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Thematische Bibliographien / Binary Nitride

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Auswahl der wissenschaftlichen Literatur zum Thema „Binary Nitride“

Autor: Grafiati

Veröffentlicht am 1. April 2023

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Zeitschriftenartikel zum Thema "Binary Nitride"

1

FREEMANTLE, MICHAEL. „ELUSIVE BINARY NITRIDE PREPARED“. Chemical & Engineering News Archive 80, Nr. 20 (20.05.2002): 9. http://dx.doi.org/10.1021/cen-v080n020.p009a.

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Mondal, S., und A. K. Banthia. „Triethanolamine Molybdate, a New Polymeric Precursor for Molybdenum Nitride“. Advanced Materials Research 29-30 (November 2007): 195–98. http://dx.doi.org/10.4028/www.scientific.net/amr.29-30.195.

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Nitrides remain a relatively unexplored class of materials primarily due to the difficulties associated with their synthesis and characterization. Several synthetic routes, including high temperature reactions, microwave assisted synthesis, and the use of plasmas, to prepare binary and ternary nitrides have been explored. Transition metal nitrides form a class of materials with unique physical properties, which give them varied applications, as high temperature ceramics, magnetic materials, superconductors or catalysts. They are commonly prepared by high temperature conventional processes, but alternative synthetic approaches have also been explored, more recently, which utilize moderate temperature condition. Transition metal nitrides particularly, molybdenum nitride, niobium nitride, and tungsten nitride have important applications as catalyst in hydrodenitridation reactions. These nitrides have been traditionally synthesized using high temperature nitridation treatments of the oxides. The nitridation temperatures are very high (> 800- 1000 oC). The aim of our work is to synthesize molybdenum nitride by a simple, low-temperature route. The method involves pyrolysis of a polymeric precursor, which was prepared from the condensation reaction between triethanolamine and molybdic acid. The melting point of the product is 180oC. The polymeric precursor and its pyrolyzed products are characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). X-ray diffraction shows that molybdenum nitride (MoN) obtained from this method has hexagonal crystal structure. MoN is obtained by this method at very low temperature (~ 400 oC).

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Schnick, Wolfgang. „The First Nitride Spinels—New Synthetic Approaches to Binary Group 14 Nitrides“. Angewandte Chemie International Edition 38, Nr. 22 (15.11.1999): 3309–10. http://dx.doi.org/10.1002/(sici)1521-3773(19991115)38:22<3309::aid-anie3309>3.0.co;2-u.

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4

Schwarz, Benjamin, Regina E. Hörth, Ewald Bischoff, Ralf E. Schacherl und Eric J. Mittemeijer. „The Process of Tungsten-Nitride Precipitation upon Nitriding Ferritic Fe-0.5 at.% W Alloy“. Defect and Diffusion Forum 334-335 (Februar 2013): 284–89. http://dx.doi.org/10.4028/www.scientific.net/ddf.334-335.284.

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The precipitation of tungsten nitride upon internal nitriding of ferritic Fe-0.5 at.% W alloy was investigated at 610°C in a flowing NH3/H2 gas mixture. Different tungsten nitrides developed successively; the thermodynamically stable hexagonal δ-WN could not be detected. The state of deformation of the surface plays an important role for the development of tungsten nitride at the surface. The morphologies of the tungsten nitrides developed at the surface and those precipitated at some depth in the specimen are different. The nitride particles at the surface exhibit mostly an equiaxed morphology (with the size of the order 0.5 µm) and have a crystal structure which can be described as a superstructure derived from hexagonal δ-WN. These nitride particles show a strong preferred orientation with respect to the specimen frame of reference but have no relation with the crystal orientation of the surrounding ferrite matrix. In the bulk, nanosized and finely dispersed platelet-like precipitates grow preferentially along {100}α-Fe. It is unclear whether these precipitates consist of binary iron nitride α´´-Fe16N2 or of a ternary Fe-W-N. Additionally to the finely dispersed particles, bigger nitrides at ferrite grain boundaries develop exhibiting platelet-type morphology and possessing a crystal structure which can be also described as a superstructure derived from hexagonal δ-WN. Upon prolonged nitriding assumed discontinuous precipitation of the initially precipitated finely dispersed nitrides starts from the ferrite-grain boundaries resulting in lamellas consisting of alternate ferrite and hexagonal nitride lamellas, whereas the nitride lamellas having a Pitsch-Schrader orientation relationship with the surrounding ferrite matrix. The nitrides precipitated upon nitriding in the bulk were found to be unstable during H2 reduction at 470°C. Remarkably, upon such low temperature dissolution of the nitrides took place but only the nitrogen from the nitride particles could diffuse out of the nitride platelets and the specimen, leaving W-rich regions (W-clusters) at the location of the original precipitates.

