Transparent and Insulating Materials Having Evacuated Capsules

Lin Simpson (Inventor), Chaiwat Engtrakul (Inventor)

Research output: Patent


Transparent and insulating materials having evacuated cap­sules are provided. According to an aspect of the invention, a method includes forming evacuated capsules within a solution, and dispersing and suspending the evacuated cap­sules within the solution such that a packing density of the evacuated capsules within the solution is greater than 30%, and a visible light transmission of the solution including the evacuated capsules is greater than 75%. According to another aspect of the invention, a layer includes a plurality of evacuated capsules distributed within a dried sol-gel. A thermal conductivity of the layer is between 0.02 W/m-K and 0.001 W/m-K, and the layer has a visible light trans­mission of greater than 30%.
Original languageAmerican English
Patent number10,865,136 B2
Filing date15/12/20
StatePublished - 2020

NREL Publication Number

  • NREL/PT-5K00-78745


  • layer
  • photovoltaics
  • sol-gel method
  • solution


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