Inorganic Insulated Winding Wires

Inorganic insulated winding wire uses inorganic materials such as ceramics, glass and oxides as insulating materials and is mainly used in high temperature environments. It has the advantages of thin insulation layer, good heat resistance and radiation resistance, but it also has the disadvantages of poor flexibility, low breakdown voltage and poor scratch resistance. Therefore, how to prepare inorganic insulated winding wire with low temperature sintering and good flexibility and adhesion is still the focus of future research.

Winding wire function is single, mainly used for electromagnetic energy conversion or signal transmission, over the years there has been no expansion of applications or technological innovation. Therefore, the development of the winding wire industry is relatively slow, domestic manufacturers are not innovative enough, product similarity is high, and price competition is fierce. In the future, the winding wire should be further researched in the following three areas:

1. Independent research and development of insulation materials. Domestic manufacturers of enameled wire varnish have weak R&D capability, mainly producing conventional enameled wire varnish, and some special insulating varnish is monopolized by foreign enterprises; on the other hand, polyimide film, aramid fiber paper and other high-end insulating materials basically depend on imports. Therefore, it is urgent for domestic enterprises to increase R&D investment and develop domestic alternative products.
2. Development of enameled flat wire for new energy vehicle motors. With China’s “carbon neutral”, “carbon peak” goal, the development of new energy vehicles to further speed up the new energy vehicle motor with high-temperature, corona-resistant enameled copper flat wire will become a new market growth point in the field of enameled wire. The production and processing of small-size copper flat wire, especially micro-fine copper flat wire, as well as corona-resistant enameled wire and corona-resistant film preparation are still the focus of future research and development.
3. The development of special winding wire. Aerospace, nuclear power and other fields of development, increased demand for high-temperature, radiation-resistant winding wire, so inorganic insulated wire will also become one of the future directions of research and development; at the same time, some special occasion applications of winding wire, such as superconducting enameled wire, capillary enameled wire is also an important future research direction.