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Kerdoud, Djahida, Faouzia Benkafada, Nora Boussouf und Chahrazed Benhamideche. „Nitride Materials: Synthesis, Crystal Structures, and Optical Properties“. Annales de Chimie - Science des Matériaux 46, Nr. 2 (30.04.2022): 103–8. http://dx.doi.org/10.18280/acsm.460206.

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Our research involves the preparation of transition metal nitrides of the composition Mn4N, NbN, Mo2N, TaN and ZrN. The synthesis of Li3N binary alkali metal nitride was also part of this work. Simple and cost-effective methods with relatively low impact on the environment have been privileged in the selection. The experimental work has focused on determining the optimum conditions of synthesis and the convenient high yield route to the desired nitrides, and ultimately improvement of the properties of the final materials. All samples were characterised by X-ray powder diffraction. Their structures will be discussed in more detail here. Optical band gap has been calculated from diffuse reflectance measurements. The air sensitivity of the nitrides was also probed.

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Bauers, Sage R., Aaron Holder, Wenhao Sun, Celeste L. Melamed, Rachel Woods-Robinson, John Mangum, John Perkins et al. „Ternary nitride semiconductors in the rocksalt crystal structure“. Proceedings of the National Academy of Sciences 116, Nr. 30 (03.07.2019): 14829–34. http://dx.doi.org/10.1073/pnas.1904926116.

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Inorganic nitrides with wurtzite crystal structures are well-known semiconductors used in optical and electronic devices. In contrast, rocksalt-structured nitrides are known for their superconducting and refractory properties. Breaking this dichotomy, here we report ternary nitride semiconductors with rocksalt crystal structures, remarkable electronic properties, and the general chemical formula MgxTM1−xN (TM = Ti, Zr, Hf, Nb). Our experiments show that these materials form over a broad metal composition range, and that Mg-rich compositions are nondegenerate semiconductors with visible-range optical absorption onsets (1.8 to 2.1 eV) and up to 100 cm2 V−1⋅s−1 electron mobility for MgZrN2 grown on MgO substrates. Complementary ab initio calculations reveal that these materials have disorder-tunable optical absorption, large dielectric constants, and electronic bandgaps that are relatively insensitive to disorder. These ternary MgxTM1−xN semiconductors are also structurally compatible both with binary TMN superconductors and main-group nitride semiconductors along certain crystallographic orientations. Overall, these results highlight MgxTM1−xN as a class of materials combining the semiconducting properties of main-group wurtzite nitrides and rocksalt structure of superconducting transition-metal nitrides.

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Wang, Xinwu, Haobin Sun, Hua Zhang, Changye Li, Chengliang Zhao, Shouji Si, Haibin Yao, Huijun Yu und Chuanzhong Chen. „Advances in binary nitride coatings for cemented carbides“. Journal of Physics: Conference Series 2256, Nr. 1 (01.04.2022): 012020. http://dx.doi.org/10.1088/1742-6596/2256/1/012020.

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Abstract With the development of science and technology, cemented carbide tool coatings for machining are updating constantly. Different chemical elements in tool coatings have different performance. This paper introduces the current status of the use of various chemical elements in carbide tool coatings, common chemical elements include metallic elements (transition metal elements, rare-earth elements and aluminium elements) and non-metallic elements (silicon and boron). In addition, this paper presents the current status of research on related basic coatings which includes CrN, TiN, TiCN and CrCN coating, and it looks ahead the develop of tool coating prospect as well.

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Dziubek, K., M. Ceppatelli, D. Scelta, M. Serrano-Ruiz, M. Morana, V. Svitlyk, G. Garbarino et al. „Binary arsenic nitride synthesized from elements under pressure“. Acta Crystallographica Section A Foundations and Advances 78, a2 (23.08.2022): a180. http://dx.doi.org/10.1107/s2053273322095201.

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Ghufran, Muhammad, Ghulam Moeen Uddin, Syed Muhammad Arafat, Muhammad Jawad und Abdul Rehman. „Development and tribo-mechanical properties of functional ternary nitride coatings: Applications-based comprehensive review“. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 235, Nr. 1 (11.06.2020): 196–232. http://dx.doi.org/10.1177/1350650120933412.

