Synthesis of Yttria-Stabilized Zirconia Aerogels by a Non-Alkoxide Sol-Gel Route PDF Download
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Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
Homogeneous, nanocrystalline powders of yttria-stabilized zirconia were prepared using a nonalkoxide sol-gel method. Monolithic gels, free of precipitation, were prepared by addition of propylene oxide to aqueous solutions of Zr{sup 4+} and Y{sup 3+} chlorides at room temperature. The gels were dried with supercritical CO2(l), resulting in amorphous aerogels that crystallized into cubic stabilized ZrO2 following calcination at 500 C. The aerogels and resulting crystalline products were characterized using in-situ temperature profile X-ray diffraction, thermal analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and nitrogen adsorption/desorption analysis. TEM and N2 adsorption/desorption analysis of an aerogel indicated a porous network structure with a high surface area (409 m2/g). The crystallized yttria-stabilized zirconia maintained high surface area (159 m2/g) upon formation of homogeneous, nanoparticles (≈10 nm). Ionic conductivity at 1000 C of sintered YSZ (1500 C, 3 hours) prepared by this method, was 0.13 ± 0.02?−1 cm−1. Activation energies for the conduction processes from 1000-550 C and 550-400 C, were 0.95 ± 0.09 and 1.12 ± 0.05 eV, respectively. This is the first reported synthesis and characterization of yttria-stabilized zirconia via an aerogel precursor.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
Homogeneous, nanocrystalline powders of yttria-stabilized zirconia were prepared using a nonalkoxide sol-gel method. Monolithic gels, free of precipitation, were prepared by addition of propylene oxide to aqueous solutions of Zr{sup 4+} and Y{sup 3+} chlorides at room temperature. The gels were dried with supercritical CO2(l), resulting in amorphous aerogels that crystallized into cubic stabilized ZrO2 following calcination at 500 C. The aerogels and resulting crystalline products were characterized using in-situ temperature profile X-ray diffraction, thermal analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and nitrogen adsorption/desorption analysis. TEM and N2 adsorption/desorption analysis of an aerogel indicated a porous network structure with a high surface area (409 m2/g). The crystallized yttria-stabilized zirconia maintained high surface area (159 m2/g) upon formation of homogeneous, nanoparticles (≈10 nm). Ionic conductivity at 1000 C of sintered YSZ (1500 C, 3 hours) prepared by this method, was 0.13 ± 0.02?−1 cm−1. Activation energies for the conduction processes from 1000-550 C and 550-400 C, were 0.95 ± 0.09 and 1.12 ± 0.05 eV, respectively. This is the first reported synthesis and characterization of yttria-stabilized zirconia via an aerogel precursor.
Author: Michel Andre Aegerter
Publisher: Springer Science & Business Media
ISBN: 1441975896
Category : Technology & Engineering
Languages : en
Pages : 929
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Book Description
Aerogels are the lightest solids known. Up to 1000 times lighter than glass and with a density as low as only four times that of air, they show very high thermal, electrical and acoustic insulation values and hold many entries in Guinness World Records. Originally based on silica, R&D efforts have extended this class of materials to non-silicate inorganic oxides, natural and synthetic organic polymers, carbon, metal and ceramic materials, etc. Composite systems involving polymer-crosslinked aerogels and interpenetrating hybrid networks have been developed and exhibit remarkable mechanical strength and flexibility. Even more exotic aerogels based on clays, chalcogenides, phosphides, quantum dots, and biopolymers such as chitosan are opening new applications for the construction, transportation, energy, defense and healthcare industries. Applications in electronics, chemistry, mechanics, engineering, energy production and storage, sensors, medicine, nanotechnology, military and aerospace, oil and gas recovery, thermal insulation and household uses are being developed with an estimated annual market growth rate of around 70% until 2015. The Aerogels Handbook summarizes state-of-the-art developments and processing of inorganic, organic, and composite aerogels, including the most important methods of synthesis, characterization as well as their typical applications and their possible market impact. Readers will find an exhaustive overview of all aerogel materials known today, their fabrication, upscaling aspects, physical and chemical properties, and most recent advances towards applications and commercial products, some of which are commercially available today. Key Features: •Edited and written by recognized worldwide leaders in the field •Appeals to a broad audience of materials scientists, chemists, and engineers in academic research and industrial R&D •Covers inorganic, organic, and composite aerogels •Describes military, aerospace, building industry, household, environmental, energy, and biomedical applications among others
Author: Michel A. Aegerter
Publisher: Springer Nature
ISBN: 3030273229
