Title:
METHOD FOR PRODUCING CERAMIC PARTS AND USE OF THE PARTS OBTAINED BY THIS METHOD
Document Type and Number:
WIPO Patent Application WO/2023/079448
Kind Code:
A1
Abstract:
In order to produce a ceramic part from a mixture of two pulverulent mineral materials which differ in terms of their size and which consist of alumina and titanium oxide: (a) a homogenous aqueous suspension of the mixture is prepared, with one or more binders and/or one or more plasticisers which are capable of being pyrolysed by heat during subsequent sintering, the preparation consisting in: (a1) bringing the starting materials into contact with water and at least one deflocculating agent and/or at least one dispersant, and mixing in order to deagglomerate the pulverulent materials; and (a2) adding the binder(s) and/or the plasticiser(s) to the suspension obtained in (a1) until they are homogenised; (b) carrying out cryogenic granulation of the aqueous suspension obtained in (a2), said cryogenic granulation consisting in freezing by spraying followed by lyophilisation in order to obtain lyophilised granules; (c) shaping the granules obtained in (b) by pressing to obtain a preform; then (d) the preform is sintered in order to obtain the desired part.
Inventors:
TABARES MEDINA TATIANA (FR)
DELHOTE NICOLAS (FR)
GEFFROY PIERRE-MARIE (FR)
TANTOT OLIVIER (FR)
CHARTIER THIERRY (FR)
DELHOTE NICOLAS (FR)
GEFFROY PIERRE-MARIE (FR)
TANTOT OLIVIER (FR)
CHARTIER THIERRY (FR)
Application Number:
PCT/IB2022/060543
Publication Date:
May 11, 2023
Filing Date:
November 02, 2022
Export Citation:
Assignee:
UNIV LIMOGES (FR)
CENTRE NAT RECH SCIENT (FR)
CENTRE NAT DETUDES SPATIALES CNES (FR)
CENTRE NAT RECH SCIENT (FR)
CENTRE NAT DETUDES SPATIALES CNES (FR)
International Classes:
C04B35/111; B01J2/02; C04B35/117; C04B35/626; C04B35/634; C04B35/636; F26B5/06; H01P1/00; H01P11/00
Domestic Patent References:
| WO2019038497A1 | 2019-02-28 | |||
| WO2019038497A1 | 2019-02-28 |
Other References:
LA LUMIA F. ET AL: "Fabrication of homogenous pellets by freeze granulation of optimized TiO2-Y2O3 suspensions", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol. 39, no. 6, 1 June 2019 (2019-06-01), AMSTERDAM, NL, pages 2168 - 2178, XP055926509, ISSN: 0955-2219, DOI: 10.1016/j.jeurceramsoc.2019.01.036
MARCO D DI ET AL: "Dielectric properties of alumina doped with TiO2from 13 to 73GHz", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, ELSEVIER, AMSTERDAM, NL, vol. 37, no. 2, 21 September 2016 (2016-09-21), pages 641 - 646, XP029777924, ISSN: 0955-2219, DOI: 10.1016/J.JEURCERAMSOC.2016.09.016
MIYAUCHI Y ET AL: "Improvement of the dielectric properties of rutile-doped Al"2O"3 ceramics by annealing treatment", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, ELSEVIER, AMSTERDAM, NL, vol. 26, no. 10-11, 1 January 2006 (2006-01-01), pages 2093 - 2096, XP024960756, ISSN: 0955-2219, [retrieved on 20060101], DOI: 10.1016/J.JEURCERAMSOC.2005.09.063
HUANG CHENG-LIANG ET AL: "Microwave Dielectric Properties of Sintered Alumina Using Nano-Scaled Powders of alpha-Alumina and TiO2", JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 90, no. 5, 1 May 2007 (2007-05-01), US, pages 1487 - 1493, XP055927339, ISSN: 0002-7820, DOI: 10.1111/j.1551-2916.2007.01557.x
SINGLARD M ET AL: "Freeze granulation and spray drying of mixed granules of Al2O3", POWDER TECHNOLOGY, ELSEVIER, BASEL (CH), vol. 395, 22 September 2021 (2021-09-22), pages 280 - 289, XP086866681, ISSN: 0032-5910, [retrieved on 20210922], DOI: 10.1016/J.POWTEC.2021.09.044