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Friction and wear are very crucial aspects of the performance, service life, and the operational costs for a mechanical component or equipment. To reduce the friction and wear at the interface of the sliding or mating parts, different conventional binary coatings like TiN, CrN, TiC, etc., have been used in the last two decades. But ternary nitride coatings have replaced the binary coatings due to better tribo-mechanical properties. Now, ternary nitride coatings are being extensively used in several fields such as cutting tools, machinery parts, orthopedic implants, microelectronics, marine equipment, decorative purposes, automotive, aerospace industry, etc. Many researchers have developed and investigated the ternary nitride coatings for different applications. Nonetheless, there is a huge research potential in the development and optimization of the tribo-mechanical properties of the ternary nitride coatings. Therefore, tribo-mechanical studies of the ternary nitride coatings are needed for fostering the new industrial applications. This paper is focused to summarize and compare the tribo-mechanical properties of the ternary nitride coatings comprehensively and aims to explore the novel research directions in the development of the ternary nitride coatings.

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Schwarz, Ulrich, Kai Guo, William P. Clark, Ulrich Burkhardt, Matej Bobnar, Rodrigo Castillo, Lev Akselrud und Rainer Niewa. „Ferromagnetic ε-Fe2MnN: High-Pressure Synthesis, Hardness and Magnetic Properties“. Materials 12, Nr. 12 (21.06.2019): 1993. http://dx.doi.org/10.3390/ma12121993.

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The iron manganese nitride Fe2MnN was obtained by high-pressure–high-temperature synthesis from ζ-Fe2N and elemental Mn at 15(2) GPa and 1573(200) K. The phase crystallizes isostructural to binary ε-Fe3N. In comparison to the corresponding binary iron nitride, the microhardness of ε-Fe2MnN is reduced to 6.2(2) GPa. Above about 800 K the ternary compound decomposes exothermally under loss of nitrogen. ε-Fe2MnN is ferromagnetic with a Curie temperature of roughly 402 K.

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Dissertationen zum Thema "Binary Nitride"

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Meka, Sai Ramudu [Verfasser], und Eric J. [Akademischer Betreuer] Mittemeijer. „Nitriding of iron-based binary and ternary alloys : microstructural development during nitride precipitation / Sai Ramudu Meka. Betreuer: E. J. Mittemeijer“. Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2012. http://d-nb.info/1018893474/34.

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Kasic, Alexander [Verfasser]. „Phonons, free-carrier properties, and electronic interband transitions of binary, ternary, and quaternary group-III nitride layers measured by spectroscopic ellipsometry / Alexander Kasic“. Aachen : Shaker, 2003. http://d-nb.info/117054195X/34.

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Gehrmann, Jan. „Transferable reduced TB models for elemental Si and N and binary Si-N systems“. Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:002b0c99-0e9d-4d8c-a0dc-ad07383f083f.

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Silicon nitride is a bulk and a coating material exhibiting excellent mechanical properties. The understanding of the complex processes at the nanometre scale gained through experimental research will be enhanced by the existence of a computationally efficient and accurate model that is able to describe the mechanical properties of silicon nitride. Such a model has yet to be proposed. In this thesis we present a transferable reduced tight-binding (TB) model for the silicon nitride system. More precisely, this model consists of a reduced TB model for elemental silicon, a reduced TB model for elemental nitrogen, and a reduced TB model for silicon nitride. These models are developed within the framework of coarse-graining the electronic structure from density functional theory (DFT) to tight binding (TB) to bond-order potentials (BOPs), and can therefore be used in the future as the stepping stone to develop BOPs for the application in large scale simulations. The bond integrals employed in the reduced TB models are obtained directly from mixed-basis DFT projections of wave functions onto a minimal basis of atom-centred orbitals. This approach reduces the number of overall parameters to be fitted and provides models which are transferable through the different coarse-graining levels. We provide an example by using the same bond integrals in the reduced TB model for silicon and the preliminary bond-based BOP for silicon. DFT binding energies of ground state and metastable crystal structures are used as the benchmark to which the TB and BOP repulsive parameters are fitted. In addition to model development, we present an improved methodology when going from TB to reduced TB. By weighting all four σ TB bond integrals equally, we provide a new parameterisation (Eqs. (2.73) and (2.74)) and show that the quality of the silicon reduced TB model can be increased by choosing one of the reduced TB parameters to be distance invariant. The ingredients, the development methodology, and the quality of each of the four models are discussed in a separate chapter. The quality of the reduced TB models and BOP is demonstrated by comparing their predictions for the binding energies, heats of formation, elastic constants, and defect energies with DFT and experimental values.

