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Gallium Oxide

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Gallium Oxide

Gallium Oxide Book
Author : Masataka Higashiwaki,Shizuo Fujita
Publisher : Springer
Release : 2020-05-31
ISBN : 9783030371524
Language : En, Es, Fr & De

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Book Description :

This book provides comprehensive coverage of the new wide-bandgap semiconductor gallium oxide (Ga2O3). Ga2O3 has been attracting much attention due to its excellent materials properties. It features an extremely large bandgap of greater than 4.5 eV and availability of large-size, high-quality native substrates produced from melt-grown bulk single crystals. Ga2O3 is thus a rising star among ultra-wide-bandgap semiconductors and represents a key emerging research field for the worldwide semiconductor community. Expert chapters cover physical properties, synthesis, and state-of-the-art applications, including materials properties, growth techniques of melt-grown bulk single crystals and epitaxial thin films, and many types of devices. The book is an essential resource for academic and industry readers who have an interest in, or plan to start, a new R&D project related to Ga2O3.

Gallium Oxide

Gallium Oxide Book
Author : Stephen Pearton,Fan Ren,Michael Mastro
Publisher : Elsevier
Release : 2018-10-15
ISBN : 0128145226
Language : En, Es, Fr & De

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Book Description :

Gallium Oxide: Technology, Devices and Applications discusses the wide bandgap semiconductor and its promising applications in power electronics, solar blind UV detectors, and in extreme environment electronics. It also covers the fundamental science of gallium oxide, providing an in-depth look at the most relevant properties of this materials system. High quality bulk Ga2O3 is now commercially available from several sources and n-type epi structures are also coming onto the market. As researchers are focused on creating new complex structures, the book addresses the latest processing and synthesis methods. Chapters are designed to give readers a complete picture of the Ga2O3 field and the area of devices based on Ga2O3, from their theoretical simulation, to fabrication and application. Provides an overview of the advantages of the gallium oxide materials system, the advances in in bulk and epitaxial crystal growth, device design and processing Reviews the most relevant applications, including photodetectors, FETs, FINFETs, MOSFETs, sensors, catalytic applications, and more Addresses materials properties, including structural, mechanical, electrical, optical, surface and contact

Gallium Oxide

Gallium Oxide Book
Author : Masataka Higashiwaki,Shizuo Fujita
Publisher : Springer Nature
Release : 2020-04-23
ISBN : 3030371530
Language : En, Es, Fr & De

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Book Description :

This book provides comprehensive coverage of the new wide-bandgap semiconductor gallium oxide (Ga2O3). Ga2O3 has been attracting much attention due to its excellent materials properties. It features an extremely large bandgap of greater than 4.5 eV and availability of large-size, high-quality native substrates produced from melt-grown bulk single crystals. Ga2O3 is thus a rising star among ultra-wide-bandgap semiconductors and represents a key emerging research field for the worldwide semiconductor community. Expert chapters cover physical properties, synthesis, and state-of-the-art applications, including materials properties, growth techniques of melt-grown bulk single crystals and epitaxial thin films, and many types of devices. The book is an essential resource for academic and industry readers who have an interest in, or plan to start, a new R&D project related to Ga2O3.

Gallium Oxide

Gallium Oxide Book
Author : W. Morris
Publisher : Unknown
Release : 1965
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

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Rational Design of Mesoporous Gallium Oxide and Gallium based Mixed Oxide Catalysts

Rational Design of Mesoporous Gallium Oxide and Gallium based Mixed Oxide Catalysts Book
Author : Chinmay A. Deshmane
Publisher : Unknown
Release : 2011
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

