METALLIZED COIL BODIES (INDUCTOR) HAVING HIGH Q-VALUE
The invention relates to a body made of ceramic materials, having a basic metallization made of at least one electrically conductive material, such as tungsten/glass or molybdenum/glass compounds and an adhesive, electrically conductive and corrosion-resistant coating. In order to improve energy losses, which is to say to increase the Q-factor, it is proposed that the coating comprises/carries at least one functional layer made of a metal or several metals, having lower specific electrical resistance than the electrically conductive material and the remaining constituents of the coating.
1 - 14 . (canceled)
15 . A body comprising a ceramic substances with a base metallization consisting of at least one electrically conductive material, such as tungsten-glass or molybdenum-glass compounds, for example, and an adhesive, electrically conductive and corrosion-resistant coating, wherein the coating comprises at least one functional layer consisting of a metal or a plurality of metals with an electrical resistivity which is lower than that of the electrically conductive material and the remaining constituents of the coating.
16 . The body as claimed in claim 15 , wherein the coating comprises at least two layers.
17 . The body as claimed in claim 15 , wherein the base metallization contains at least one refractory metal.
18 . The body as claimed in claim 15 , wherein the base metallization comprises tungsten-glass or molybdenum-glass compounds.
19 . The body as claimed in claim 15 , wherein the coating comprises a nickel and a gold layer.
20 . The body as claimed in claim 15 , wherein at least one functional layer is arranged between the layers of the coating.
21 . The body as claimed claim 15 , wherein the nickel layer contained in the coating has a thickness of 0.5-2 μm.
22 . The body as claimed in claim 15 , wherein the nickel layer contained in the coating has a resistivity of from 4 to 10*10 −8 ohm*m.
23 . The body as claimed in claim 15 , wherein the functional layer consisting of a metal with a low electrical resistivity is a copper layer.
24 . The body as claimed in claim 23 , wherein the copper layer has a thickness of from 1-10 μm.
25 . The body as claimed in claim 23 , wherein the copper layer has a resistivity of from 1.0 to 2.6*10 −8 ohm*m.
26 . The body as claimed in claim 15 , wherein the ceramic substance comprises aluminum oxide.
27 . The body as claimed in claim 15 , wherein the base metallization is dispensed with and the coating performs the function thereof.
28 . A coil former or inductor comprising a body as claimed in claim 15 .
29 . The body as claimed in claim 15 , wherein the base metallization comprises at least one of tungsten or molybdenum.
30 . The body as claimed in claim 15 , wherein the nickel layer contained in the coating has a resistivity of from 7*10 −8 ohm*m.
25 . The body as claimed in claim 23 , wherein the copper layer has a resistivity of from 1.8*10 −8 ohm*m.
26 . The body as claimed in claim 15 , wherein the ceramic substance comprises 96% aluminum oxide.