Deflection yoke and yoke core used for the deflection yoke

A yoke core used in a deflection yoke for deflecting an electron beam emitted from an electron gun of a CRT (cathode ray tube), the yoke core being mounted on the CRT at a position between a neck tube and a funnel of the CRT, wherein the yoke core has a cone shape with a large diameter part at one end thereof in a side of the funnel and a small diameter part at another end thereof in a side of the neck tube to allow the yoke core to cover the horizontal and vertical deflection coils, and the yoke core is made of a molded magnetic material cured by heating, and the molded magnetic material includes a binder comprising a resin and a magnetic powder treated with a surface treatment agent which comprises a compound having an aminoquinone group as a constitution unit, and the aminoquinone group is selected from a group of the aminoquinone groups shown with formulas (1) and (2), ##STR5## wherein Y:

• hydrogen atom, C.sub.1 .about.C.sub.6 alkyl group having at least one selected from a group of a straight chain, a cyclic chain, and a branched chain, aralkyl group, phenyl group,
• Z1:
• C.sub.2 .about.C.sub.16 alkylene group;
• phenylene group, aralkyl group, alkarilene group, --(CH.sub.2 CH.sub.2 --O)n --CH.sub.2 --CH.sub.2 -- (n:
• integer 1-50), and
• Z2:
• C.sub.1 .about.C.sub.6 alkylene group having at least one selected from a group of a straight chain and a branched chain.

A deflection yoke mounted on a color CRT (cathode ray tube) for deflecting plural electron beams emitted from electron guns disposed in line in the color CRT, the deflection yoke being equipped with a compensation magnetic plate for compensating a misconvergence generated on a display panel of the CRT, wherein the compensation magnetic plate is made of a molded magnetic product cured by heating, and the molded magnetic product includes a binder comprising a resin and a magnetic powder treated with a surface treatment agent which comprises a compound having an aminoquinone group as a constitutional unit, and the aminoquinone group is selected from a group of the aminoquinone groups shown with formulas (1) and (2), ##STR6## wherein Y:

• hydrogen atom, C.sub.1 .about.C.sub.6 alkyl group having at lest one selected from a group of a straight chain, a cyclic chain, and a branched chain, aralkyl group, phenyl group,
• Z1:
• C.sub.2 .about.C.sub.16 alkylene group, phenylene group, aralkyl group, alkarilene group, --(CH.sub.2 CH.sub.2 --O)n --CH.sub.2 --CH.sub.2 -- (n:
• integer 1-50), and
• Z2:
• C.sub.1 .about.C.sub.6 alkylene group having at least one selected from a group of a straight chain and a branched chain.

A deflection yoke mounted on a color CRT (cathode ray tube) for deflecting plural electron beams emitted from electron guns disposed in line in the color CRT, the deflection yoke being equipped with a magnetic core on which coils are wound for compensating a misconvergence generated on a display panel of the CRT, wherein the magnetic core is made of a molded magnetic product cured by heating, and the molded magnetic product includes a binder comprising a resin and a magnetic powder treated with a surface treatment agent which comprises a compound having an aminoquinone group as a constitutional unit, and the aminoquinone group is selected from a group of the aminoquinone groups shown with formulas (1) and (2), ##STR7## wherein Y:

• hydrogen atom, C.sub.1 .about.C.sub.6 alkyl group having at least one selected from a group of a straight chain, a cyclic chain, and a branched chain, aralkyl group, phenyl group,
• Z1:
• C.sub.2 .about.C.sub.16 alkylene group, phenylene group, aralkyl group, alkarilene group, --(CH.sub.2 CH.sub.2 --O)n --CH.sub.2 --CH.sub.2 -- (n:
• integer 1-50), and
• Z2:
• C.sub.1 .about.C.sub.6 alkylene group having at least one selected from a group of a straight chain and a branched chain.