... experience with more than 12years in this field.We focus on Sintered NdFeB magnet and develop it under experienced engineer and ... ,but in order to protect the surface,we have lots of surface treament ,like Nickel,Nickel-Copper-Nickel,Znic,Black&Grey ... temperature coefficients -0.09--0.13% of Br,and -0.5--0.8%/degree C of Hcj.Sintered NdFeB magnet offers the highest ...