In the present study, we report the synthesis of thermally stable mesoporous gallium oxide and novel gallium-niobium mixed oxides employing Evaporation Induced Self-Assembly (EISA), Self-Assembly Hydrothermal-Assisted (SAHA) and Self-Assembly Microwave-Assisted approaches. These methods offer the possibility to synthesize thermally stable mesoporous oxides with controlled morphological, textural and structural properties. EISA led to partially crystalline meso porous gallium oxide phases displaying unimodal pore size distribution in the ~2-5 nm range and surface areas as high as 300 m2/g. SAHA led to nanocrystalline mesoporous uniform micron-sized gallium oxide spheres (~0.3-6.5 11m) with narrow size distribution displaying cubic spinel type structure. These mesophases displayed surface areas as high as 220 m2/g and unimodal pore-size distribution in the 5-15 nm range. Microwave-assisted approach led to the formation of nanocrystalline mesoporous gallium oxide phases at low reaction temperature (l30°C) and short reaction times (~15-120 min). Novel semicrystalline mesoporous Gallium-Niobium mixed oxide phases were prepared via Self-Assembly Hydrothermal-Assisted (SAHA) method. This method led to the formation of uniform ~ 0.3-2 11m micron-sized mesoporous mixed gallium-niobium oxide spheres with narrow size distribution displaying surface areas as high as 360 m2/g and unimodal pore size distribution in the 3-6 nm range. Due to their high surface areas, tunability of pore sizes and their acidic nature these single phase and mixed mesoporous gallium-niobium oxides were employed as catalysts in the epoxidation of cyclooctene and isomerization of methyl oleate. For the epoxidation of cyclooctene to epoxycyclooctane carried out at 60°C the mesoporous gallium oxide displayed 100% selectivity towards epoxide with the conversion of cyclooctene in the 4 to 16% range. As the reaction temperature was increased to 80°C, an increase in the cyclooctene conversion was observed. The highest cyclooctene conversion observed was ~52% with a selectivity of 83% toward the epoxide. A clear correlation was observed between the cyclooctene conversion and gallium oxide particle size at both reaction conditions. Agglomerate size between 2-3 11m led to higher cyclooctene conversion, whereas the agglomerate sizes between 4.5-7.5 11m led to lower cyclooctene conversions. For the isomerisation of methyl oleate, highest conversion of 57% with the selectivity of 86% and yield of ~50% was observed over a sample with gallium-niobium composition of 0.3:0.7 wt%. The superior catalytic performance of the gallium-niobium mixed oxide was attributed to its high acidity, crystallinity and mesoporosity.

CRC Handbook of Metal Etchants

CRC Handbook of Metal Etchants Book
Author : Perrin Walker,William H. Tarn
Publisher : CRC Press
Release : 1990-12-11
ISBN : 9781439822531
Language : En, Es, Fr & De

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Book Description :

This publication presents cleaning and etching solutions, their applications, and results on inorganic materials. It is a comprehensive collection of etching and cleaning solutions in a single source. Chemical formulas are presented in one of three standard formats - general, electrolytic or ionized gas formats - to insure inclusion of all necessary operational data as shown in references that accompany each numbered formula. The book describes other applications of specific solutions, including their use on other metals or metallic compounds. Physical properties, association of natural and man-made minerals, and materials are shown in relationship to crystal structure, special processing techniques and solid state devices and assemblies fabricated. This publication also presents a number of organic materials which are widely used in handling and general processing...waxes, plastics, and lacquers for example. It is useful to individuals involved in study, development, and processing of metals and metallic compounds. It is invaluable for readers from the college level to industrial R & D and full-scale device fabrication, testing and sales. Scientific disciplines, work areas and individuals with great interest include: chemistry, physics, metallurgy, geology, solid state, ceramic and glass, research libraries, individuals dealing with chemical processing of inorganic materials, societies and schools.

Chemistry of Aluminium Gallium Indium and Thallium

Chemistry of Aluminium  Gallium  Indium and Thallium Book
Author : A.J. Downs
Publisher : Springer Science & Business Media
Release : 1993-05-31
ISBN : 9780751401035
Language : En, Es, Fr & De

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Book Description :

Boron has all the best tunes. That may well be the first impression of the Group 13 elements. The chemical literature fosters the impression not only in the primary journals, but also in asteady outflowofbooks focussing more or less closely on boron and its compounds. The same preoccupation with boron is apparent in the coverage received by the Group 13 elements in the comprehensive and regularly updated volume of the Gmelin Handbook. Yet such an imbalance cannot be explained by any inherent lack ofvariety, interest or consequence in the 'heavier elements. Aluminium is the most abundant metal in the earth's crust; in the industrialised world the metal is second only to iron in its usage, and its compounds can justifiably be said to touch our lives daily - to the potential detriment of those and other lives, some would argue. From being chemical curios, gallium and indium have now gained considerably prominence as sources of compound semiconductors like gallium arsenide and indium antimonide. Nor is there any want ofincident in the chemistriesofthe heavier Group 13 elements. In their redox, coordination and structural properties, there is to be found music indeed, notable not always for its harmony but invariably for its richness and variety. Thisbook seeks to redress the balance with a definitive, wide-rangingand up-to-date review of the chemistry of the Group 13 metals aluminium, gallium, indium and thallium.

