Electromagnetic radiation susceptor material employing ferromagnetic amorphous alloy particles

• US 5,278,377 A
• Filed: 11/27/1991
• Issued: 01/11/1994
• Est. Priority Date: 11/27/1991
• Status: Expired due to Fees

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Tsai, Ching-Long
• Primary Examiner(s): Reynolds, Bruce A.
• Assistant Examiner(s): HOANG, TU BA
• Application Number:
  US07/800,632
• Time in Patent Office: 776 Days
• Field of Search: 219/10.55 F, 219/10.55 E, 219/10.55 M, 219/10.55 R, 219/10.55 D, 428/328, 428/694, 148/403, 148/324, 420/428, 420/435, 420/440, 420/459, 252/62.54, 252/62.55, 75/170
• US Class Current: 219/759
• CPC Class Codes: H01F 1/15366 using a binder
• CPC Class Codes: H01F 1/15375 using polymers
• CPC Class Codes: H05K 9/0083 comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers H05K9/0086 takes precedence
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof

Abstract

An electromagnetic radiation susceptor material comprises at least one species of particle dispersed in a dielectric binder material. Any dispersed species of particle comprises a ferromagnetic amorphous alloy having the composition F_100-y-x M_y TM_x, where M is one or more magnetic elements selected from the group consisting of Fe, Co, and Ni; M is one or more metalloids selected from the group consisting of B, C, Al, Si, P and Ge; TM is one or more transition metal selected from the group consisting of columns IIIB (including the rare earths) to VIIB of the periodic table, and especially Ti, V, Cr, Mn, Zr, Nb, and Ta; 0≦x≦20; and 10≦y≦30. The transition metal controls the Curie temperature of the alloy to provide temperature self-regulation. Many types dielectric binder are suitable. The susceptor material may be applied to substrate, such as an electrically conductive material.

Claims

1. An electromagnetic radiation susceptor material, comprising at least one of a species of particles dispersed in a dielectric binder material, in which at least one of the species of particles comprises a ferromagnetic amorphous alloy having a composition F_100-y-x M_y TM_x, where F is at least one of any magnetic element selected from a first group consisting of Fe, Co, and Ni;

M is at least one of any metalloid selected from a second group consisting of B, C, Al, Si, P, Ge and As;

TM is at least one of any transition metal selected from columns IIIB to VIIB of the periodic table;

0<

x<

20; and

10<

y<

30.

2. The susceptor material of claim 1 in which TM is at least one of transition metals selected from a third group consisting of Ti, V, Cr, Mn, Zr, Nb, and Ta.

3. The susceptor material of claim 1 in which the dielectric binder is ceramic.

4. The susceptor material of claim 1 in which the dielectric binder is polymeric.

5. The susceptor material of claim 4 in which the polymeric binder comprises a polymer chosen from a fourth group consisting of polyethylenes, polypropylenes, polymethylmethacrylates, urethanes, cellulose acetates, and polytetrafluoroethylene.

6. The susceptor material of claim 4 in which the polymeric binder comprises a polymer chosen from a fifth group consisting of thermosetting polymeric adhesives and thermoplastic polymeric adhesives.

7. The susceptor material of claim 4 in which the polymeric binder comprises a polymer chosen from a sixth group consisting of heat-shrinkable polymers, solvent-shrinkable polymers, and mechanically-stretchable polymers.

8. The susceptor material of claim 1 in which the dielectric binder is elastomeric.

9. The susceptor material of claim 1 in which said at least one of the species of particles is dispersed in the dielectric binder at a volume loading between one and fifty percent.

10. The susceptor material of claim 1 in which the susceptor material is bounded to a substrate.

11. The susceptor material of claim 10 in which the susceptor material is bounded as bound to an electrically conductive substrate.

12. A laminated construction comprising at least two laminae of an electromagnetic radiation susceptor material, each lamina comprising at least one of a species of particles dispersed in a dielectric binder material, in which at least one of the species of particles comprises a ferromagnetic amorphous alloy having a composition F_100-y-x M_y TM_x, where F is at least one of any magnetic element selected from a first group consisting of Fe, Co, and Ni;

M is at least one metalloid selected from a group consisting of B, C, Al, Si, P, Ge and As;

TM is at least one of any transition metal selected from columns IIIB to VIIB of the periodic table;

0≦

x≦

20; and

10≦

y≦

30.