My company is making use of aluminium nitride plates (of approx. size 6mm x 20mm by 0.6mm thick) for a thermally conductive, but electrically insulating interface for a high voltage device. In controlled conditions these parts work well, but in other environments we have observed varable electrical resistance. Also we have observed that if a person blows gently on to the plate during tests the resistance falls significantly (by at least 80%) and then recovers slowly over a period of around 10 seconds. I assume that humidity is causing these changes, but has anyone got any experience with this phenomenon. Is anyone able to provide information on the electrical resistance of AlN with respect to humidity? Through a web search I have found a limited amount of information that suggests resistance can drop in humid conditions if the material is porous and I am investigating further, but any assistance would be appreciated.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, weâ€™ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now