I A Study of the Reduction of Gallium Oxide

I A Study of the Reduction of Gallium Oxide Book
Author : John Frederick Marshall White
Publisher : Unknown
Release : 1931
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download I A Study of the Reduction of Gallium Oxide book written by John Frederick Marshall White, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Gallium Oxide Thin Films for Optoelectronic Applications

Gallium Oxide Thin Films for Optoelectronic Applications Book
Author : Sundar Babu Isukapati
Publisher : Unknown
Release : 2018
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Gallium oxide (Ga2O3) belongs to the family of transparent conducting oxides (TCOs) which have emerged as attractive semiconductor material due their excellent properties. TCOs offer the combination of high conductivity along with excellent transparency in the visible region and a large direct band gap of 4.9 eV. These open the scope for applications for deep UV optical and high power/high voltage electronic device applications. The objective of this research was to fabricate high quality Ga2O3 thin films by magnetron sputtering which would be used to fabricate optoelectronic devices. The thin films were deposited on double polished c-plane sapphire substrates. Four investigations were conducted in order to optimize the quality of the thin films. First, the effect of using different Ar/O2 mixture for deposition was investigated. Second, the post deposition annealing was investigated where the films were annealed in vacuum and in different gas environments. Third, the effect of different substrate temperature from 20 °C to 800 °C was investigated. The fourth investigation was where different amounts of tin were introduced in order to perform n-type doping of the films. The structural and elemental compositional properties of the films were determined using x-ray diffraction and energy dispersive spectrometry measurements. ( ̄2 0 1 ) oriented [beta]-Ga2O3 single crystal thin films were obtained when deposited using 100 % Ar at 500 °C. The optical characteristics obtained by UV-VIS spectroscopy measurements showed excellent transmission of 90 - 95% and optical bandgaps of 4.7- 5.0 eV. Addition of tin dopants in the films produced a decrease in the optical bandgaps with increasing concentration of tin to the films.

Spectroscopy of Defects in Gallium Oxide

Spectroscopy of Defects in Gallium Oxide Book
Author : Jacob Rudolph Ritter
Publisher : Unknown
Release : 2019
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

[beta]-Gallium oxide ([beta]-Ga2O3) is a promising semiconductor for its potential as a material in the field of power electronics. Magnesium doping of Ga2O3 has been shown to create a semi-insulating material, which could be utilized in ultrahigh-power devices. The properties of iridium impurities in undoped, magnesium-doped, and calcium-doped gallium oxide were investigated with IR spectroscopy. In undoped and Ca-doped [beta]-Ga2O3, IR peaks at 3313, 3450, and 3500 cm-1 are tentatively assigned to O–H bond stretching modes of IrH complexes. Hydrogen-annealed Ga2O3:Mg shows an IR peak at 3492 cm-1, and H-annealed Ga2O3: Ca shows an IR peak at 3441 cm-1. These are assigned to an O-H bond-stretching mode of a neutral MgH and CaH complex, respectively. Polarization experiments were used to place the O-H bond of the MgH complex in the a-c plane. Mg, Ca, and Fe doped samples show an Ir4+ electronic transition feature at 5148 cm-1. By measuring the strength of this feature versus photoexcitation, the Ir3+/4+ donor level was determined to lie 2.2-2.3 eV below the conduction band minimum, which matches theory. Ga2O3:Mg also has a range of sidebands between 5100 and 5200 cm-1, attributed to IrMg pairs. Polarized IR measurements were used to show that the 5148 cm-1 peak is anisotropic, weakest for light polarized along the c axis.

NBS Monograph

NBS Monograph Book
Author : Anonim
Publisher : Unknown
Release : 1959
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Download NBS Monograph book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Metal Oxide Nanostructures as Gas Sensing Devices

Metal Oxide Nanostructures as Gas Sensing Devices Book
Author : G. Eranna
Publisher : Taylor & Francis
Release : 2016-04-19
ISBN : 1439863415
Language : En, Es, Fr & De

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Book Description :

Metal Oxide Nanostructures as Gas Sensing Devices explores the development of an integrated micro gas sensor that is based on advanced metal oxide nanostructures and is compatible with modern semiconductor fabrication technology. This sensor can then be used to create a compact, low-power, handheld device for analyzing air ambience. The book first covers current gas sensing tools and discusses the necessity for miniaturized sensors. It then focuses on the materials, devices, and techniques used for gas sensing applications, such as resistance and capacitance variations. The author addresses the issues of sensitivity, concentration, and temperature dependency as well as the response and recovery times crucial for sensors. He also presents techniques for synthesizing different metal oxides, particularly those with nanodimensional structures. The text goes on to highlight the gas sensing properties of many nanostructured metal oxides, from aluminum and cerium to iron and titanium to zinc and zirconium. The final chapters deal with existing and future devices that are based on nanostructures. Miniaturized systems that analyze air ambience need sensors capable of identifying different gaseous species. Exploring state-of-the-art gas sensing devices, this book shows how nanostructured metal oxides are ideally suited for use as gas sensing elements.