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Siddons, Daniel James. „Synthetic routes to binary and ternary nitrides“. Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363637.

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O'Meara, Paul Martin. „The synthesis and characterisation of binary and ternary nitrides“. Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311740.

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Bowman, Amy. „Synthesis and characteristation of binary and ternary nitrides with two-dimensional structures“. Thesis, Nottingham Trent University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275911.

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Holleck, H. [Verfasser]. „Binaere und ternaere Carbide und Nitride der Uebergangsmetalle und ihre Phasenbeziehungen / H. Holleck“. Karlsruhe : KIT-Bibliothek, 2012. http://d-nb.info/1190100371/34.

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Feregotto, Virginia. „Observation par microscopie électronique en transmission des défauts étendus introduits par déformation à haute température dans le nitrure d'aluminium“. Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL142N.

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Nous avons déformé par compression, jusqu'à 10%, des polycristaux de nitrure d'aluminium (AlN) et nous avons étudié les défauts étendus introduits. Les essais mécaniques ont été effectués entre 1550 et 1650°C sous atmosphère neutre, soit par fluage sous des contraintes de 150 à 250 MPa soit à vitesse de déformation constante ([Epsilon] = 5. 10-⁶ s-¹). Les courbes de fluage sont constituées d'un stade transitoire et d'un stade quasi-stationnaire tandis que les courbes à [Epsilon] constant présentent un léger crochet de traction suivi d'un stade à faible durcissement. La principale conséquence de la déformation est la création aux joints de grains de cavités qui coalescent créant de longs vides responsables de la ruine du matériau. Les résultats les plus originaux concernent l'observation des défauts intragranulaires étendus, notamment les dislocations, les boucles de dislocations, les fautes d'empilement et les parois de domaines d'inversion (IDBs). La densité de dislocation, initialement très faible, croit avec la déformation jusqu'à atteindre localement 10¹⁰cm-². Le mouvement des dislocations se produit selon la valeur de la contrainte, par glissement dans le plan de base et dans d'autres plans (surtout {1010}), ou par montée. Des sous-joints de flexion et de torsion ont été observés. La plupart des dislocations sont de type a mais quelques empilements de dislocations c+a ont été vus dans (0001). De larges fautes d'empilements, situées dans (0001) et bordées de dislocations partielles de Shockley ou de Frank-Shockley, ont été observées sur des échantillons déformés à faible [Sigma]. Simultanément à ces fautes, on note la présence des boucles, dont la nature et la densité dépend très fortement des conditions de déformation: il s'agit de boucles de Frank, de Frank-Shockley et de quelques boucles de Shockley. La caractérisation des boucles de Frank (R = ± c/2), montre qu'elles résultent de la précipitation d'atomes interstitiels, ce qui suggère une diffusion couplée des atomes d'aluminium et d'azote. Les IDBs constituent souvent des obstacles au mouvement des dislocations. Dans certains IDBs plans nous avons mis en évidence la formation de réseaux constitués de dislocations des trois vecteurs de burgers a, dissociées, avec nœuds alternativement étendus et constrictes, configurations qui n'avaient jamais été observées

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Akhlaghi, Maryam [Verfasser], und Eric Jan [Akademischer Betreuer] Mittemeijer. „Precipitation of nitrides in iron-based binary and ternary alloys; influence of defects and transformation-misfit stresses / Maryam Akhlaghi. Betreuer: Eric Jan Mittemeijer“. Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2016. http://d-nb.info/1082238171/34.

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Richter, Sebastian. „Neue binäre CN-Verbindungen sowie Vorläufersubstanzen von monomerem C3N4“. Doctoral thesis, Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-155547.

