Molybdenum disilicide heating wire and preparation method and application thereof

• Main Authors: MA SHENG, ZHONG XIAOHUA, LI LIWEI, KANG SU-NAM, MENG YIMIN, ZENG GUANGPENG, CHEN XI
• Format: Patent
• Language: Chinese; English
• Published: 23.12.2022
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention discloses a molybdenum disilicide heating wire and a preparation method and application thereof, and relates to the technical field of electric heating elements. The preparation method of the molybdenum disilicide heating wire comprises the following steps: a first heat treatment stage: heating the molybdenum disilicide heating wire to 1200-1600 DEG C, preserving heat for 30-120 minutes, and then cooling; a film removing stage: grinding and removing the SiO2 film generated on the surface of the cooled molybdenum disilicide heating wire; and in the second heat treatment stage, the molybdenum disilicide heating wire is heated to 1200-1600 DEG C, the heat preservation time is 24-48 h, and the high-temperature stable molybdenum disilicide heating wire is obtained after cooling. According to the method, impurity ions such as Ca < + >, K < + > and Na < + > which influence the stability of the SiO2 film are volatilized in the first heat treatment process, the SiO2 film with glassy luster can be formed