FR2475724A1 - Measuring resistance for thermometer - comprises thin resistive wires passing through perforations in insulating body and fixed to ceramic plate by glass bonding - Google Patents

Measuring resistance for thermometer - comprises thin resistive wires passing through perforations in insulating body and fixed to ceramic plate by glass bonding Download PDF

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Publication number
FR2475724A1
FR2475724A1 FR8101304A FR8101304A FR2475724A1 FR 2475724 A1 FR2475724 A1 FR 2475724A1 FR 8101304 A FR8101304 A FR 8101304A FR 8101304 A FR8101304 A FR 8101304A FR 2475724 A1 FR2475724 A1 FR 2475724A1
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FR
France
Prior art keywords
ceramic plate
insulating body
ceramic
perforations
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8101304A
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French (fr)
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FR2475724B1 (en
Inventor
Walter Diehl
Ewald Roser
Karlheinz Eckert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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Filing date
Publication date
Application filed by Degussa GmbH filed Critical Degussa GmbH
Publication of FR2475724A1 publication Critical patent/FR2475724A1/en
Application granted granted Critical
Publication of FR2475724B1 publication Critical patent/FR2475724B1/fr
Granted legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
    • G01K7/183—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer characterised by the use of the resistive element

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Thermistors And Varistors (AREA)

Abstract

The resistance is formed by a thin resistive layer on a ceramic plate protected by an insulating layer which avoids a high temperature drop across it. The layer remains stable at temperatures exceeding 500 degrees C. The measuring resistance comprises a ceramic plate which supports a resistive strip to which conducting wires are welded. These wires pass via perforations in a ceramic insulating body and are fixed onto the ceramic plate by glass bonding which takes the mechanical forces applied to the wires. The resistive area is covered by an insulating layer of ceramic glass which is applied by a fusion process.

Description

L'invention concerne une résistance de mesure pour thermomètre à résistance, constituée d'une plaquette de céramique portant une mince couche résistante, comportant des fils conducteurs soulagés, des efforts mécaniques et une couche isolante protégeant la couche résistante. The invention relates to a measurement resistor for a resistance thermometer, consisting of a ceramic plate carrying a thin resistant layer, comprising relieved conductive wires, mechanical forces and an insulating layer protecting the resistant layer.

On connaît déjà des résistances de mesure constituées par une plaquette en céramique comme support et un mince revêtement métallique formant couche résistante, (par exemple brevet
DE828 930, document DE 2 327 662, modélesd'utilité DE 75 41 295 & BR< 76 29 727). On peut établir la liaison électrique entre la couche formant résistance et les fils de raccordement suivant l'un des procédés connus de liaison tels que soudage, brasage, application par frittage avec une pâte conductrice, ou collage. Il est cependant nécessaire de prendre des mesures supplémentaires pour soulager le point de liaison glectrique des efforts mécaniques.Measuring resistors already known are constituted by a ceramic plate as a support and a thin metallic coating forming a resistant layer (for example patent
DE828 930, document DE 2 327 662, utility models DE 75 41 295 & BR <76 29 727). The electrical connection can be established between the resistance layer and the connection wires according to one of the known connection methods such as welding, soldering, application by sintering with a conductive paste, or bonding. However, it is necessary to take additional measures to relieve the glectric connection point from mechanical stress.

Dans un mode de réalisation connu d'une résistance de mesure plate de ce genre, (modèle d'usage DE 76 29 727) , on obtient ce résultat en faisant passer les fils conducteurs dans un corps isolant court et en les réunissant, en commun avec ce corps, par fusion.d'une glaçure frittée, avec la couche résistante et la plaquette en céramique. La glaçure frittée nécessaire pour réunir patfusion le corps isolant et la plaquette de céramique est ici étalez, comme revêtement protecteur sur la couche résistante. Ce mode de réalisation offre l'avantage que l'on peut opérer la fixation par fusion du corps isolant et l'isolation de la bande résis tante -en -une seule et même opération. In a known embodiment of a flat measuring resistor of this kind (usage model DE 76 29 727), this result is obtained by passing the conducting wires through a short insulating body and bringing them together, in common with this body, by fusion. of a sintered glaze, with the resistant layer and the ceramic plate. The sintered glaze necessary to unite the insulating body and the ceramic plate is spread here, as a protective coating on the resistant layer. This embodiment has the advantage that the fixing by fusion of the insulating body and the insulation of the resistive strip can be carried out in one and the same operation.