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Gegenstand dieser Arbeit sind Versuche zur Synthese neuer binärer Kohlenstoffnitride im Allgemeinen und von C3N4-Vorläuferverbindungen im Speziellen. Hierbei werden v. a. die Herstellung und die Eigenschaften organischer Polyazide beschrieben, die aufgrund ihrer Gefährlichkeit durch zahlreiche Folgereaktionen in weniger brisante Moleküle überführt werden mussten. Als Derivatisierungsreaktionen kamen hierbei beispielsweise die 1,3-dipolare Cycloaddition mit Norbornen und Cyclooctin, die STAUDINGER-Reaktion mit verschiedenen Phosphinen sowie die Aza-WITTIG-Reaktion zum Einsatz. Es konnten dabei u. a. zehn Röntgeneinkristallstrukturen erhalten und als Strukturbeweis aufgeführt werden. Zahlreiche hochaufgelöste Massenspektren sowie Elementaranalysen und NMR-Daten bestätigten außerdem alle neu erhaltenen Strukturen. Einen weiteren Schwerpunkt dieser Arbeit stellen Versuche zur Synthese von monomerem C3N4 dar, dessen Herstellung zwar nicht gelang, für dessen Bildung allerdings neue Möglichkeiten ausgehend von verschiedenen Edukten beschrieben werden. Darüber hinaus wurden bereits bekannte Moleküle auf ihre Eignung als C3N4-Vorläufer untersucht, wobei z. B. durch Azid-Addition an Nitrilgruppen unerwartete neue Produkte erhalten werden konnten.

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Buchteile zum Thema "Binary Nitride"

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Predel, F. „Crystal structure of Ti-N (titanium-nitride) system“. In Phase Equilibria, Crystallographic and Thermodynamic Data of Binary Alloys, 90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-24977-8_46.

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Davis, Robert F., Michael D. Bremser, Ok-Hyun Nam, William G. Perry, Tsvetanka Zheleva und K. Shawn Ailey. „Chemical Considerations Regarding the Vapor-Phase Epitaxy of Binary and Ternary III-Nitride Thin Films“. In Synthesis and Characterization of Advanced Materials, 12–25. Washington, DC: American Chemical Society, 1997. http://dx.doi.org/10.1021/bk-1998-0681.ch003.

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Bondar, O. V., Alexander D. Pogrebnjak, Y. Takeda, B. Postolnyi, P. Zukowski, R. Sakenova, V. Beresnev und V. Stolbovoy. „Structure and Properties of Combined Multilayer Coatings Based on Alternative Triple Nitride and Binary Metallic Layers“. In Lecture Notes in Mechanical Engineering, 31–40. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6133-3_3.

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Sahoo, Bijaya Kumar. „Macroscopic Polarization and Thermal Conductivity of Binary Wurtzite Nitrides“. In Advanced Sensor and Detection Materials, 439–52. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118774038.ch13.

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Holze, Rudolf. „Ionic conductivities of binary mixture of water and pyrrolidinium nitrate“. In Electrochemistry, 1920. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-02723-9_1598.

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Holze, Rudolf. „Ionic conductivities of binary mixture of γ-butyrolactone and pyrrolidinium nitrate“. In Electrochemistry, 1921–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-02723-9_1599.

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Holze, Rudolf. „Ionic conductivities of binary mixture of n-butylammonium nitrate and water“. In Electrochemistry, 2056. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-02723-9_1661.

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Holze, Rudolf. „Ionic conductivities of binary mixture of {(C12H25)2-bim)}-HSO4 N,N'-dodecylbenzimidazol nitrate and ethanol“. In Electrochemistry, 1777. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-02723-9_1514.

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Low, I. M., und W. K. Pang. „Decomposition Kinetics of MAX Phases in Extreme Environments“. In MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments, 34–48. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-4066-5.ch002.

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MAX phases are remarkable materials but they become unstable at elevated temperatures and decompose into binary carbides or nitrides in inert atmospheres. The susceptibility of MAX phases to thermal dissociation at 1300-1550 °C in high vacuum has been studied using in-situ neutron diffraction. Above 1400 °C, MAX phases decomposed to binary carbide (e.g., TiCx) or binary nitride (e.g., TiNx), primarily through the sublimation of A-elements such as Al or Si, which results in a porous surface layer of MXx being formed Positive activation energies were determined for decomposed MAX phases with coarse pores but a negative activation energy when the pore size was less than 1.0 µm. The kinetics of isothermal phase decomposition at 1550 °C was modelled using a modified Avrami equation. An Avrami exponent (n) of < 1.0 was determined, indicative of the highly restricted diffusion of Al or Si between the channels of M6X octahedra. The role of pore microstructures on the decomposition kinetics is discussed.

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Mittal, Divyansh, Daljeet Singh und Sandan Kumar Sharma. „Thermal Characteristics and Tribological Performances of Solid Lubricants: A Mini Review“. In Advanced Rheology and Its Applications [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.109982.