YAO YIMING ET AL: "Microstructure of Plasma Sprayed Al2O3-3wt%TiO2 Coating Using Freeze Granulated Powder", JOURNAL OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING, vol. 04, no. 07, 25 July 2016 (2016-07-25), pages 8 - 14, XP093014746, ISSN: 2327-6045, Retrieved from the Internet DOI: 10.4236/msce.2016.47002
LA LUMIA ET AL.: "Fabrication of homogenous pellets by freeze granulation of optimized T1O -Y O suspensions", vol. 39, 2019, JOURNAL OF EUROPEAN CERAMIC SOCIETY
MARCO D ET AL.: "Dielectric properties of alumina doped with TiO from 13 to 73 Ghz", vol. 37, 2016, JOURNAL OF EUROPEAN CERAMIC SOCIETY
MIYAUCHI ET AL.: "Im-provement of the dielectric properties of rutile doped A1 O ceramics by annealing society", vol. 26, 11 October 2006, JOURNAL OF EUROPEAN CERAMIC SOCIETY
HUANG CHENG-LIANG ET AL.: "Microwave Dielectric Properties of Sintered Alumina Using Nano-Scaled Powders of alpha-Alumina and TiO", vol. 90, 5 May 2007, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, pages: 1487 - 1493
MARCO D DI ET AL: "Dielectric properties of alumina doped with TiO2from 13 to 73GHz", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, ELSEVIER, AMSTERDAM, NL, vol. 37, no. 2, 21 September 2016 (2016-09-21), pages 641 - 646, XP029777924, ISSN: 0955-2219, DOI: 10.1016/J.JEURCERAMSOC.2016.09.016
MIYAUCHI Y ET AL: "Improvement of the dielectric properties of rutile-doped Al"2O"3 ceramics by annealing treatment", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, ELSEVIER, AMSTERDAM, NL, vol. 26, no. 10-11, 1 January 2006 (2006-01-01), pages 2093 - 2096, XP024960756, ISSN: 0955-2219, [retrieved on 20060101], DOI: 10.1016/J.JEURCERAMSOC.2005.09.063
HUANG CHENG-LIANG ET AL: "Microwave Dielectric Properties of Sintered Alumina Using Nano-Scaled Powders of alpha-Alumina and TiO2", JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 90, no. 5, 1 May 2007 (2007-05-01), US, pages 1487 - 1493, XP055927339, ISSN: 0002-7820, DOI: 10.1111/j.1551-2916.2007.01557.x
SINGLARD M ET AL: "Freeze granulation and spray drying of mixed granules of Al2O3", POWDER TECHNOLOGY, ELSEVIER, BASEL (CH), vol. 395, 22 September 2021 (2021-09-22), pages 280 - 289, XP086866681, ISSN: 0032-5910, [retrieved on 20210922], DOI: 10.1016/J.POWTEC.2021.09.044
YAO YIMING ET AL: "Microstructure of Plasma Sprayed Al2O3-3wt%TiO2 Coating Using Freeze Granulated Powder", JOURNAL OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING, vol. 04, no. 07, 25 July 2016 (2016-07-25), pages 8 - 14, XP093014746, ISSN: 2327-6045, Retrieved from the Internet
LA LUMIA ET AL.: "Fabrication of homogenous pellets by freeze granulation of optimized T1O -Y O suspensions", vol. 39, 2019, JOURNAL OF EUROPEAN CERAMIC SOCIETY
MARCO D ET AL.: "Dielectric properties of alumina doped with TiO from 13 to 73 Ghz", vol. 37, 2016, JOURNAL OF EUROPEAN CERAMIC SOCIETY
MIYAUCHI ET AL.: "Im-provement of the dielectric properties of rutile doped A1 O ceramics by annealing society", vol. 26, 11 October 2006, JOURNAL OF EUROPEAN CERAMIC SOCIETY
HUANG CHENG-LIANG ET AL.: "Microwave Dielectric Properties of Sintered Alumina Using Nano-Scaled Powders of alpha-Alumina and TiO", vol. 90, 5 May 2007, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, pages: 1487 - 1493
Attorney, Agent or Firm:
CABINET CHAILLOT (FR)
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