Nanoparticle Capacitors for Multi-Point Initiation

Multi-point initiators used in modern explosive projectiles rely on high voltage capacitors which can deliver high power in a low inductance configuration. Current capacitors meeting the required performance specifications are based on dielectric ceramics in multi-layer configurations. These capacitors cost as much as $100 and have a volume of over 400 mm3. This translates to $200-400/J/cm3, consequently, the use of multi-point initiators for many ARDEC applications is limited by size and cost of these capacitors. In response to this need, TPL proposes development of a revolutionary capacitor technology based on high energy density polymer-nanoparticle dielectrics. Previous work by TPL has defined a nanocomposite material system with an intrinsic energy density capability that exceeds conventional dielectrics by an order of magnitude. Further, the dielectric can be processed as a polymer and is compatible with low cost circuit board manufacturing processes. The proposed program will be directed at establishing manufacturing processes for multi-layer nanocomposite capacitors with form factor similar to conventional capacitors but with significantly reduced size and cost. Phase I objectives include a detailed design, cost analysis and proof of concept demonstration for capacitors with two orders of magnitude reduction in cost/energy density, $1-4/J/cm3.