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Solid lubricants separate two moving surfaces and reduce wear. Materials’ ability to act as solid lubricants depends on their characteristics relative to contact surfaces. Chemically stable fluorides (BaF2, CaF2), boron nitride (h-BN), transition metallic sulphides (MoS2, WS2), soft metals (Au, Ag), binary and multi-component oxides, such as silver-containing sulphates, chromates, and oxides, and MXenes are effective solid lubricants. Solid lubrication depends on the material’s structure. Structure, mechanical properties, chemical reactivity, and kind of substance characterise these materials (refractories, ceramics, glass, etc.). High temperatures (>300°C) are obtained at asperities due to frictional heat produced when two surfaces rub. High temperatures can breakdown lubricants, but the resulting compounds must be lubricants; otherwise, corrosive vapours or abrasive solids can occur. High thermal conductivity helps lubricants remove heat generated by rubbing. Lubricants must not be melted, as the solid will lose strength and distort or be removed like liquid. Tensile strength, compressibility, and hardness are significant mechanical qualities for solid lubricants in extreme conditions. This chapter discusses solid lubricants and their structure. Also discussed are solid lubricants’ mechanical and thermal properties. The lubricating mechanism and conclusion are also conferred.

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Konferenzberichte zum Thema "Binary Nitride"

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Huang, Xinfan, Wenqi Gao, Zhifeng Li, Xiaofeng Gu, Jin Zhou und Kun-Ji Chen. „Amorphous silicon nitride binary-phase optical elements“. In Thin Film Physics and Applications: Second International Conference, herausgegeben von Shixun Zhou, Yongling Wang, Yi-Xin Chen und Shuzheng Mao. SPIE, 1994. http://dx.doi.org/10.1117/12.190750.

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Chen, Huai-Yi, und Kuan-Chih Yeh. „High Performance Binary Blazed Polysilicon Grating Coupler with a Silicon Nitride Filling Layer“. In Frontiers in Optics. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/fio.2015.jw2a.67.

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Gonsalves, K. E., G. Carlson, S. P. Rangarajan, M. Benaissa und M. José-Yacamán. „Synthesis, Dispersion and Optical Properties of Nanostructured FCC Gallium Nitride“. In Chemistry and Physics of Small-Scale Structures. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/cps.1997.ctub.4.

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Binary III-V materials have recently attracted significant interest[1]. This is due to their high bandgap energy (3.1 - 3.8 eV) which makes them suitable for creating and processing blue light. Eventually, devices based on these materials will bring advances in the fields of communications and computing. However, most of the research on III-Vs has concentrated on vapor-deposited solid films. Interest has also been focused [2] on materials with large third-order nonlinear optical susceptibility.

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Ershov, A., und A. Kamenetskikh. „Diagnostics of a low-pressure arc plasma (N2, 0.1–1 Pa) in the mode of aluminum anodic evaporation“. In 8th International Congress on Energy Fluxes and Radiation Effects. Crossref, 2022. http://dx.doi.org/10.56761/efre2022.c4-o-023502.

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The use of an arc with a thermionic cathode burning in vapors of the anode material for the coating deposition provides high deposition rates, a controlled level of ion assistance, and the absence of microdroplets characteristic of a cathode arc. The use for this purpose of a low-pressure arc with a self-heating hollow cathode makes it possible to use an active gaseous medium for the synthesis of binary coatings, for example, nitride or oxide coatings. The rate of deposition of such coatings, their structure, and properties depend on such parameters of the discharge plasma as the plasma density and its electron temperature, the anode potential drop, the mass composition of the plasma, the degree of vapor ionization, and the degree of reactive gas dissociation. In this work, to diagnose the discharge plasma, probe diagnostics and optical emission spectroscopy were used. The results of measurements obtained in wide ranges of discharge current (5–30 A), reactive gas pressure (N2, 0.1–1 Pa), and evaporation rate of Al ((1.4–18)·10-5 g/cm2·s) are presented.

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Coscia, Kevin, Sudhakar Neti, Alparslan Oztekin, Spencer Nelle, Satish Mohapatra und Tucker Elliott. „The Thermophysical Properties of the NaNO3-KNO3, LiNO3-NaNO3, and LiNO3-KNO3 Systems“. In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64465.

