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Thermal Noise Sensor Insulation Using Ultra-thin Ceramic Coatings

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Abstract

The insulation resistance and interference rejection of several prototype thermal noise sensors were measured. It was found that twisting the connecting wires as a pair optimizes the magnetic interference rejection. High-temperature-resistant wire insulation was developed by vapor depositing a few micrometer thick ceramic coating. The best insulation was obtained with a coating of 1.25μm SiO2 + 1.5μm TiO2 + 0.25μm ZrO2. The insulation of four such coated pairs reached stable levels of 18 ± 3kΩ during a testing period of 1 week at 950°C under atmospheric conditions.

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Authors and Affiliations

  1. Nederlands Meetinstituut, Van Swinden Laboratorium, Thijsseweg 11, 2629 JA, Delft, The Netherlands

    O. Kerkhof & E. Houtzager

  2. Tempcontrol Industrial Electronic Products, van Alphenstraat 63s, 2274 NC, Voorburg, The Netherlands

    J. v. Wensveen

  3. Everest Coatings, Röntgenweg 1, 2624 BD, Delft, The Netherlands

    E. Maloney

Authors
  1. O. Kerkhof
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  2. E. Houtzager
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  3. J. v. Wensveen
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  4. E. Maloney
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Correspondence to O. Kerkhof.

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Kerkhof, O., Houtzager, E., Wensveen, J.v. et al. Thermal Noise Sensor Insulation Using Ultra-thin Ceramic Coatings. Int J Thermophys 29, 1156–1165 (2008). https://doi.org/10.1007/s10765-008-0401-5

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  • DOI: https://doi.org/10.1007/s10765-008-0401-5

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