US 11,891,338 B2
Ceramic composite material
Jari Hannu, Oulu (FI); Jari Juuti, Oulu (FI); Heli Jantunen, Oulu (FI); Mikko Nelo, Oulu (FI); Tuomo Siponkoski, Oulu (FI); and Hanna Kähäri, Oulu (FI)
Assigned to Oulun yliopisto, Oulu (FI)
Filed by Oulun yliopisto, Oulu (FI)
Filed on Feb. 23, 2023, as Appl. No. 18/113,432.
Application 18/113,432 is a division of application No. 16/626,004, granted, now 11,613,797, previously published as PCT/FI2018/050518, filed on Jun. 28, 2018.
Claims priority of application No. 20175635 (FI), filed on Jun. 30, 2017.
Prior Publication US 2023/0192553 A1, Jun. 22, 2023
Int. Cl. C04B 35/00 (2006.01); B22F 3/02 (2006.01); C22C 1/051 (2023.01); C22C 32/00 (2006.01); B22F 1/052 (2022.01)
CPC C04B 35/00 (2013.01) [B22F 1/052 (2022.01); B22F 3/02 (2013.01); C22C 1/051 (2013.01); C22C 32/0015 (2013.01); B22F 2302/25 (2013.01)] 8 Claims
 
1. A process for manufacturing ceramic-ceramic composite material, the process comprising:
obtaining an aqueous solution of a first ceramic by dissolving powder of said first ceramic into water;
obtaining a powder containing said first ceramic precipitated on the surface of particles of a second ceramic by mixing powder of said second ceramic having a multimodal particle size where largest particle size is above 50 μm and less than 180 μm, with the aqueous solution of said first ceramic;
obtaining a powder mixture by mixing the powder containing said first ceramic precipitated on the surface of the particles of said second ceramic, with powder of said first ceramic having a particle size below 50 μm;
obtaining an aqueous composition containing said first ceramic and second ceramic, by adding saturated aqueous solution of said first ceramic to the powder mixture;
forming a disc of ceramic-ceramic composite material containing said first ceramic and second ceramic, by compressing the aqueous composition in a mould;
removing water from the ceramic-ceramic composite material by drying the disc;
wherein the content of said first ceramic is 10 vol-% to 35 vol-%, and the content of said second ceramic is above 65 vol-%, in the disc, and
wherein said first ceramic contains at least one of Li2MoO4, Na2Mo2O7, K2Mo2O7, (LiBi)0.5MoO4, Li2WO4, Mg2P2O7, and V2O5.