Synthesis of New Ternary Nitrides PDF Download
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Author: David Stanley Bem
Publisher:
ISBN:
Category :
Languages : en
Pages : 508
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Book Description
Author: David Stanley Bem
Publisher:
ISBN:
Category :
Languages : en
Pages : 508
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Author: Paul E. Rauch
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
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Author: Deborah A. Vennos
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
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Book Description
We have synthesized a new ternary nitride, Ca3CrN3 (calcium chromium nitride), from the binary nitrides at high temperature. The refined structure was solved in the Cmcm space group with lattice constants a=8.503(2), b=10.284(2), c=5.032(1), and R=3.9%, R(w)=3.9%. This new structure type consists of sheets of (CrN3)6( - ) planar triangular units and calcium ions. Ca3CrN3 is insulating and paramagnetic with Cr3(+) in the low spin state. This is the first unambiguous example of low spin Cr3(+). Larger than expected antiferromagnetic interactions produce a maximum in the magnetic susceptibility at 245K, even though the shortest Cr-Cr distance is 4.73A. Solid state nitrides, Crystal structure, Magnetic properties, Low dimensional compounds, Triangular planar units, Paramagnetic insulator, Solid state chemistry. (jg).
Author:
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Category :
Languages : en
Pages : 23
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We have synthesized a new ternary nitride, Ca3VN3, from the binary nitrides at high temperature. The refined structure was solved in the P21 sub 1/ m space group with lattice constants a=6.717 (2), b=5.064 (2), c=6.720 (3), Beta=78.88 (3), Z=2, and R=3.2%, Rw=3.7%. The structure is related to the recently reported A3MN3 compounds (1) with sheets of (VN3)6- trigonal planar units and calcium ions. Ca3VN3 is insulating with V(3+) in the low-spin state, S=0.
Author: Syed Imran Ullah Shah
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Ming-Yau Chern
Publisher:
ISBN:
Category :
Languages : en
Pages : 334
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Author: S.T. Oyama
Publisher: Springer Science & Business Media
ISBN: 9400915659
Category : Science
Languages : en
Pages : 565
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Book Description
This book arose from a symposium titled 'Transition Metal Carbides and Nitrides: Preparation, Properties, and Reactivity' organized by Jae Sung Lee, Masatoshi Nagai and myself. The symposium was part of the 1995 Congress of Pacific Rim Chemical Societies, held in Honolulu, Hawaii between December 17-22, 1995. The meeting was the first major conference to exclusively address the theme of metal carbides and nitrides, and brought together many of the major researchers in the field. Over 50 scientists and engineers reported their latest findings in five sessions of presentations and discussions. The book closely follows the topics covered in the conference: Theory of bonding Structure and composition Catalytic properties Physical properties New methods of preparation Spectroscopy and microscopy The book is unique in its coverage. It provides a general introduction to the properties and nature of the materials, but also covers their latest applications in a wide variety of fields. It should thus be of interest to both experts and nonexperts in the fields of material science, solid-state chemistry, physics, ceramics engineering, and catalysis. The first chapter gives an overview, and many of the chapters provide summaries of advanced topics. All contributions were peer-reviewed.
Author: Paul Martin O'Meara
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Amy Bowman
Publisher:
ISBN:
Category : Nitrides
Languages : en
Pages : 488
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Author: Huazhang Liu
Publisher: World Scientific
ISBN: 9814518808
Category : Science
Languages : en
Pages : 895
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Book Description
This book provides a review of worldwide developments in ammonia synthesis catalysts over the last 30 years. It focuses on the new generation of Fe1-xO based catalysts and ruthenium catalysts — both are major breakthroughs for fused iron catalysts. The basic theory for ammonia synthesis is systematically explained, covering topics such as the chemical components, crystal structure, preparation, reduction, performance evaluation, characterization of the catalysts, the mechanism and kinetics of ammonia synthesis reaction. Both theory and practice are combined in this presentation, with emphasis on the research methods, application and exploitation of catalysts.The comprehensive volume includes an assessment of the economic and engineering aspects of ammonia plants based on the performance of catalysts. Recent developments in photo-catalysis, electro-catalysis, biocatalysis and new uses of ammonia are also introduced in this book.The author, Professor Huazhang Liu, has been engaged in research and practice for more than 50 years in this field and was the inventor of the first Fe1-xO based catalysts in the world. He has done a lot of research on Fe3O4 based- and ruthenium based-catalysts, and has published more than 300 papers and obtained 21 patents during his career.
