This work presents the results of studying the features of the casting process of glass-coated microwires of alloys based on silver, which has a near-zero TCR, and nickel, which has a high thermo emf.

The paper presents the results of research and development of glasses for insulation of cast microwires of the PbO - SiO2 - Na2O - InO2 - SnO2 system. The optimal composition has been determined, which makes it possible to establish a stable process of casting microwires from indium and tin with a length of more than 1000 meters. It is shown that from such microwires it is possible that small base fusible fuses with a high melting current density could be manufactured.

The article presents results of comprehensive studies on the development of technology for the production of thermoresistant cast microwires from nickel with addition of small quantities of chromium (0.2–0.6%). The specific characteristics of the casting process were studied from the standpoint of stability and achieving high values of temperature coefficient of resistance.