Composite Materials with Ultrasonically Induced Layer or Lattice Structure

Polymer composites with periodic layers or lattice structures were fabricated with polysiloxane resin and acrylic particles. The particles were kept arranged by ultrasonic standing waves during solidification of polysiloxane resin. A pair of transducers were placed face-to-face for excitation of a strong and uniform standing wave. A two-dimensional lattice structure was fabricated by solidification in two orthogonal standing waves.