L'inconvenient de cette construction est toutefois que l'on ne peut utiliser que.des glaçures frittées qui fondent une température pas trop élevée et qui mouillent bien la céramique. The disadvantage of this construction is, however, that one can only use sintered glazes which melt at a temperature not too high and which wet the ceramic well.

De ce fait, toutefois, la température maximale de mise en service permanente de la résistance de mesure plate est limitée 9 environ 5000 C,. car la bande résistante ne founit dans beaucoup de cas, même si elle est constituée en un métal noble, aucune valeur de résistance électrique stable quand elle est en contact avec une glaçure frittée de ce genre des températures élevées..Because of this, however, the maximum permanent commissioning temperature of the flat measuring resistor is limited to about 5000 C,. because the resistant strip provides in many cases, even if it is made of a noble metal, no stable electrical resistance value when it is in contact with a sintered glaze of this kind at high temperatures.

L'invention a en conséquence pour but de réaliser une résistance de mesure pour thermomètre à résistance, constituée par une plaquette de céramique portant une couche mince résistante et comportant des fils conducteurs soulagés des efforts mécaniques et une couche isolante protégeant la couche résistante, qui reste stable électriquement même à des températures supérieures à 500 C.  The object of the invention is therefore to provide a measurement resistor for a resistance thermometer, consisting of a ceramic plate carrying a thin resistant layer and comprising conductive wires relieved of mechanical stresses and an insulating layer protecting the resistant layer, which remains electrically stable even at temperatures above 500 C.

A cet effet, l'invention est caractérisé par des fils conducteurs passant dans les perforations d'un corps isolant et fixés par soudage, avec ce dernier, sur la plaquette céramique au moyen d'une glaçure frittée, la bande résistante étant revêtue d'une couche isolante de céramique de verre cuite. To this end, the invention is characterized by conductive wires passing through the perforations of an insulating body and fixed by welding, with the latter, to the ceramic wafer by means of a sintered glaze, the resistant strip being coated with an insulating layer of fired glass ceramic.

Les figures 1 et 2 montrent schématiquement , en coupe longitudinale et en plan, un mode de réalisation, donné a titre d'exemple, de la résistance de mesure suivant l'invention. Figures 1 and 2 schematically show, in longitudinal section and in plan, an embodiment, given by way of example, of the measurement resistor according to the invention.

La résistance de mesure est constituée par une plaquette de céramique (1), qui porte une bande résistante (2) sinueuse en platine sur laquelle sont fixés les fils conducteurs (3 & 4). Ces fils conducteurs (3 & 4) passent dans des perforations d'un corps isolant (5) en céramique et sont fixés sur la plaquette en céramique (1) au moyen d'une glaçure frittée (1). La zone de la bande résistante (2) en platine est recouverte d'une couche isolante (7) en céramique de verre capable d'être appliquée par sérigraphie et cuite.  The measurement resistor consists of a ceramic plate (1), which carries a sinuous platinum resistance band (2) on which the conductor wires (3 & 4) are fixed. These conductive wires (3 & 4) pass through perforations in an insulating body (5) made of ceramic and are fixed to the ceramic plate (1) by means of a sintered glaze (1). The zone of the resistant strip (2) in platinum is covered with an insulating layer (7) of glass ceramic capable of being applied by screen printing and fired.