Category : Technology & Engineering
Languages : en
Pages : 1778
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Book Description
This indispensable handbook provides comprehensive coverage of the current state-of-the-art in inorganic, organic, and composite aerogels – from synthesis and characterization to cutting-edge applications and their potential market impact. Built upon Springer’s successful Aerogels Handbook published in 2011, this handbook features extensive revisions and timely updates, reflecting the changes in this fast-growing field. Aerogels are the lightest solids known to man. Up to 1000 times lighter than glass and with a density only four times that of air, they possess extraordinarily high thermal, electrical, and acoustic insulation properties, and boast numerous entries in Guinness World Records. Originally based on silica, R&D efforts have extended this class of materials to incorporate non-silicate inorganic oxides, natural and synthetic organic polymers, carbon, metal, and ceramic materials. Composite systems involving polymer-crosslinked aerogels and interpenetrating hybrid networks have been developed and exhibit remarkable mechanical strength and flexibility. Even more exotic aerogels based on clays, chalcogenides, phosphides, quantum dots, and biopolymers such as chitosan are opening new applications for the construction, transportation, energy, defense and healthcare industries. Applications in electronics, chemistry, mechanics, engineering, energy production and storage, sensors, medicine, nanotechnology, military and aerospace, oil and gas recovery, thermal insulation, and household uses are being developed. Readers of this fully updated and expanded edition will find an exhaustive source for all aerogel materials known today, their fabrication, upscaling aspects, physical and chemical properties, and the most recent advances towards applications and commercial use. This key reference is essential reading for a combined audience of graduate students, academic researchers, and industry professionals.
Author: Meldin Mathew
Publisher: John Wiley & Sons
ISBN: 1119717655
Category : Technology & Engineering
Languages : en
Pages : 548
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Book Description
Explore the energy storage applications of a wide variety of aerogels made from different materials In Aerogels for Energy Saving and Storage, an expert team of researchers delivers a one-stop resource covering the state-of-the-art in aerogels for energy applications. The book covers their morphology, properties, and processability and serves as a valuable resource for researchers and professionals working in materials science and environmentally friendly energy and power technology. The authors offer a comprehensive review of highly efficient energy applications of aerogels that bridges the gap between engineering, science, and chemistry and advances the field of materials development. They provide a Life Cycle Assessment of aerogels in energy systems, as well as discussions of their impact on the environment. Aerogel synthesis, characterization, fabrication, morphology, properties, energy-related applications, and simulations are all explored, and likely future research directions are provided. Readers will also find: A thorough introduction to aerogels in energy, including state-of-the-art advancements and challenges newly encountered Comprehensive explorations of chitin-based and cellulose-derived aerogels, as well as lignin-, clay-, and carbon nanotube-based aerogels Practical discussions of organic, natural, and inorganic aerogels, with further analyses of the lifecycle of aerogels In-depth examinations of the theory, modeling, and simulation of aerogels Perfect for chemical and environmental engineers, Aerogels for Energy Saving and Storage will also earn a place in the libraries of chemistry and materials science researchers in academia and industry.
Author: Ling Zang
Publisher: Springer Science & Business Media
ISBN: 0857296388
Category : Technology & Engineering
Languages : en
Pages : 937
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Book Description
Reflecting the rapid growth of nanotechnology research and the potential impact of the growing energy crisis, Energy Efficiency and Renewable Energy Through Nanotechnology provides comprehensive coverage of cutting-edge research in the energy-related fields of nanoscience and nanotechnology, which aim to improve energy efficiency and the generation of renewable energy. Energy Efficiency and Renewable Energy Through Nanotechnology tightly correlates nanotechnology with energy issues in a general, comprehensive way that makes it not only suitable as a desk reference for research, but also as a knowledge resource for the non-expert general public. Readers will find Energy Efficiency and Renewable Energy Through Nanotechnology useful in a variety of ways, ranging from the creation of energy policy, to energy research development, and to education in nanotechnology and its application to energy-related problems. It can also be used as a primary or supplementary textbook for energy-related courses for advanced undergraduate and graduate students.
