Polymer-ceramic core-shell particle powders, and processes for making and articles comprising such powders

A ceramic-polymer composite powder, the powder comprising:

• a plurality of core-shell particles, where:
• each of the core-shell particles comprises a core and a shell around the core;
• the core comprises a particle of a ceramic selected from the group of ceramics consisting of:
• Al2O3, Fe3O4, Fe2O3, ZnO, ZrO2, SiO2, and combinations of any two or more of these ceramics;
• the shell comprises a polymer selected from the group of polymers consisting of:
• polycarbonate (PC) copolymers, polyetherimide (PEI), polyetherimide (PEI) copolymers, polyphenylsulfone (PPSU), polyarylethersulfone (PAES), and polyether sulfones (PES);
• and
• where the core-shell particles comprise between 50% and 90% by volume of the ceramic, and between 10% and 50% by volume of the polymer;
• where the core-shell particles have a Dv50 of from 100 nanometers (nm) to 100 micrometers (μm);
• and
• where substantially all of the polymer is not cross-linked;
• and
• where the core-shell particles are in powder form.