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High Dielectric Constant CCTO/PI Composites Enabled by Dispersants

Invention Reference Number



Capacitors used in power converter systems (decoupling or filtration purposes) typically are made of ceramics or polymeric dielectric materials, both of which have limitations with the new demands of high temperature, high energy density, and reliable operation. Ceramic dielectric materials have high dielectric constant but low breakdown voltages and tend to crack due to thermal and mechanical shocks, which leads to short circuit failure. On the other hand, polymers possess high breakdown voltages but have lower dielectric constant and undergo thermal degradation at high operating temperatures. This technology takes the best features of both materials by creating a ceramic-polymer composite, making use of an additive to produce a stable, homogenous dielectric material. This novel dielectric nanocomposite reduces the volume and promises a reliable device operation, enabling higher-temperature operation (≥200 degrees Celsius) with a high dielectric constant (200 - 500). By adding a dispersant, the technology improves dielectric properties resulting in high performance both in high temperature and in dielectric strength, while enabling decreased volume. This capacitor technology is expected to result in superior performance to existing technologies, a pathway to meet future power electronics needs for a multitude of applications.


  • Lower cost
  • High dielectric strength
  • Operates at high temperatures
  • Reduced footprint
  • Produce using less energy
  • Stable, homogenous dispersion
  • Self-healable, will not burn

Applications and Industries

  • Automotive/electric vehicle manufacturing
  • Battery/capacitor manufacturing
  • Any industry using power electronics for high power applications
  • Capacitor manufacturing companies


To learn more about this technology, email or call 865-574-1051.