Download or read book Intrinsic Studies of Materials Sintering Mechanisms of Defect Oxides written by D. Lynn Johnson and published by . This book was released on 1972 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes an investigation of the influence of deviations from stoichiometry on the sintering of the defect oxide, CoO. The eleven conclusions reached in this investigation are listed in this report and among them are: (1) CoO sinters according to volume diffusion kinetics in the initial and intermediate stages, (2) The sintering rate is increased with increasing oxygen partial pressure above 0.001 atmosphere, (3) The calculated volume diffusion coefficients lie between the tracer values for Co and O in single crystals. (Author).

Download or read book Research in Progress written by and published by . This book was released on 1971 with total page 834 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 1991 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Defect Design Chemical Synthesis and Associated Properties of Multifunctional Tio2 based Nanocrystals written by Qingbo Sun and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Local defect structures are significant to determine material properties since defects introduced into host materials would affect the local/average crystal environments and thus lead to a change of macroscopic physicochemical performances. The intentional design of specific local defects not only depends on the selected synthesis method and preparation process but also relies on the selected dopant or co-dopant ions. A deep understanding of the intrinsic relationships between local defect structures, chemical synthesis and associated properties is thought as one major framework of material genome plan. It also pushes the design, development and application of novel multifunctional materials. Based on local defect structural design coupled with new synthesis strategies, indium and niobium co-doped anatase titanium oxide nanocrystals are synthesized. It is experimentally demonstrated that the dual mechanisms of nucleation and diffusion doping are responsible for the synergistic incorporation of indium difficult-dopants and niobium easy-dopants, and theoretically evidenced that the local defect structures created by indium, niobium co-dopants, reduced titanium and oxygen vacancies are composed of defect clusters and defect pairs. These introduced local defect structures act as nucleation centres of baddeleyite- and lead oxide-like metastable polymorphic phases and induce an abnormal trans-regime structural transition of co-doped anatase titanium oxide nanocrystals under high pressure. Furthermore, these small co-doped nanocrystals can be used as raw materials to manufacture titania-based ceramic capacitors designed in terms of electron-pinned defect dipole mechanism. The sintering temperature is thus lowered to 1200°C, which conquers the technological bottleneck using this material. To develop the third generation of high-efficient visible light catalysts, nitrogen and niobium co-doped anatase titania nanocrystals are synthesized. Experimental and theoretical investigations demonstrate that the formation of highly concentrated defect-pairs is key to significantly enhance visible light catalytic efficiency. In further combination of local defect structural design and the exploration of new synthesis strategies, anatase nanocrystals containing nitrogen and reduced titanium ions are synthesized. The formation of local defect clusters is demonstrated to play an important role on the obvious enhancement of Rhodamine B degradation efficiency under only visible light illumination. It is thus unveiled that a fundamental understanding of the functions of local defect structures and a well-controlled synthetic strategy are critical to develop highly efficient visible light catalysts with unprecedented photocatalytic performances. Through these systematic investigations, it is concluded that local defect structures generated by introduced co-dopants are complicated in strong-correlated titania systems and differ from case to case. A major difficulty to efficiently introduce difficult-dopant ions such as nitrogen and indium at high concentrations is solved. Two high-efficient visible light catalysts are achieved for environmental remediation by using the clean and renewable solar energy; and one raw material for manufacturing new ceramic capacitors and new metastable polymorphic phases is provided. The discussion on the doping mechanisms, the defect formation and their associated impacts on material performances will not only benefit the future development of physical chemistry, material science and defect chemistry, but also opens a new route to design novel multifunctional materials based on local defect structure design.