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The present work comprises of thermophysical properties of nitrate-based binary heat transfer fluids of various compositions. For various nitrate mixtures, specific heat, latent heat of fusion, and viscosity as a function of shear rate are reported at various temperatures. Phase diagrams have also been constructed for these binary mixtures using differential scanning calorimetry. It was found that the contribution of the lithium nitrate on the binary mixtures had the largest increase in specific heat. As with most fluids, viscosity significantly decreases with temperature. The latent heat of the binary mixtures cannot be determined by using simple mass-averaging. The results presented in this work are expected to make a significant impact on the development of economical and industrially viable nitrate mixtures for solar power applications.

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Sahoo, B. K. „The macroscopic polarization and wurtzite binary nitrides“. In 3RD INTERNATIONAL CONFERENCE ON FUNDAMENTAL AND APPLIED SCIENCES (ICFAS 2014): Innovative Research in Applied Sciences for a Sustainable Future. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4898515.

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Kruizenga, Alan, David Gill und Marianne LaFord. „Corrosion of Austenitic Alloys in Binary 60/40 Nitrate Salt at 600°C“. In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18057.

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Industrial power utilities are using molten binary nitrate salt as a heat transfer fluid and thermal storage media for solar energy generation. Currently, the maximum bulk temperature is 565°C, due to concerns of salt degradation and materials compatibility with containment vessels. To increase overall cycle efficiency, one must increase the upper temperature of the nitrate salt, thereby lowering the levelized cost of electricity (LCoE) through higher power cycle efficiency. The corrosion performance of 316 stainless steel and Inconel 625 is currently characterized at 600°C. However, the 316SS has exhibited stress corrosion cracking (thought due to aqueous flush in Solar Two [1]), and while In625 performs well, its cost is prohibitive. Therefore, current research seeks to evaluate heat-resistant austenitic alloys for use with nitrate salts, ascertaining if they have superior performance characteristics, as well as assessing their mechanisms of corrosion. Sandia National Laboratory is researching four alloys (S35140, ATI332Mo, RA330, and HA556) for corrosion performance at 600°C for 3000 hours, under a cover gas of air. Air is used to simulate the chemistry conditions expected in a power plant. This work details the corrosion rate and the oxide structure for each alloy. Research indicates all alloys are very corrosion-resistant, with metal loss rates projected to be less than 21μm/year after 3000 hours. Though all alloys performed well, corrosion rate data for RA330 (Fe-19Cr-35Ni + minor elements) currently appears to exhibit a linear loss mechanism. In conclusion, this paper will explore the differences in oxide formation between these similar alloys.

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Ivol, Flavien, Johan Jacquemin und Fouad Ghamouss. „Binary Mixtures of Ionic Liquids (Ils) and Aliphatic Nitrile Solvents as Electrolytes for Supercapacitors“. In 10TH International Conference on Sustainable Energy and Environmental Protection. University of Maribor Press, 2017. http://dx.doi.org/10.18690/978-961-286-052-3.11.

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Moreno-Quintanar, G., W. Rivera und R. Best. „Experimental Evaluation of a Solar Intermittent Refrigerator Working With the Mixtures NH3 – LiNO3 and NH3 – LiNO3 – H2O“. In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54421.

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Solar energy could help to reduce the request of electric energy which is generated via hydrocarbons, having the possibility to provide energy to rural communities which do not have it through the conventional distribution. The application of solar system on refrigeration has a great range of development, that will have a competitive cost when the hydrocarbons diminish. An intermittent solar refrigerator that works with the absorption cycle is studied in the Center of Research on Energy of UNAM. It was designed to produce 8 kg of ice. The refrigerator consists of a condenser, an expansion valve, an evaporator and a generator/absorber. A compound parabolic concentrator (CPC) receives solar energy and turns into thermal energy. It is concentrated in the cylindrical receiver that works as generator or absorber. Being intermittent, the refrigerator performs two stages to complete a refrigeration cycle: a generation-condensation stage and another of evaporation-absorption stage. The present work focuses on the evaluation of the generation-condensation stage. One of the working mixture is ammonia-lithium nitrate (NH3 – LiNO3) that presents some advantages over the common mixtures such as the avoiding of rectification and working with relatively low manometric pressures. A disadvantage is that it presents crystallization at low concentrations. The other working mixture is ammonia-lithium nitrate-water (NH3 – LiNO3 – H2O) with higher conductivity and lower viscosity than the ammonia/lithium nitrate. Several test were made at different solution concentrations for both mixtures, binary mixture (NH3 – LiNO3) and ternary mixture (NH3 – LiNO3 – H2O). Comparing the performance of the system operating with the two mixtures, it was found that with the ternary mixture the solar coefficients of performance can be up to 24% higher than those obtained with the binary mixture.

