Results 301 to 310 of about 291,400 (338)
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Journal of Sol-Gel Science and Technology, 1997
Sol-gel processes show many promises for the development of low-loss, high-performance glass integrated optical circuits. Special attention is being paid to the preparation of composite glass films, where the properties of organic or inorganic dopant compounds included in the glass matrix are fully exploited.
GC Righini, S Pelli
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Sol-gel processes show many promises for the development of low-loss, high-performance glass integrated optical circuits. Special attention is being paid to the preparation of composite glass films, where the properties of organic or inorganic dopant compounds included in the glass matrix are fully exploited.
GC Righini, S Pelli
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Journal of Non-Crystalline Solids, 1992
Sol-gel chemistry involves nucleophilic reactions. The chemical reactivity of metal alkoxides toward hydrolysis, condensation and complexation mainly depends on the electronegativity of the metal atom, its coordination number and the steric hindrance of alkoxide groups. Silicon alkoxides are poorly reactive. Hydrolysis and condensation rates have to be
J. Livage, C. Sanchez
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Sol-gel chemistry involves nucleophilic reactions. The chemical reactivity of metal alkoxides toward hydrolysis, condensation and complexation mainly depends on the electronegativity of the metal atom, its coordination number and the steric hindrance of alkoxide groups. Silicon alkoxides are poorly reactive. Hydrolysis and condensation rates have to be
J. Livage, C. Sanchez
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Solid State Ionics, 1992
Abstract The sol-gel synthesis of metal oxides offers new possibilities in the field of solid state ionics. The chemical design of molecular precursors allows a better control of the polymerization process so that taylor-made materials could be obtained.
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Abstract The sol-gel synthesis of metal oxides offers new possibilities in the field of solid state ionics. The chemical design of molecular precursors allows a better control of the polymerization process so that taylor-made materials could be obtained.
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2016
The sol–gel-based modification of wood introduces chemical substances into wood in order to improve its characteristics and impart new properties. It stabilizes dimensions of wood (timber) components, increases its strength and resistance to water, and reduces cracking. Many sol–gel-based impregnations aim to protect against wood rot and fire.
Thomas Hübert, Muhammad Shabir Mahr
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The sol–gel-based modification of wood introduces chemical substances into wood in order to improve its characteristics and impart new properties. It stabilizes dimensions of wood (timber) components, increases its strength and resistance to water, and reduces cracking. Many sol–gel-based impregnations aim to protect against wood rot and fire.
Thomas Hübert, Muhammad Shabir Mahr
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Current Opinion in Solid State and Materials Science, 1997
Abstract Sol-gel processes have long been used for the powderless processing of glasses and ceramics. Novel materials have appeared during the past few years with the synthesis of hybrid organic—inorganic compounds. Intermediate between glasses and polymers, these nanocomposites open up new possibilities in the field of materials science.
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Abstract Sol-gel processes have long been used for the powderless processing of glasses and ceramics. Novel materials have appeared during the past few years with the synthesis of hybrid organic—inorganic compounds. Intermediate between glasses and polymers, these nanocomposites open up new possibilities in the field of materials science.
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Chemie in unserer Zeit, 2017
ZusammenfassungDer Sol‐Gel‐Prozess zur Erzeugung von Materialien mit oxidischer Grundstruktur ist eine Methode, die handwerklich sehr einfach ist (mischen – warten – verarbeiten – trocknen), bei der aber detaillierte chemische Kenntnisse notwendig sind, wenn man die optimalsten Materialeigenschaften erzielen und alle Möglichkeiten ausschöpfen möchte ...
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ZusammenfassungDer Sol‐Gel‐Prozess zur Erzeugung von Materialien mit oxidischer Grundstruktur ist eine Methode, die handwerklich sehr einfach ist (mischen – warten – verarbeiten – trocknen), bei der aber detaillierte chemische Kenntnisse notwendig sind, wenn man die optimalsten Materialeigenschaften erzielen und alle Möglichkeiten ausschöpfen möchte ...
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2017
The use of sol-gel chemistry has afforded the development of a diverse range of chemical sensors, due to the ease with which the process can be modified to tailor properties of the material such as porosity and hydrophobicity. Furthermore, sol-gel films can be deposited on a variety of substrates, thus allowing flexibility in sensor configuration. This
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The use of sol-gel chemistry has afforded the development of a diverse range of chemical sensors, due to the ease with which the process can be modified to tailor properties of the material such as porosity and hydrophobicity. Furthermore, sol-gel films can be deposited on a variety of substrates, thus allowing flexibility in sensor configuration. This
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2019
Sol–gel processing is a nonmelting path to forming primarily silicate glasses. The most widely used precursors for the sol–gel process are metal alkoxides that undergo hydrolysis and condensation polymerization. Pure silica, binary compositions and multicomponent compositions are reacted to generate oxide polymers in the presence of water and alcohols.
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Sol–gel processing is a nonmelting path to forming primarily silicate glasses. The most widely used precursors for the sol–gel process are metal alkoxides that undergo hydrolysis and condensation polymerization. Pure silica, binary compositions and multicomponent compositions are reacted to generate oxide polymers in the presence of water and alcohols.
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