RU2006141000A - Способ увеличения прочности керамических изделий и изделий, изготовленных из них - Google Patents

Способ увеличения прочности керамических изделий и изделий, изготовленных из них Download PDF

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RU2006141000A
RU2006141000A RU2006141000/03A RU2006141000A RU2006141000A RU 2006141000 A RU2006141000 A RU 2006141000A RU 2006141000/03 A RU2006141000/03 A RU 2006141000/03A RU 2006141000 A RU2006141000 A RU 2006141000A RU 2006141000 A RU2006141000 A RU 2006141000A
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porous ceramic
ceramic product
boron
mullite
combination
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RU2006141000/03A
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RU2401821C2 (ru
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Роберт Т. НИЛССОН (US)
Роберт Т. НИЛССОН
Робин П. ЗИЕБАРТ (US)
Робин П. ЗИЕБАРТ
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Дау Глобал Технолоджиз Инк. (Us)
Дау Глобал Технолоджиз Инк.
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Claims (29)

1. Способ увеличения прочности пористого керамического изделия, включающий
(a) воздействие источника бора на пористое керамическое изделие, состоящее из керамических зерен, по существу химически связанных вместе, (b) нагрев пористого изделия в содержащей кислород атмосфере до температуры, достаточной для формирования пористого керамического изделия, имеющего увеличенную прочность.
2. Способ по п.1, в котором пористое керамическое изделие подвергают воздействию источником бора посредством пропитки жидкостью, содержащей растворенный в ней источник бора, и удаления жидкости, так что источник бора осаждается, по меньшей мере, на части керамических зерен пористого керамического изделия.
3. Способ по п.2, в котором источник бора осаждается из жидкости и жидкость впоследствии удаляется.
4. Способ по п.3, в котором источник бора осаждается посредством изменения pH, температуры или их сочетания.
5. Способ по п.1, в котором источник бора представляет собой оксид бора, борную кислоту, органический борат, карбид бора, нитрид бора, o-карборан, аммоний пентаборат, аммоний тетрафенил борат, борид металла, борат металла или их сочетание.
6. Способ по п.5, в котором источник бора представляет собой карбид бора, оксид бора, борную кислоту, органический борат или их сочетание.
7. Способ по п.1, в котором пористое керамическое изделие подвергают воздействию источником бора посредством нагрева, одновременно, предусматриваемого отдельно источника бора вместе с пористым керамическим изделием.
8. Способ по п.1, в котором нагрев осуществляется на воздухе.
9. Способ по п.1, в котором нагрев осуществляется до температуры, по меньшей мере, примерно от 1000°C, самое большее, примерно до 1450°C.
10. Способ по п.1, в котором пористое керамическое изделие представляет собой нитрид кремния, титанат алюминия, карбид кремния, кордиерит и муллит или их сочетание.
11. Способ по п.10, в котором пористое керамическое изделие представляет собой карбид кремния, кордиерит и муллит или их сочетание.
12. Способ по п.11 в котором пористое керамическое изделие представляет собой муллит.
13. Способ по п.12, в котором пористое керамическое изделие представляет собой игольчатый муллит.
14. Способ по п.1, в котором пористое керамическое изделие представляет собой фильтр для частиц сгоревшего дизельного топлива.
15. Пористое керамическое изделие, состоящее из керамических зерен, которые сплавлены вместе, в котором, по меньшей мере, на части керамических зерен имеется фаза оксидного стекла, содержащая бор.
16. Пористое керамическое изделие по п.15, в котором пористое керамическое изделие представляет собой муллит, карбид кремния, кордиерит, титанат алюминия или их сочетание.
17. Пористое керамическое изделие по п.16, в котором керамическое изделие представляет собой муллит или карбид кремния.
18. Пористое керамическое изделие по п.17, в котором пористое керамическое изделие представляет собой муллит.
19. Пористое керамическое изделие по п.18, в котором керамическое изделие представляет собой игольчатый муллит.
20. Пористое керамическое изделие по п.15, в котором фаза оксидного стекла, содержащая бор, состоит из редкоземельного металла, Zr, Hf, Sn, Si, N, C, Al или их сочетания.
21. Пористое керамическое изделие по п.20, в котором фаза оксидного стекла, содержащая бор, состоит из Nd, Ce, Zr, Sn, Si, N, C, Al или их сочетания.
22. Пористое керамическое изделие по п.15, в котором пористое керамическое изделие имеет прочность, которая, по меньшей мере, на 10% больше, чем у сходного пористого керамического изделия, где нет фазы оксидного стекла, содержащей бор.
23. Пористое керамическое изделие по п.22, в котором пористое керамическое изделие имеет коэффициент релаксации термических напряжений, который, по меньшей мере, примерно на 20% больше, чем у сходного пористого керамического изделия, у которого нет фазы оксидного стекла, содержащей бор.
24. Пористое керамическое изделие по п.15, в котором пористое керамическое изделие содержит бор в количестве, по меньшей мере, примерно 0,01 мас.% от пористого керамического изделия.
25. Пористое керамическое изделие по п.24, в котором пористое керамическое изделие представляет собой муллит.
26. Фильтр, состоящий из пористого керамического изделия по п.15.
27. Фильтр по п.26, в котором фильтр представляет собой фильтр для частиц сгоревшего дизельного топлива.
28. Фильтр по п.27, в котором фильтр имеет на себе катализатор.
29. Пористое керамическое изделие по п.22, в котором пористое керамическое изделие имеет коэффициент релаксации термических напряжений, который, по меньшей мере, примерно на 10% больше чем у сходного пористого керамического изделия, у которого нет фазы оксидного стекла, содержащей бор.
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