to its regular “solid” state.

The Crystal Structures of the Cubic and Tetragonal Phases of Y1Ba3Cu2O6.5 + δand Y1Ba4Cu2O7.5 + δ

1988 ◽  
Vol 32 ◽  
pp. 497-505
Author(s):  
M. A. Rodriguez ◽  
J. J. Simmins ◽  
P. H. McCluskey ◽  
R. S. Zhou ◽  
R. L. Snyder
Keyword(s):  
Ternary System ◽  
Crystal Structures ◽  
Perovskite Structure ◽  
World Wide ◽  
Space Group ◽  
Ternary Compounds ◽  
Superconducting Material ◽  
Complete Study

The discovery of the superconducting material Y1Ba2Cu3O6+δ( “123” material) resulted in a world wide interest in the pseudo-ternary system BaO·YO·CuO. A complete study of the phases present in this system was initiated to develop a better understanding and processing of the superconducting 123 material. The crystal structures were established for two of the three ternary compounds in this system immediately after the discovery of superconductivity. One such phase was a green insulating compound Y2Ba1Cu1O5(”211”) which has the space group. The superconducting 123 compound was found to have the space group Pmmm and an ordered triple-celled perovskite structure.

Artificial Ceramic Metamaterial with Meshed Grid Structure for Radome Application

2014 ◽  
Vol 893 ◽  
pp. 11-14 ◽  
Author(s):  
Xian Gao Zhang ◽  
Xi Geng Miao ◽  
Xiao Wei Fang ◽  
Hai Lian Wang ◽  
Ling Zhang ◽  
...  
Keyword(s):  
Melting Point ◽  
High Temperatures ◽  
Quartz Glass ◽  
Screen Printing ◽  
Dielectric Material ◽  
Tape Casting ◽  
Unit Cell ◽  
Grid Structure ◽  
Transmission Characteristics

We investigated a novel artificial metamaterial that includes two plates of quartz glass dielectric material and a Ag microstructure sandwiched between the two plates. The Ag grid layer was designed and subsequently prepared by tape casting and screen printing. The transmission characteristics of this metamaterial were able to be controlled by adjusting the geometry parameters of the Ag grid such as the width of the strip and the size of the unit cell. Our work has demonstrated the possibility that the ceramic metamaterial can be used as a transmission material capable of work at high temperatures below the melting point of the metal.

102. Melting point equations for the ternary system water/sodium chloride/ethylene glycol revisited

Cryobiology ◽  
2008 ◽  
Vol 57 (3) ◽  
pp. 336 ◽  
Author(s):  
Erik J. Woods ◽  
Aniruddha Bagchi ◽  
James D. Benson ◽  
Xu Han ◽  
John K. Critser
Keyword(s):  
Sodium Chloride ◽  
Melting Point ◽  
Ternary System ◽  
Ethylene Glycol ◽  
System Water

scholarly journals On a new register-pyrometer, for measuring the expansions of solids, and determining the higher degrees of temperature upon the common thermometric scale

1833 ◽  
Vol 2 ◽  
pp. 404-406
Keyword(s):  
Melting Point ◽  
High Temperatures ◽  
The Other ◽  
Royal Institution ◽  
Guyton De Morveau ◽  
Higher Temperature ◽  
The Subject ◽  
The Common ◽  
The One ◽  
Universal Application

In the year 1821, the author published in the Journal of the Royal Institution an account of a new pyrometer, and of some determinations of high temperatures, in connexion with the scale of the mercurial thermometer, obtained by its means. The use of the instrument then described was, however, limited; and the author was subsequently led to the invention of a pyrometer of a more universal application, both to scientific researches and to various purposes of art. Fie introduces the subject by an account of the late attempt of M. Guyton de Morveau, to employ the expansions of platina for the admeasurement of high temperatures, and for connecting the indications of Wedgwood’s pyrometer with the mercurial scale, and verifying its regularity. The experiments of that philosopher were by the contraction of porcelain, and by actual comparison with those of the platina pyrometer, at no higher temperature than the melting point of antimony; but they are sufficient to establish the existence of a great error in Wedgwood’s original estimation of his degrees up to that point. This he carries on by calculation, on the hypothesis of uniform progression of expansion, up to the melting point of iron; the construction of his instrument not admitting of its application to higher temperatures than a red heat, in which platina becomes soft and ductile. Mr. Daniell shows, by an examination of M. Guyton’s results, that he has failed in establishing the point he laboured to prove; namely, the regularity of the contraction of the clay pieces. The pyrometer of the author consists of two distinct parts; the one designated the register , the other the scale .

Sign in / Sign up

Export Citation Format

Share Document