![Author ORCID: We display the ORCID iD icon alongside authors names on our website to acknowledge that the ORCiD has been authenticated when entered by the user. To view the users ORCiD record click the icon. [opens in a new tab]](https://chemrxiv.org/engage/assets/public/chemrxiv/images/logos/orcid.png)
Abstract
We propose a process for decomposing and removing vacuum-compatible heat-resistant epoxy resins adhered to vacuum components by alkali fusion. We demonstrated the reworking of Al2O3 substrates with printed electrode patterns from the worn-out qPlus sensors using KOH-NaOH eutectic melt under atmospheric pressure. The substrate was reworked with a high yield of 94 % for a heating temperature of 510 ℃ and a duration of 5 min. The proposed method is an efficient removal technique for vacuum-compatible heat-resistant epoxy resins that can be performed at the laboratory level without special reagents or equipment. It enables reworking a wide range of vacuum components sufficiently resistant to the alkali melt.
