https://hha.hitachi-hightech.com/zh/support/consumables-coatings-xrf-calibration-standards/plated-ag/kovar-650uin-16.3um
Plated Ag/Kovar 650uin 16.3um
Coatings reference standard for creating or validating calibrations on XRF analyzers with spot sizes smaller than 2 mm
platedagkovar