Download or read book Government Reports Index written by and published by . This book was released on 1972 with total page 1126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1972-08-25 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spark Plasma Sintering Current Status New Developments and Challenges written by Giacomo Cao and published by Elsevier. This book was released on 2019-06-17 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spark Plasma Sintering: Current Status, New Developments and Challenges: A Review of the Current Trends in SPS looks at the progress made in the field of SPS. It includes a review of the scientific mechanisms, materials synthesis and industry applications for this processing technique. Chapters are written by leading experts in the field, encompassing topics surrounding the densification mechanism and microstructure evolution, the classification of high-performance materials, a review of numerical simulation, discussions of new technology advances, such as HP-SPS, flash sintering and related challenges. This book will be useful for researchers, engineers and students within the materials science and engineering fields. Provides significant information on the most relevant research topics currently being addressed by the SPS community Highlights the application of SPS techniques Reviews critical issues that still need to be overcome when utilizing SPS technology

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1994-06 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Modelling of Nanomaterials written by Panagiotis Grammatikopoulos and published by Elsevier. This book was released on 2020-09-30 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to their small size and their dependence on very fast phenomena, nanomaterials are ideal systems for computational modelling. This book provides an overview of various nanosystems classified by their dimensions: 0D (nanoparticles, QDs, etc.), 1D (nanowires, nanotubes), 2D (thin films, graphene, etc.), 3D (nanostructured bulk materials, devices). Fractal dimensions, such as nanoparticle agglomerates, percolating films and combinations of materials of different dimensionalities are also covered (e.g. epitaxial decoration of nanowires by nanoparticles, i.e. 0D+1D nanomaterials). For each class, the focus will be on growth, structure, and physical/chemical properties. The book presents a broad range of techniques, including density functional theory, molecular dynamics, non-equilibrium molecular dynamics, finite element modelling (FEM), numerical modelling and meso-scale modelling. The focus is on each method’s relevance and suitability for the study of materials and phenomena in the nanoscale. This book is an important resource for understanding the mechanisms behind basic properties of nanomaterials, and the major techniques for computational modelling of nanomaterials. Explores the major modelling techniques used for different classes of nanomaterial Assesses the best modelling technique to use for each different type of nanomaterials Discusses the challenges of using certain modelling techniques with specific nanomaterials

Download or read book Green Sustainable Process for Chemical and Environmental Engineering and Science written by Rajender Boddula and published by Elsevier. This book was released on 2021-03-18 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green Sustainable Process for Chemical and Environmental Engineering and Science: Solid State Synthetic Methods cover recent advances made in the field of solid-state materials synthesis and its various applications. The book provides a brief introduction to the topic and the fundamental principles governing the various methods. Sustainable techniques and green processes development in solid-state chemistry are also highlighted. This book also provides a comprehensive literature on the industrial application using solid-state materials and solid-state devices. Overall, this book is intended to explore green solid-state techniques, eco-friendly materials involved in organic synthesis and real-time applications. Provides a broad overview of solid-state chemistry Outlines an eco-friendly solid-state synthesis of modern nanomaterials, organometallic, coordination compounds and pure organic Gives a detailed account of solid-state chemistry, fundamentals, concepts, techniques and applications Deliberates cutting-edge recent advances in industrial technologies involved in energy, environmental, medicinal and organic chemistry fields

Download or read book Advances in Sintering Science and Technology II written by Suk-Joong L. Kang and published by John Wiley & Sons. This book was released on 2012-09-19 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides an excellent one-stop resource for understanding the most important current issues in the research and advances in sintering science and technology.

Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sintering Technology written by Randall M. German and published by CRC Press. This book was released on 2020-09-30 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the sintering conference held at the Pennsylvania State University, USA, this text presents advances in the application of sintering to the most important industrial materials. It offers results on both solid-state and microphase sintering as well as microstructure evolution, and introduces new applications, processes, materials and solutions to technical problems.

Download or read book Annual Review of Materials Science written by Elton N. Kaufmann and published by . This book was released on 1995 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Materials Coordinating Committe EMaCC Fiscal Year 2002 Annual Technical Report written by and published by DIANE Publishing. This book was released on with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1988 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt: