Featured News - Current News - Archived News - News Categories

Temperature‐dependent thermal conductivity of flexible yttria‐stabilized zirconia substrate via 3ω technique

by CBusch

Article written by University of Houston and ENrG Inc.

Tue, Jul 11th 2017 03:00 pm

Abstract

Thermal management in flexible electronic has proven to be challenging thereby limiting the development of flexible devices with high power densities. To truly enable the technological implementation of such devices, it is imperative to develop highly thermally conducting flexible substrates that are fully compatible with large‐scale fabrication. Here, we present the thermal conductivity of state‐of‐the‐art flexible yttria‐stabilized zirconia (YSZ) substrates measured using the 3ω technique, which is already commercially manufactured via roll‐to‐roll technique. We observe that increasing the grain size increases the thermal conductivity of the flexible 3 mol.% YSZ, while the flexibility and transparency of the sample are hardly affected by the grain size enlargement. We exhibit thermal conductivity values of up to 4.16 Wm−1 K−1 that is at least 4 times higher than state‐of‐the‐art polymeric flexible substrates. Phonon‐hopping model (PHM) for granular material was used to fit the measured thermal conductivity and accurately define the thermal transport mechanism. Our results show that through grain size optimization, YSZ flexible substrates can be realized as flexible substrates, that pave new avenues for future novel application in flexible electronics through the utilization of both their ceramic structural flexibility and high heat dissipating capability.

 

The entire article is available via logn at the Wiley Online Library:

https://onlinelibrary.wiley.com/doi/pdf/10.1002/pssa.201700069

 

Article written by University of Houston and ENrG Inc.

http://www.uh.edu/

Upcoming Events

See the benefits of Thin E-Strate®

Advantages of Using Thin E-Strate®

Thin E-Strate® for active or passive device fabrication. More robust than silicon.

As a ceramic, 3YSZ is inert, of high purity, tolerates processing temperatures to 1200°C, and with its low thermal mass can tolerate high thermal shock during deposition or coating processes.

Being ultra thin to 20 microns thick, it presents a very low thermal resistance path for heat removal and a super thin profile for component coating.  Multi-layers of active layer coated Thin E-Strate® can easily be stacked into low profile components.

Featured Video

#
#

Industry Applications of Thin E-Strate®

Thin E-Strate® redefines the world of robust flexible ultra-thin ceramic foils.  Major applications include:

  • #
    Solar PV
  • #
    Fuel Cells
  • #
    Electronics
  • #
    Gas Sensors
  • #
    Cladding