Original ResearchPublished 26 August 2026Vacuum-compatible infrared emissivity characterization of high-temperature materials using direct electric heatingDongyang An · Shuangshuang Cheng · Zhao Liu · Shi Cheng · Jiaye Chen · Zengwu Tang · Jingmin Dai · Peng XiaoFrontiers in Thermal Engineeringdoi 10.3389/fther.2026.1922432