| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for evaluating degrees of hydration of an annealing separating agent for a directional electromagnetic steel plate, by using changes in the weight between 200°C to 500°C. SOLUTION: Degrees of hydration of an annealing separating agent for a directional electromagnetic steel plate are evaluated by evaluating changes in weight between 200°C to 500°C, according to a method of thermogravimetric analysis. Based on these degrees of hydration, level management of the degrees of hydration of the annealing separating agent is performed, whereby the yield of directional electromagnetic steel plates which is superior in coating properties can be enhanced. COPYRIGHT: (C)2009,JPO&INPIT
|
