RU2006144450A - СПОСОБ ПОЛУЧЕНИЯ ФОРМОВАННЫХ ИЗДЕЛИЙ НА ОСНОВЕ β-SiC ДЛЯ ПРИМЕНЕНИЯ В АГРЕССИВНЫХ СРЕДАХ - Google Patents

СПОСОБ ПОЛУЧЕНИЯ ФОРМОВАННЫХ ИЗДЕЛИЙ НА ОСНОВЕ β-SiC ДЛЯ ПРИМЕНЕНИЯ В АГРЕССИВНЫХ СРЕДАХ Download PDF

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RU2006144450A
RU2006144450A RU2006144450/03A RU2006144450A RU2006144450A RU 2006144450 A RU2006144450 A RU 2006144450A RU 2006144450/03 A RU2006144450/03 A RU 2006144450/03A RU 2006144450 A RU2006144450 A RU 2006144450A RU 2006144450 A RU2006144450 A RU 2006144450A
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sic
precursor
volume
mixture
resin
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RU2006144450/03A
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RU2375331C2 (ru
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Шарлотт ФАМ (FR)
Шарлотт Фам
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Сикат (Fr)
Сикат
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Abstract

1. Способ получения композитного материала на основе β-SiC, включающий:а) получение смеси, называемой «смесь-предшественник», содержащей, по меньшей мере, один предшественник β-SiC и, по меньшей мере, одну углеродсодержащую смолу, предпочтительно термоотверждающую,б) формование указанной смеси-предшественника, в частности, в виде гранул, пластин, труб или кирпичей, для получения промежуточного изделия,в) полимеризацию смолы,г) введение указанных промежуточных изделий в емкость,д) закрытие указанной емкости с помощью средства для закрывания, позволяющего избежать повышения давления газа,е) термообработку указанных промежуточных указанных изделий при температуре 1100°-1500°С для удаления органических компонентов смолы и образования β-SiC в конечном изделии.2. Способ по п.1, в котором стадия а) заменена стадией аа):аа) получения смеси, называемой «смесью-предшественник», содержащей включения, из которых, по меньшей мере, одна часть представляет собой α-SiC, по меньшей мере, один предшественник β-SiC и, по меньшей мере, одну углеродсодержащую смолу, предпочтительно термоотверждаемую.3. Способ по любому из пп.1 или 2, в котором термообработку (стадию е) осуществляют при температуре 1100°-1500°С, предпочтительно 1200°-1500°С, более предпочтительно 1250°-1450°С, еще более предпочтительно 1250°-1400°С.4. Способ по любому из пп.1 или 2, в котором предшественником β-SiC является кремний, предпочтительно используемый в форме порошка, имеющего средний диаметр от 0,1 до 20 мкм.5. Способ по любому из пп.1 или 2, в котором термоотверждаемая смола выбрана из фенольных, акриловых или фурфуриловых смол.6. Способ по любому из пп.1 или 2, в котор�

Claims (17)

