Compound bodies based on ferro-electric aerosols for voltage-dependent dielectric control and production processes

摘要

Ferroelectric composites are prepared by sol-gel derived procedures. The present invention utilizes a sol-gel process to form a gel in a mold of the desired size and shape ([1]-[4]), to dry the gel using a supercritical fluid extraction ([5]-[7]), to sinter the dried gel to a crystalline ceramic ([8]), and finally to impregnate the pores with a low loss polymer ([9]). The aerogel composition may be a barium titanate-based composition such as barium strontium titanate (BST). Making a ferroelectric aerogel composite provides a unique and novel means of fully exploiting the voltage- and/or frequency-tunable properties of certain compositions by maximizing their desirable properties and minimizing their undesirable characteristics such as loss at operational frequencies (Fig. 2). IMAGE