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Sahoo, S. K., B. K. Sahoo und S. Sahoo. „The effect of spontaneous and piezoelectric polarization on phonon relaxation rates in binary wurtzite nitrides“. In PROCEEDING OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN APPLIED PHYSICS AND MATERIAL SCIENCE: RAM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4810572.

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Berichte der Organisationen zum Thema "Binary Nitride"

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Kruizenga, Alan, David Gill und Marianne LaFord. Materials corrosion of high temperature alloys immersed in 600C binary nitrate salt. Office of Scientific and Technical Information (OSTI), März 2013. http://dx.doi.org/10.2172/1088090.

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Anderson, Gerald L., und Kalman Peleg. Precision Cropping by Remotely Sensed Prorotype Plots and Calibration in the Complex Domain. United States Department of Agriculture, Dezember 2002. http://dx.doi.org/10.32747/2002.7585193.bard.

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This research report describes a methodology whereby multi-spectral and hyperspectral imagery from remote sensing, is used for deriving predicted field maps of selected plant growth attributes which are required for precision cropping. A major task in precision cropping is to establish areas of the field that differ from the rest of the field and share a common characteristic. Yield distribution f maps can be prepared by yield monitors, which are available for some harvester types. Other field attributes of interest in precision cropping, e.g. soil properties, leaf Nitrate, biomass etc. are obtained by manual sampling of the filed in a grid pattern. Maps of various field attributes are then prepared from these samples by the "Inverse Distance" interpolation method or by Kriging. An improved interpolation method was developed which is based on minimizing the overall curvature of the resulting map. Such maps are the ground truth reference, used for training the algorithm that generates the predicted field maps from remote sensing imagery. Both the reference and the predicted maps are stratified into "Prototype Plots", e.g. 15xl5 blocks of 2m pixels whereby the block size is 30x30m. This averaging reduces the datasets to manageable size and significantly improves the typically poor repeatability of remote sensing imaging systems. In the first two years of the project we used the Normalized Difference Vegetation Index (NDVI), for generating predicted yield maps of sugar beets and com. The NDVI was computed from image cubes of three spectral bands, generated by an optically filtered three camera video imaging system. A two dimensional FFT based regression model Y=f(X), was used wherein Y was the reference map and X=NDVI was the predictor. The FFT regression method applies the "Wavelet Based", "Pixel Block" and "Image Rotation" transforms to the reference and remote images, prior to the Fast - Fourier Transform (FFT) Regression method with the "Phase Lock" option. A complex domain based map Yfft is derived by least squares minimization between the amplitude matrices of X and Y, via the 2D FFT. For one time predictions, the phase matrix of Y is combined with the amplitude matrix ofYfft, whereby an improved predicted map Yplock is formed. Usually, the residuals of Y plock versus Y are about half of the values of Yfft versus Y. For long term predictions, the phase matrix of a "field mask" is combined with the amplitude matrices of the reference image Y and the predicted image Yfft. The field mask is a binary image of a pre-selected region of interest in X and Y. The resultant maps Ypref and Ypred aremodified versions of Y and Yfft respectively. The residuals of Ypred versus Ypref are even lower than the residuals of Yplock versus Y. The maps, Ypref and Ypred represent a close consensus of two independent imaging methods which "view" the same target. In the last two years of the project our remote sensing capability was expanded by addition of a CASI II airborne hyperspectral imaging system and an ASD hyperspectral radiometer. Unfortunately, the cross-noice and poor repeatability problem we had in multi-spectral imaging was exasperated in hyperspectral imaging. We have been able to overcome this problem by over-flying each field twice in rapid succession and developing the Repeatability Index (RI). The RI quantifies the repeatability of each spectral band in the hyperspectral image cube. Thereby, it is possible to select the bands of higher repeatability for inclusion in the prediction model while bands of low repeatability are excluded. Further segregation of high and low repeatability bands takes place in the prediction model algorithm, which is based on a combination of a "Genetic Algorithm" and Partial Least Squares", (PLS-GA). In summary, modus operandi was developed, for deriving important plant growth attribute maps (yield, leaf nitrate, biomass and sugar percent in beets), from remote sensing imagery, with sufficient accuracy for precision cropping applications. This achievement is remarkable, given the inherently high cross-noice between the reference and remote imagery as well as the highly non-repeatable nature of remote sensing systems. The above methodologies may be readily adopted by commercial companies, which specialize in proving remotely sensed data to farmers.

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