Growth and Characterization of Gallium Oxide Thin Films and Devices

Growth and Characterization of Gallium Oxide Thin Films and Devices Book
Author : Jorge Castillo
Publisher : Unknown
Release : 2017
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Growth and Characterization of Gallium Oxide Thin Films and Devices book written by Jorge Castillo, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Gallium Oxide Nanostructures for High Temperature Sensors

Gallium Oxide Nanostructures for High Temperature Sensors Book
Author : Anonim
Publisher : Unknown
Release : 2015
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Gallium oxide (Ga2O3) thin films were produced by sputter deposition by varying the substrate temperature (Ts) in a wide range (Ts=25-800 °C). The structural characteristics and electronic properties of Ga2O3 films were evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), Rutherford backscattering spectrometry (RBS) and spectrophotometric measurements. The effect of growth temperature is significant on the chemistry, crystal structure and morphology of Ga2O3 films. XRD and SEM analyses indicate that the Ga2O3 films grown at lower temperatures were amorphous while those grown at Ts≥500 oC were nanocrystalline. RBS measurements indicate the well-maintained stoichiometry of Ga2O3 films at Ts=300-800 °C. The electronic structure determination indicated that the nanocrystalline Ga2O3films exhibit a band gap of ~5 eV. Tungsten (W) incorporated Ga2O3 films were produced by co-sputter deposition. W-concentration was varied by the applied sputtering-power. No secondary phase formation was observed in W-incorporated Ga2O3 films. W-induced effects were significant on the structure and electronic properties of Ga2O3 films. The band gap of Ga2O3 films without W-incorporation was ~5 eV. Oxygen sensor characteristics evaluated using optical and electrical methods indicate a faster response in W-doped Ga2O3 films compared to intrinsic Ga2O3 films. The results demonstrate the applicability of both intrinsic and W-doped Ga-oxide films for oxygen sensor application at temperatures ≥700 °C.

Gallium Oxide

Gallium Oxide Book
Author : University of California, Berkeley. Radiation Laboratory
Publisher : Unknown
Release : 1965
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Gallium Oxide book written by University of California, Berkeley. Radiation Laboratory, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Processing and Properties of Advanced Ceramics and Composites II

Processing and Properties of Advanced Ceramics and Composites II Book
Author : Narottam P. Bansal,J. P. Singh,Jacques Lamon,Sung R. Choi,Morsi M. Mahmoud
Publisher : John Wiley & Sons
Release : 2010-10-01
ISBN : 0470930942
Language : En, Es, Fr & De

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Book Description :

Three international symposia “Innovative Processing and Synthesis of Ceramics, Glasses and Composites”, “Ceramic Matrix Composites”, and “Microwave Processing of Ceramics” were held during Materials Science & Technology 2009 Conference & Exhibition (MS&T’09), Pittsburgh, PA, October 25-29, 2009. These symposia provided an international forum for scientists, engineers, and technologists to discuss and exchange state-of-the-art ideas, information, and technology on advanced methods and approaches for processing, synthesis and characterization of ceramics, glasses, and composites. A total of 83 papers, including 20 invited talks, were presented in the form of oral and poster presentations. Authors from 19 countries (Austria, Belarus, Brazil, Bulgaria, Canada, China, Egypt, France, Germany, India, Iran, Italy, Japan, Russia, South Korea, Taiwan, Turkey, U.K., and the United States) participated. The speakers represented universities, industries, and government research laboratories.

Functional Oxide Based Thin Film Materials

Functional Oxide Based Thin Film Materials Book
Author : Dong-Sing Wuu
Publisher : MDPI
Release : 2020-05-29
ISBN : 3039288377
Language : En, Es, Fr & De

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Book Description :

This Special Issue on Functional Oxide-Based Thin-Film Materials touches on the latest advancements in several aspects related to material science: the synthesis of novel oxide, photoluminescence characteristics, photocatalytic ability, energy storage, light emitter studies, low-emissivity glass coatings, and investigations of both nanostructure and thin-film properties. It represents an amalgamation of specialists working with device applications and shedding light on the properties and behavior of thin-film oxides (e.g., GaOx, Ga2O3, HfO2, LiNbO3, and doped ZnO, among numerous others). The papers cover many aspects of thin-film science and technology, from thin film to nanostructure and from material properties to optoelectronic applications, thus reflecting the many interests of the community of scientists active in the field.

Exchange with Deuterium of Alkenes Catalysed by Gallium Oxide

Exchange with Deuterium of Alkenes Catalysed by Gallium Oxide Book
Author : Francis Brian Carleton
Publisher : Unknown
Release : 1972
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Exchange with Deuterium of Alkenes Catalysed by Gallium Oxide book written by Francis Brian Carleton, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.