Author: David Levy
Publisher: John Wiley & Sons
ISBN: 3527334866
Category : Technology & Engineering
Languages : en
Pages : 1604
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Book Description
This comprehensive three-volume handbook brings together a review of the current state together with the latest developments in sol-gel technology to put forward new ideas. The first volume, dedicated to synthesis and shaping, gives an in-depth overview of the wet-chemical processes that constitute the core of the sol-gel method and presents the various pathways for the successful synthesis of inorganic and hybrid organic-inorganic materials, bio- and bio-inspired materials, powders, particles and fibers as well as sol-gel derived thin films, coatings and surfaces. The second volume deals with the mechanical, optical, electrical and magnetic properties of sol-gel derived materials and the methods for their characterization such as diffraction methods and nuclear magnetic resonance, infrared and Raman spectroscopies. The third volume concentrates on the various applications in the fields of membrane science, catalysis, energy research, biomaterials science, biomedicine, photonics and electronics.
Author: Aftab Aslam Parwaz Khan
Publisher: Elsevier
ISBN: 0128208988
Category : Science
Languages : en
Pages : 398
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Book Description
Advances in Aerogel Composites for Environmental Remediation presents both contextual information aboutaerogels and details about their application in environmental remediation. A wide variety of aerogels are discussed, rangingfrom common to advanced and from natural to synthetic. By exploring ongoing research and developments in the environmentalremediation technologies using aerogel and its composites, this book addresses common day-to-day environmental problemsand presents solutions to the use of aerogel materials. The chapters discuss fabrication of various aerogel composites, alongwith their design and applications toward different environmental remediation technologies. Additionally, the properties andadvantages of aerogels are compared and contrasted to those of traditional materials. Given the consistent increase in environmental pollution, there is an urgent need to explore new materials for advances in remediationtechnology. Advances in Aerogel Composites for Environmental Remediation brings researchers and practitionersin the fields of environmental remediation, environmental science, and engineering to the forefront of remediation technologieswith a thorough breakdown of the benefits of and techniques relevant to aerogel composites. - Covers basic properties, unique properties, and fabrication techniques of aerogels, from basic silica aerogels topresent-day conventional aerogels - Discusses most of the major environmental remediation techniques and the advantages of using aerogels for theseremediation techniques in comparison to using traditional methods - Presents future prospects for utilizing aerogels in modern day-to-day life and in the fabrication of tangible new products
Author: Christopher N. Chervin
Publisher:
ISBN:
Category :
Languages : en
Pages : 414
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Book Description
Author: Paulo Mendonça
Publisher: Springer Nature
ISBN: 3031434781
Category : Science
Languages : en
Pages : 190
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Book Description
This book showcases the latest trends and innovations in the field of Green Building, covering topics from research and design to innovative practices and challenges. It is a compilation of communication papers presented at the 2023 International Conference on Green Building (ICoGB 2023), a leading annual event that focuses on sharing and discussing developments in this field. Green Building principles constitute key aspects to achieve the sustainable development goals. This conference is dedicated to providing a platform for researchers, scientists, engineers, and scholars to exchange and share their experiences, new ideas, and research and to discuss the challenges encountered as well as the solutions adopted. ICoGB 2023 was organized in Malmo, Sweden, during May 19–21, 2023. The target audience are all professionals in the building design and construction fields, such as architects, engineers, scholars, researchers, builders, promoters, among others.
Author: David Levy
Publisher: John Wiley & Sons
ISBN: 352767084X
Category : Technology & Engineering
Languages : en
Pages : 1616
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Book Description
This comprehensive three-volume handbook brings together a review of the current state together with the latest developments in sol-gel technology to put forward new ideas. The first volume, dedicated to synthesis and shaping, gives an in-depth overview of the wet-chemical processes that constitute the core of the sol-gel method and presents the various pathways for the successful synthesis of inorganic and hybrid organic-inorganic materials, bio- and bio-inspired materials, powders, particles and fibers as well as sol-gel derived thin films, coatings and surfaces. The second volume deals with the mechanical, optical, electrical and magnetic properties of sol-gel derived materials and the methods for their characterization such as diffraction methods and nuclear magnetic resonance, infrared and Raman spectroscopies. The third volume concentrates on the various applications in the fields of membrane science, catalysis, energy research, biomaterials science, biomedicine, photonics and electronics.
