Development of low-boss grain-oriented silicon steel

Grain-oriented silicon steel has evolved through improvement of {110}<001> orientation, development of thinner-gage material, and development of magnetic domain refining techniques. Core loss in the material has been dramatically reduced over the past 40 years. To further improve core loss, mobile domain walls must he increased by reducing the pinning sites, and surface closure domains must be decreased by improving {110}<001> orientation. When these technologies are industrialized, a core-loss reduction of 25% is expected at 1.7 T for 0.23 mm thick grain-oriented silicon steel.