Material having a predeterminable magnetic susceptibility
First Claim
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1. A rigid material having a magnetic susceptibility, the material comprising:
- a plastic mass as primary substance and binding agent,an additive substance including a paramagnetic material having a first magnetic susceptibility and a plurality of small hollow balls made of a material having a second magnetic susceptibility less than said first magnetic susceptibility;
said small hollow balls having a diameter smaller than the size of a workpiece made of the material; and
,said plastic mass and said additive substance being mixed in a mixing ratio for forming a rigid structure for the workpiece.
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Abstract
The invention is directed to a material having predeterminable magnetic suceptibility and this material is suitable for producing displacing bodies for oxygen measuring devices. The material is composed of a plastic mass as primary substance and binding agent and, in any desired mixing ratio, at least one of the following additive substances: small hollow bodies, a paramagnetic material and a light ferromagnetic material.
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Citations
8 Claims
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1. A rigid material having a magnetic susceptibility, the material comprising:
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a plastic mass as primary substance and binding agent, an additive substance including a paramagnetic material having a first magnetic susceptibility and a plurality of small hollow balls made of a material having a second magnetic susceptibility less than said first magnetic susceptibility; said small hollow balls having a diameter smaller than the size of a workpiece made of the material; and
,said plastic mass and said additive substance being mixed in a mixing ratio for forming a rigid structure for the workpiece.
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2. The material of claim 1, said plastic means being epoxy resin.
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3. The material of claim 1, said small hollow balls being hollow glass balls.
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4. The material of claim 3, said hollow glass balls having a diameter in the range of 30 to 180 micrometers and having a wall thickness of approximately 1.5 micrometers.
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5. The material of claim 1, said paramagnetic material being samarium (III) oxide (Sm2 O3).
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6. The material of claim 1, said paramagnetic material being ferriphosphate (FePO4).
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7. The material of claim 3, wherein the additive substance includes 68 percent by weight of an epoxy resin, 13 percent by weight of a hardener and 18 percent by weight of said hollow glass balls having a diameter in the range of 30 to 180 micrometers and 1 percent by weight of ferriphosphate whereby a vanishing magnetic susceptibility is obtained.
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8. In an apparatus for measuring the oxygen content of a gas which includes a displacing body for displacing the gas through the apparatus, a rigid material having a magnetic susceptibility, the material comprising:
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a plastic mass as primary substance and binding agent, an additive substance including a paramagnetic material having a first magnetic susceptibility and a plurality of small hollow balls made of a material having a second magnetic susceptibility less then said first magnetic susceptibility; said small hollow balls having a diameter smaller than the size of the displacing body; and
,said plastic mass and said additive substance being mixed in a mixing ratio to provide a rigid structure for the displacing body.
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Specification