US 12,459,869 B2
Manufacture of green compacts from Na-β-aluminate
Johannes Roesler, Tettau/Schauberg (DE); Cornelius Dirksen, Hermsdorf (DE); Matthias Schulz, Hermsdorf (DE); and Roland Weidl, Hermsdorf (DE)
Assigned to FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE); and RÖSLER CERAMINNO GMBH, Tettau-Schauberg (DE)
Appl. No. 17/771,516
Filed by FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE); and Rösler Ceraminno GmbH, Tettau-Schauberg (DE)
PCT Filed Nov. 2, 2020, PCT No. PCT/EP2020/080680
§ 371(c)(1), (2) Date Apr. 25, 2022,
PCT Pub. No. WO2021/089481, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10 2019 129 869.5 (DE), filed on Nov. 6, 2019.
Prior Publication US 2023/0142056 A1, May 11, 2023
Int. Cl. C04B 35/44 (2006.01); C04B 35/63 (2006.01); C04B 35/632 (2006.01); H01M 10/39 (2006.01)
CPC C04B 35/44 (2013.01) [C04B 35/6303 (2013.01); C04B 35/632 (2013.01); H01M 10/39 (2013.01); C04B 2235/3222 (2013.01); C04B 2235/602 (2013.01); C04B 2235/6027 (2013.01); H01M 2300/0068 (2013.01)] 19 Claims
 
1. A method for manufacturing sinterable green bodies from sodium-β-aluminate- and/or precursor-particles bonded via binders, said method comprising:
providing a casting mold formed from aggregate particles bonded with organic and/or inorganic binders, wherein the casting mold is provided by pouring a pourable mixture comprising the aggregate particles and the organic and/or inorganic binders into a negative of the casting mold and, after a partial setting and drying of the pourable mixture, removing the casting mold from the negative and drying it further;
introducing a castable slip containing the sodium-β-aluminate- and/or precursor-particles as well as dispersants and binders into the casting mold and, after solidification, demolding it as a sinterable green body; and
reusing the casting mold, wherein
the castable slip is an aqueous suspension,
the aggregate particles are particles of polyethylene glycol, titanium oxide, aluminum oxide, sodium aluminate or silicate, or mixtures thereof,
the inorganic binders are cementitious mixtures containing lime, and
the organic binders are selected from epoxy, phenolic, or polyester resins.