公开(公告)号：US20220380260A1

公开(公告)日：2022-12-01

申请号：US17626179

申请日：2020-08-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Amy T. Shah ,  James D. Hansen ,  David B. Stegall ,  Alexander J. Huffman ,  Gareth A. Hughes ,  Melissa A. Lackey ,  Kathleen M. Humpal ,  Andreas M. Geldmacher ,  Kristen F. Keller

IPC: C04B35/488 ,  C04B35/624 ,  C04B35/626 ,  C04B35/64 ,  C04B38/00 ,  C04B38/10

Abstract: The present disclosure provides a method of making a ceramic article. The method includes (a) obtaining a photopolymerizable slurry or sol including a plurality of ceramic particles distributed in the photopolymerizable slurry or sol and (b) selectively polymerizing the photopolymerizable slurry or sol using actinic radiation and continuous movement of a build substrate through the photopolymerizable slurry or sol to form a gelled article. The method also includes (c) extracting solvent from the gelled article to form an aerogel article or a xerogel article; (d) heat treating the aerogel article or the xerogel article to form a porous ceramic article; and (e) sintering the porous ceramic article to form a sintered ceramic article. The sintered ceramic article exhibits a particular density. Further, additive manufactured ceramic articles are provided that exhibit a particular density, opacity, or both. Preferably, all cross-sectional portions of an interior of the ceramic article having selected dimensions are free of a frequency analysis signal maxima larger than a background signal.