1. Способ получения композитного материала на основе β-SiC, включающий:
а) получение смеси, называемой «смесь-предшественник», содержащей, по меньшей мере, один предшественник β-SiC и, по меньшей мере, одну углеродсодержащую смолу, предпочтительно термоотверждающую,
б) формование указанной смеси-предшественника, в частности, в виде гранул, пластин, труб или кирпичей, для получения промежуточного изделия,
в) полимеризацию смолы,
г) введение указанных промежуточных изделий в емкость,
д) закрытие указанной емкости с помощью средства для закрывания, позволяющего избежать повышения давления газа,
е) термообработку указанных промежуточных указанных изделий при температуре 1100°-1500°С для удаления органических компонентов смолы и образования β-SiC в конечном изделии.
2. Способ по п.1, в котором стадия а) заменена стадией аа):
аа) получения смеси, называемой «смесью-предшественник», содержащей включения, из которых, по меньшей мере, одна часть представляет собой α-SiC, по меньшей мере, один предшественник β-SiC и, по меньшей мере, одну углеродсодержащую смолу, предпочтительно термоотверждаемую.
3. Способ по любому из пп.1 или 2, в котором термообработку (стадию е) осуществляют при температуре 1100°-1500°С, предпочтительно 1200°-1500°С, более предпочтительно 1250°-1450°С, еще более предпочтительно 1250°-1400°С.
4. Способ по любому из пп.1 или 2, в котором предшественником β-SiC является кремний, предпочтительно используемый в форме порошка, имеющего средний диаметр от 0,1 до 20 мкм.
5. Способ по любому из пп.1 или 2, в котором термоотверждаемая смола выбрана из фенольных, акриловых или фурфуриловых смол.
6. Способ по любому из пп.1 или 2, в котором температура полимеризации смолы (стадия в)) находится в интервале 150°-300°С, предпочтительно 150°-250°С, еще более предпочтительно 150°-210°С.
7. Способ по любому из пп.1 или 2, отличающийся тем, что указанные включения и/или предшественники находятся в форме порошка, зерен или волокон.
8. Способ по любому из пп.1 или 2, в котором массовая фракция указанных включений составляет 80-95% от общей массы смеси-предшественника.
9. Способ по любому из пп.1 или 2, отличающийся тем, что часть указанных включений представляет собой глинозем, кремнезем, TiN, Si3N4 или смесь этих соединений.
10. Способ по п.9, отличающийся тем, что, по меньшей мере, 50%, предпочтительно, по меньшей мере, 70 мас.% указанных включений представляют собой α-SiC.
11. Способ по п.1, отличающийся тем, что объем емкости, который не занят указанными промежуточными изделиями, заполнен твердым инертным материалом, предпочтительно легко разделяемым и легко собираемым, таким как кирпичи из β-SiC или α-SiC, или зерна из α-SiC таким образом, чтобы объем, занятый газом внутри емкости, был не выше 50% от внешнего объема промежуточных изделий.
12. Способ по п.2, отличающийся тем, что объем емкости, который не занят указанными промежуточными изделиями, заполнен твердым инертным материалом, предпочтительно легко разделяемым и легко собираемым, таким как кирпичи из β-SiC или α-SiC, или зерна из α-SiC таким образом, чтобы объем, занятый газом внутри емкости, был не выше 50% от внешнего объема промежуточных изделий.
13. Способ по любому из пп.10-12, в котором объем, занятый газом внутри емкости, занимает не более 20%, предпочтительно не более 10% от внешнего объема промежуточных изделий.
14. Способ по п.11, отличающийся тем, что выделяющийся газ, выходящий из обрабатываемых изделий при температуре от комнатной до 800°С, составляет объем, равный, по меньшей мере, двукратному объему, занимаемому газом внутри емкости, предпочтительно пятикратный объем, более предпочтительно, по меньшей мере, десятикратный объем.
15. Продукт, который может быть получен способом согласно одному из пп.1-14.
16. Применение продукта, полученного в результате способа согласно одному из пп.1-14 в форме плит или кирпичей, в качестве внутренней облицовки электролизной ванны расплавленной соли или внутренней облицовки печи для прокаливания.
17. Применение по п.16 в электролизной ванне для получения алюминия из смеси глинозема и криолита.
RU2006144450/03A 2004-05-14 2005-05-10 СПОСОБ ПОЛУЧЕНИЯ ФОРМОВАННЫХ ИЗДЕЛИЙ НА ОСНОВЕ БЕТТА-Sic ДЛЯ ПРИМЕНЕНИЯ В АГРЕССИВНЫХ СРЕДАХ RU2375331C2 (ru)

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FR0405284 2004-05-14
PCT/FR2005/001163 WO2005121044A2 (fr) 2004-05-14 2005-05-10 PROCEDE DE FABRICATION DE PIECES DE FORME A BASE DE β-SIC POUR UTILISATION DANS DES MILIEUX AGRESSIFS

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