High Performance Dielectrics

Technology Summary

Current dielectric materials are limited and unable to meet all operating, temperature, response frequency, size, and reliability requirements needed for uncooled high-reliability electronics. To address this problem, scientists at Sandia have developed a method for producing dielectric materials using engineered chemical disorder, creating semi-conductor material that outperforms what is currently available.

Description

By developing a composition with dissimilar cations ((Ba,Bi)(Zn,Ti)O3), Sandia researchers created competing driving forces for crystallographic distortion, resulting in a highly polarizable material. In addition to the structural distortion at the atomic level, the thermodynamics associated with mixing these systems lead to chemical disorder and gradients at the mesoscopic level during thermal processing. This multi-level chemical and structural frustration results in large permittivity level values that are stable across a wide range of operating temperatures (250ºC+) and applied electric fields. In turn, Sandia’s dielectric material possesses multiple advantages: 1) the material exists in a highly polarizable state; 2) results in a heterogeneous microstructure that aids in the dielectric properties; 3) high temperature resistivity; and 4) high temperature stability.

Capacitors based on Sandia’s dielectric materials were developed for use in grid-tied storage; however, the resulting products will have various high operating temperature applications.

Benefits

  • Improvement of operating voltage and frequency
  • Increased efficiency and reliability
  • Eliminates the need for a cooling system
  • Stable at high operating temperatures
  • Reduced volume and cost

Applications and Industries

  • Optoelectric-high voltage LEDs
  • Energy grid
  • Alternative energy generation
  • Electric trains and cars
  • Defense
  • Down-hole electronics
  • Oil and gas

 

Technology IDSD #13051Development StagePrototype - Basic technological components are integrated to establish that key elements will work togetherAvailabilityAvailablePublished12/23/2015Last Updated12/23/2015