US 11,752,662 B2
Process and device for preparing a 3-dimensional body, in particular a green body
Amir Abdolvand, Erlangen (DE); and Ralf Keding, Erlangen (DE)
Assigned to Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V., Munich (DE)
Appl. No. 16/499,251
Filed by Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V., Munich (DE)
PCT Filed Mar. 28, 2017, PCT No. PCT/EP2017/000375
§ 371(c)(1), (2) Date Sep. 28, 2019,
PCT Pub. No. WO2018/177495, PCT Pub. Date Oct. 4, 2018.
Prior Publication US 2020/0023548 A1, Jan. 23, 2020
Int. Cl. B28B 1/00 (2006.01); C03B 19/06 (2006.01); C04B 35/111 (2006.01); C04B 35/14 (2006.01); C04B 35/443 (2006.01); C04B 35/46 (2006.01); C04B 35/565 (2006.01); C04B 35/581 (2006.01); C04B 35/584 (2006.01); C04B 35/626 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 80/00 (2015.01)
CPC B28B 1/001 (2013.01) [C03B 19/06 (2013.01); C04B 35/111 (2013.01); C04B 35/14 (2013.01); C04B 35/443 (2013.01); C04B 35/46 (2013.01); C04B 35/565 (2013.01); C04B 35/581 (2013.01); C04B 35/584 (2013.01); C04B 35/6263 (2013.01); C04B 35/62625 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 80/00 (2014.12); C04B 2235/3217 (2013.01); C04B 2235/5427 (2013.01); C04B 2235/5454 (2013.01); C04B 2235/602 (2013.01); C04B 2235/608 (2013.01); C04B 2235/61 (2013.01); C04B 2235/614 (2013.01); C04B 2235/658 (2013.01); C04B 2235/665 (2013.01); C04B 2235/80 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A process for preparing a 3-dimensional vitreous or ceramic body, which comprises at least the following steps:
a) providing an electrostatically stabilized suspension of particles;
b) effecting a local destabilization of the suspension of particles by a localized electrical discharge between a charge injector and the suspension at a predetermined position and causing an aggregation and precipitation of the particles at said position;
c) repeating step b) at different positions and causing a formation of larger aggregates until a final aggregate of particles representing the 3-dimensional body having predetermined dimensions has been formed;
wherein the charge injector includes i) at least one discharge electrode which does not contact said suspension of particles or ii) a source of charged particles.