Download or read book Diffusion Studies in Lead Selenide and Lead Telluride written by J. Bruce Wagner (Jr) and published by . This book was released on 1968 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary is given of research on the transport of atoms in lead salts in an effort to contribute to the understanding of the lattice disorder in these compounds.

Download or read book Research in Progress written by and published by . This book was released on 1975 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bismuth Lead and Tin Tellurides written by and published by . This book was released on 1965 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 699 references are included to journal articles and reports dealing with properties of bismuth, lead, and tin tellurides. The references are arranged by sujbect. Author and report-number indexes are included.

Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book First Principles Study of Structural Electronic and Mechanical Properties of Lead Selenide and Lead Telluride written by John E. Petersen (III.) and published by . This book was released on 2013 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lead chalcogenides, most notably lead selenide (PbSe) and lead telluride (PbTe), have become an active area of research due to their thermoelectric properties. The high figure of merit (zT) of these materials has brought much attention to them, due to their ability to convert waste heat into electricity. Recent efforts, such as applying pressure or doping, have shown an increase in thermoelectric efficiency. Variation in application and synthesis conditions gives rise to a need for analysis of structural, electronic, and mechanical properties of these materials at different pressures. In addition to the NaCl structure at ambient conditions, lead chalcogenides have a dynamic orthorhombic (Pnma) intermediate pressure phase and a higher pressure, yet stable, CsCl phase. By altering the lattice constant, the application of external pressure is simulated; this has notable effects on total ground-state energy, band gap, and structural phase. Using the Projector Augmented Wave (PAW) Method and the Generalized Gradient Approximation (GGA) in Density Functional Theory (DFT), the phase transition pressures are calculated by finding the differences in enthalpy from total energy calculations. For each phase, elastic constants, bulk modulus, shear modulus, and Young's modulus are calculated, and the NaCl phase is studied with typical dopants, both n-type (Bi, In, and I) and p-type (Na and Tl). Pugh's ratio is employed to give insight on the brittleness of the materials and phases studied. In addition to structural and mechanical properties, the band structure and density of states are analyzed at varying pressures, paying special note to thermoelectric implications. The results presented here will be useful to guide future experiments toward the search for structurally stable thermoelectric materials. Several mechanical properties predicted here are ready to be confirmed by experimental works.

Download or read book TID written by and published by . This book was released on 1965 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Self Diffusion Studies in Single Crystals of Lead Sulfide and Lead Selenide written by Martin S. Seltzer and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lead Abstracts written by and published by . This book was released on 1973 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Diffusion of Nickel and Chlorine Into Lead Telluride written by Thomas Dale George and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Self diffusion of Lead and Tellurium in Lead Telluride written by Mario Pio Gomez and published by . This book was released on 1964 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The defect structure of PbTe was investigated by studying the self-diffusion of Pb and Te as a function of deviation from stoichiometry and temperature. Microlapping and radioactive tracer techniques were used to determine the diffusion coefficients from concentration vs. penetration profiles corresponding to the Van Ostrand-Dewey solution of Fick's second law. The self-siffusion of Pb-210 can be explained by assuming that two mechanisms operate, one at high Te concentrations with an activation energy of 61 Kcal per mole and one at low Te concentrations and excess Pb with an activation energy equal to 24 Kcal per mole. The diffusion coefficient D sub pb exhibited a minimum at all temperatures and at compositions close to stoichiometry, on the Te side. The Te self-diffusion coefficient decreases with decreasing Te concentration and has an activation energy equal to 24 Kcal per mole. From the dependence of the diffusivities upon concentration and temperature it has been concluded that Frenkel defects are present in the Pb sublattice and that interstitial Te is the predominant anion defect. (Author).

Download or read book Vapor Pressure of Lead Selenide and Lead Telluride written by Edward Eric Hansen and published by . This book was released on 1969 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Density of Lead Sulfide Lead Selenide and Lead Telluride written by R. F. BREBRICK and published by . This book was released on 1956 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967-04 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts Index written by and published by . This book was released on 1984 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multinary Alloys Based on IV VI and IV VI2 Semiconductors written by Vasyl Tomashyk and published by CRC Press. This book was released on 2024-08-21 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: IV-VI and IV-VI2 semiconductors have attracted considerable attention due to their applications in the fabrication of electronic and optoelectronic devices as infrared lasers and detectors. The electrical properties of these semiconductors can also be tuned by adding impurity atoms. Because of their wide application in various devices, the search for new semiconductor materials and the improvement of existing materials is an important field of study. Doping with impurities is a common method of modifying and diversifying the properties of physical and chemical semiconductors. This book covers all known information about the phase relations in multinary systems based on IV-VI and IV-VI2 semiconductors, providing the first systematic account of phase equilibria in multinary systems based on IV-VI and IV-VI2 semiconductors and making research originally published in Ukrainian and Russian accessible to the wider scientific community. This book will be of interest to undergraduate and graduate students studying materials science, solid state chemistry, and engineering. It will also be relevant for researchers at industrial and national laboratories, in addition to researchers of phase equilibria, inorganic chemists, and solid state physicists. Key Features: Provides up-to-date experimental and theoretical information Allows readers to synthesize semiconducting materials with predetermined properties Delivers a critical evaluation of many industrially important systems presented in the form of two-dimensional sections for the condensed phases