Nuclear Magnetic Resonance Investigations of Structural Phase Transitions SiO2 Cristobalite and Tridymite and Related Phases PDF Download
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Author: Yuehui Xiao
Publisher:
ISBN:
Category :
Languages : en
Pages : 330
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Book Description
Author: Yuehui Xiao
Publisher:
ISBN:
Category :
Languages : en
Pages : 330
Get Book Here
Book Description
Author: Yuehui Xiao
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This thesis contributes to the application of nuclear magnetic resonance (NMR) techniques in studying structural phase transitions (SPT's) of the SiO$sb2$ cristobalite and SiO$sb2$ and AlPO$sb4$ tridymite polymorphs. The structural properties and SPT's of these phases have been of mineralogical, physical and industrial interest for decades. However, the microscopic characteristics of the SPT's and the origins of the commonly observed structural disorder in the high temperature phases have been poorly known. NMR techniques call provide important information concerning the temperature variation of the short-range structural parameters through SPT's. Moreover, the dynamical behavior of high temperature phases in the NMR frequency range ($sim$1-500 MHz) can sometimes be uniquely elucidated by relaxation rate measurements and spectral simulation. The work presented here includes in situ high temperature $sp{29}$Si, $sp{31}$P and $sp{27}$Al NMR results for cristobalite (Chapter II), chemically stabilized $beta$-cristobalite (Chapter III), various tridymite polymorphs (MC and PO, Chapter IV; MX-1 Chapter V; AlPO$sb4,$ Chapter VI) and a spin-lattice relaxation investigation of the dynamic properties for the high temperature SiO$sb2$ and AlPO$sb4$ tridymite phases (Chapter VII).
Author:
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Category : Dissertations, Academic
Languages : en
Pages : 984
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Author:
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ISBN:
Category : Powder metallurgy
Languages : en
Pages : 352
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An international journal of materials characterization.
Author: William Alexander Deer
Publisher: Geological Society of London
ISBN: 9781862391444
Category : Feldspathoid
Languages : en
Pages : 1016
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Description based on: v. 3, published in 2003.
Author: Peter J. Heaney
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501509691
Category : Science
Languages : en
Pages : 624
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Book Description
Volume 29 of Reviews in Mineralogy provides an updated silica review which focuses on the most recent developments. This book describes the crystal structures and phase transitions of silica and its stuffed derivatives; bridges the relationship between the microstructural character of real silica minerals and the behavior of silica in the geological environment; covers Quantum mechanical considerations of the Si-O bond; shows how calculations based upon first-principles theory can explain and predict silica transitions at high temperatures and pressures; covers spectroscopic analyses of silica and how they reveal vibrational behaviors in response to variations in temperature, pressure, and composition and finally details the uses of silica for industrial purposes.
Author: American Ceramic Society
Publisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 616
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Author: Gianfranco Pacchioni
Publisher: Springer Science & Business Media
ISBN: 9401009449
Category : Technology & Engineering
Languages : en
Pages : 619
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Silicon dioxide plays a central role in most contemporary electronic and photonic technologies, from fiber optics for communications and medical applications to metal-oxide-semiconductor devices. Many of these applications directly involve point defects, which can either be introduced during the manufacturing process or by exposure to ionizing radiation. They can also be deliberately created to exploit new technologies. This book provides a general description of the influence that point defects have on the global properties of the bulk material and their spectroscopic characterization through ESR and optical spectroscopy.
Author: Robert Browning Sosman
Publisher:
ISBN:
Category : Silica
Languages : en
Pages : 408
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Author:
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ISBN:
Category : Glass
Languages : en
Pages : 396
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