摘要:
A method of manufacturing fluorescent material-dispersed glass, comprising: performing production of a fluorescent material-dispersed gel utilizing sol-gel reaction and acid-base reaction by preparing a fluorescent material-dispersed sol containing silicon alkoxide, metal chloride and/or metal alkoxide, and fluorescent material, and subsequently gelling the fluorescent material-dispersed sol; and performing production of a fluorescent material-dispersed glass by heating the fluorescent material-dispersed gel.
摘要:
The invention relates to a continuous sol-gel method for producing quartz glass, comprising the following steps: (a) continuously metering a silicon alkoxide into a first reactor (R1) and carrying out an at least proportional hydrolysis process by adding an aqueous mineral acid, thereby obtaining a first product flow (A); (b) continuously producing an aqueous silicic acid dispersion by continuously mixing water and silicic acid in a second reactor, thereby obtaining a second product flow (B); (c) continuously mixing the product flows (A) and (B) in a third reactor (R3) in order to produce a pre-sol, thereby obtaining a third product flow (C); (d) continuously adding an aqueous base to the product flow (C), thereby obtaining a sol; (e) continuously filling the exiting sol into molds, thereby obtaining an aquagel; (f) drying the aquagel, thereby obtaining xerogels; and (g) sintering the xerogels, thereby obtaining quartz glass, with the proviso that at least one of the steps (a) to (e) additionally includes a degassing process of at least one feed material used in the step.
摘要:
Borate-glass biomaterials comprising: aNa2O. bCaO. cP2O5. dB2O3 wherein a is from about 1- 40 wt%, b is from about 10 - 40 wt%, c is from about 1 - 40 wt%, and d is from about 35 -80 wt%; and wherein the biomaterial has a surface area per mass of more than about 5 m2/g. Methods of making and uses of these biomaterials.
摘要:
The invention relates to a material, especially a glassy material of pyrophosphate type, corresponding to the general formula (I): {[(M 2+ ) 1 -x (R + ) 2x ] 2 [(P 2 O 7 4- ) 1-y (PO 4 3- ) 4y/3 ]} n(H 2 O) in which x and y are positive rational numbers each between 0 and 0.8; n is such that the weight percentage of water in the material is greater than 0 and less than or equal to 95; M 2+ represents a bivalent ion of a metal selected from calcium, magnesium, strontium, copper, zinc, cobalt, manganese and nickel, or any mixture of such bivalent ions and R + represents a monovalent ion of a metal selected from potassium, lithium, sodium, and silver, or any mixture of such monovalent ions. This material in particular proves quite advantageous for the manufacture of bone replacements or prosthesis coatings.
摘要:
Vorgeschlagen wird ein kontinuierliches Sol-Gel-Verfahren zur Herstellung von Quarzglas, welches die folgenden Schritte umfasst: (a) kontinuierliches Eindosieren eines Siliziumalkoxids in einen ersten Reaktor (R1) und wenigstens anteilige Hydrolyse durch Zugabe einer wässrigen Mineralsäure unter Erhalt eines ersten Produktstroms (A); (b) kontinuierliche Herstellung einer wässrigen Kieselsäuredispersion durch kontinuierliches Vermischen von Wasser und Kieselsäure in einem zweiten Reaktor unter Erhalt eines zweiten Produktstroms (B); (c) kontinuierliches Vermischen der Produktströme (A) und (B) in einem dritten Reaktor (R3) zur Erzeugung eines Präsols unter Erhalt eines dritten Produktstroms (C); (d) kontinuierliche Zugabe einer wässrigen Base zum Produktstrom (C) unter Erhalt eines Sols; (e) kontinuierliches Abfüllen des austretenden Sols in Formen unter Erhalt eines Aquagels; (f) Trocknen der Aquagele unter Erhalt von Xerogelen; (g) Sintergung der Xerogele unter Erhalt von Quarzglas.
摘要:
Provided are spherical silicon oxycarbide particle material and manufacturing method thereof, wherein the average particle size is in the range of 0.1-100 µm and having a sphericity of 0.95-1.0. Spherical silicon oxycarbide particle material and manufacturing method thereof are provided as follows. Organotrialkoxysilane is hydrolyzed in a pH 3-6 acetic acid aqueous solution, thereafter an alkaline aqueous solution such as a pH 7-12 ammonia water was added to the obtained hydrolysate. The condensation reaction is performed in an alkaline range to form spherical polysilsesquioxane particles that are spherical silicon oxycarbide precursors that has no melting point or softening point. Sintering was then performed at a sintering temperature of 600-1400°C under inert atmosphere to obtain spherical silicon oxycarbide particle material.
摘要:
A novel polymer comprising a reaction product obtained by reacting an organosilane compound with a boron compound. The polymer comprises a reaction product obtained by reacting (a) an aminated silane compound represented by the formula R 4-n -Si-(OR') n (wherein R represents an aminated organic group; R' represetns methyl, ethyl, or propyl; and n is an integer of 1-3) with (b) at least one boron compound selected from the group consisting of H 3 BO 3 and B 2 O 3 , the amount of the ingredient (b) being 0.02 mol or larger per mol of the ingredient (a).
摘要:
Il est question d'un procédé de synthèse d'un verre de scellement par voie sol-gel, comprenant les étapes de : - la formation (E1) d'une solution par la mise en solution d'un alcoxyde de silice dans un solvant ; - l'hydrolyse (E2) de l'alcoxyde de silicium dans la solution pour former un monomère, un oligomère inorganique, ou un mélange de ceux-ci ; - l'ajout d'un précurseur d'alumine, d'un précurseur d'oxyde de baryum, d'un précurseur d'oxyde de calcium, d'un précurseur d'oxyde de bore, d'un précurseur d'oxyde de magnésium, d'eau et d'un acide dans la solution formant avec l'alcoxyde de silicium un mélange (E3.1, E3.2) ; - l'agitation et la condensation (E4) du mélange pour former un xérogel ; - la pulvérisation (E5) du xérogel pour obtenir une poudre d'oxydes ; - l'élaboration verrière (E6) de la poudre d'oxydes pour obtenir le verre de scellement.