Temperature Probe and Method for Producing a Temperature Probe

Patent metadata

Field	Value
Publication number	US-2016265979-A1
Application number	US-201314442365-A
Country	US
Kind code	A1
Filing date	Sep 27, 2013
Priority date	Nov 12, 2012
Publication date	Sep 15, 2016
Grant date	—

Abstract

The invention relates to a temperature probe which comprises a functional ceramic probe element and a ceramic housing. The probe element is mounted in the ceramic housing so that at a face of the probe element has direct and form-fitting contact with the ceramic housing. The invention further relates to a method for producing a temperature probe.

First claim

1 - 14 . (canceled)

15 . A temperature probe, comprising:
a functional ceramic sensor element; and a ceramic housing, wherein the ceramic sensor element is arranged in the ceramic housing so that a side face of the sensor element comprises a direct and positive locking contact with the ceramic housing.

16 . The temperature probe according to claim 15 , wherein the ceramic housing is an injection molded housing.

17 . The temperature probe according to claim 16 , further comprising two contact elements, wherein each contact element is electrically connected to the sensor element, and wherein the contact elements project out of the ceramic housing;
wherein the ceramic housing comprises:
an opening at one end; and
a cavity comprising a bottom surface on an opposite side of the housing from the opening, and a step-shaped indentation, wherein the step-shaped indentation comprises a main region and two side pockets which adjoin two opposite sides of the main region, and wherein the sensor element is arranged at least in part in the main region and each of the contact elements is arranged at least in part in one of the side pockets; and
wherein the sensor element comprises two electrodes, and wherein the contact elements are electrically connected to an electrode of the sensor element by a burnt on metallization paste which is arranged in the side pockets.

18 . The temperature probe according to claim 15 , wherein the ceramic housing comprises:
an opening at one end; and a cavity comprising a bottom surface on an opposite side of the housing from the opening and a step-shaped indentation, wherein the sensor element is arranged at least partially in the indentation.

19 . The temperature probe according to claim 18 , wherein the step-shaped indentation comprises a main region and two side pockets which adjoin two opposite sides of the main region, and wherein the sensor element is arranged at least in part in the main region.

20 . The temperature probe according to claim 19 , further comprising two contact elements, wherein each of the contact elements is arranged at least in part in one of the side pockets and each is electrically connected to the sensor element, and wherein the contact elements project out of the ceramic housing.

21 . The temperature probe according to claim 20 , wherein the sensor element comprises two electrodes, and wherein the contact elements are electrically connected to an electrode of the sensor element by a burnt on metallization paste which is arranged in the side pockets.

22 . The temperature probe according to claim 15 , wherein an opening of the ceramic housing is closed by means of a glass sealant.

23 . The temperature probe according to claim 15 , wherein the functional ceramic sensor element is an NTC element or a PTC element.

24 . The temperature probe according to claim 15 , wherein the sensor element comprises one of the following structures: a perovskite structure including elements Y, Ca, Cr, Al and O, or a spinel structure including elements Ni, Co, Mn and O.

25 . The temperature probe according to claim 15 , wherein the ceramic housing comprises a wall with thicknesses of between 0.1 mm and 1 mm.

26 . The temperature probe according to claim 15 , wherein the ceramic housing comprises aluminum oxide.

27 . A method for producing a temperature probe, comprising:
providing a functional ceramic sensor element comprising electrodes; preparing a ceramic raw material and forming the ceramic raw material into a green body using an injection molding method; sintering the green body to form a ceramic housing; and arranging the sensor element in the ceramic housing so that a side face of the sensor element comprises a direct and positive locking contact with the ceramic housing.

28 . The method according to claim 27 , wherein contact elements are electrically connected to the electrodes by burning on metallization pastes.

29 . The method according to claim 27 , wherein an opening of the ceramic housing is closed by burning on a glass paste.

30 . A method of making a temperature probe, comprising:
providing a functional ceramic sensor element; and arranging the ceramic sensor element in a ceramic housing so that a side face of the sensor element comprises a direct and positive locking contact with the ceramic housing.

31 . The method according to claim 30 , wherein the ceramic housing comprises:
an opening at one end; and a cavity comprising a bottom surface on an opposite side of the housing from the opening and a step-shaped indentation, wherein the sensor element is arranged at least partially in the indentation.

32 . The method according to claim 30 , wherein the ceramic housing is an injection molded housing.

33 . The method according to claim 30 , wherein the functional ceramic sensor element is an NTC element or a PTC element.

34 . The method according to claim 30 , wherein the functional ceramic sensor element comprises one of the following structures: a perovskite structure including elements Y, Ca, Cr, Al and O, or a spinel structure including elements Ni, Co, Mn and O.

Assignees

• Epcos Ag

Inventors

• Ihle Jan
• Kloiber Gerald

Classifications

• G01K7/223

  characterised by the shape of the resistive element · CPC title

• G01K1/08 Primary

  Protective devices, e.g. casings · CPC title

• G01K7/22

  the element being a non-linear resistance, e.g. thermistor (G01K7/26 takes precedence) · CPC title

• C04B35/64

  Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title

• C04B35/10

  based on aluminium oxide · CPC title