发明名称 |
Deflection ring of sintered MgZn-ferrite material, cathode ray tube comprising such a ring and moulding made from this material |
摘要 |
Deflection ring of sintered MgZn-ferrite material, cathode ray tube comprising such a ring and moulding made from this material. The invention relates to a deflection ring of sintered MgZn-ferrite material. In accordance with the invention, this deflection ring is characterized in that the majority of the grains of the sintered material have a monodomain structure. By virtue thereof, a relatively small heat dissipation occurs in the ring when it is used in a cathode ray tube. The average grain size of the sintered MgZn-ferrite material is preferably 2.8 micrometers or less. MgZn-ferrite materials whose composition corresponds to the formula Mg1-zZnzFe2-yO4, wherein 0.1<z<0.4 and 0.01<y<0.3, have the additional advantage that they have a relatively high saturation magnetization and a relatively high electrical resistance. The invention also relates to a cathode ray tube comprising the abovementioned deflection ring and to a moulding made from the above-mentioned MgZn-ferrite material.
|
申请公布号 |
US5841225(A) |
申请公布日期 |
1998.11.24 |
申请号 |
US19950553229 |
申请日期 |
1995.11.07 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
VAN DER ZAAG, PIETER J.;VAN DER VALK, PIETER J.;DE WIT, HENDRIK J. |
分类号 |
C04B35/26;H01F1/34;H01F41/02;H01J29/76;(IPC1-7):C04B35/26;H01J29/70 |
主分类号 |
C04B35/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|