Ceramic hollow spheres and their applications

Ceramic hollow spheres are being developed for electronic uses in piezoelectric transducers and low dielectric constant substrates, for structural applications in syntactic and metal foams, for fluid transport uses in filters and radiant burners, and for acoustic insulation. Fabrication of coarse hollow spheres (1–10 mm) is by nozzle or sacrificial core processes and fine sizes (1–100 microns) are fabricated using sol-gel techniques.