Claims (1)

R E V E N D I C A T I O N S R E V E N D I C A T I O N S ,Résistance de mesure pour thermomètre à résistance, constituée par une plaquette en céramique portant une mince couche résistante contenant des fils conducteurs soulagés des efforts mécaniques, et une couche isolante protégeant la couche formant la résistance, résistance caractérisée en ce que les fils conducteurs (3,4) passent dans des perforations d'un corps isolant (5), et sont fixés avec ce dernier sur la plaquette en céramique (1) au moyen d'une glaçure frittée (6) que l'on fait fondre, la bande résistante (2) etant recouverte par une couche isolante (7) en céramique de verre cuite.  , Measuring resistor for resistance thermometer, consisting of a ceramic plate carrying a thin resistant layer containing conductive wires relieved of mechanical forces, and an insulating layer protecting the layer forming the resistance, resistance characterized in that the conductive wires (3 , 4) pass through perforations of an insulating body (5), and are fixed with the latter on the ceramic plate (1) by means of a sintered glaze (6) which is melted, the resistant strip (2) being covered by an insulating layer (7) of fired glass ceramic.
FR8101304A 1980-02-09 1981-01-23 Measuring resistance for thermometer - comprises thin resistive wires passing through perforations in insulating body and fixed to ceramic plate by glass bonding Granted FR2475724A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19808003431 DE8003431U1 (en) 1980-02-09 1980-02-09 MEASURING RESISTANCE FOR RESISTANCE THERMOMETER

Publications (2)

Publication Number Publication Date
FR2475724A1 true FR2475724A1 (en) 1981-08-14
FR2475724B1 FR2475724B1 (en) 1984-03-23

Family

ID=6712731

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8101304A Granted FR2475724A1 (en) 1980-02-09 1981-01-23 Measuring resistance for thermometer - comprises thin resistive wires passing through perforations in insulating body and fixed to ceramic plate by glass bonding

Country Status (3)

Country Link
JP (1) JPS622726Y2 (en)
DE (1) DE8003431U1 (en)
FR (1) FR2475724A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354598A2 (en) * 1985-12-04 1990-02-14 MANNESMANN Aktiengesellschaft Probe for the thermal mass flow measurement of gases and liquids
US4972708A (en) * 1983-01-22 1990-11-27 Leybold Aktiengesellschaft Thermal mass flow-meter particularly for gases
WO1999049285A1 (en) * 1998-03-26 1999-09-30 Sensotherm Temperatursensorik Gmbh Sensor component
CN110573848A (en) * 2017-05-01 2019-12-13 世美特株式会社 Temperature sensor and device provided with temperature sensor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH673061A5 (en) * 1987-07-13 1990-01-31 Landis & Gyr Gmbh Resistance thermometer with unstressed sensing element in housing - has annular grooves around sheath of cable end pressed into housing protecting element against bending stresses
JP2559875B2 (en) * 1990-03-16 1996-12-04 日本碍子株式会社 Resistor element
DE19633486C1 (en) * 1996-08-20 1998-01-15 Heraeus Sensor Nite Gmbh Manufacturing method for circuit board with thin conduction paths and good solderable connection-contact regions e.g for measurement resistor or heating element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7629727U1 (en) * 1976-09-23 1976-12-30 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt MEASURING RESISTOR FOR RESISTANCE THERMOMETER

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7629727U1 (en) * 1976-09-23 1976-12-30 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt MEASURING RESISTOR FOR RESISTANCE THERMOMETER

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972708A (en) * 1983-01-22 1990-11-27 Leybold Aktiengesellschaft Thermal mass flow-meter particularly for gases
EP0354598A2 (en) * 1985-12-04 1990-02-14 MANNESMANN Aktiengesellschaft Probe for the thermal mass flow measurement of gases and liquids
EP0354598A3 (en) * 1985-12-04 1990-09-05 Degussa Aktiengesellschaft Probe for the thermal mass flow measurement of gases and liquids
WO1999049285A1 (en) * 1998-03-26 1999-09-30 Sensotherm Temperatursensorik Gmbh Sensor component
CN110573848A (en) * 2017-05-01 2019-12-13 世美特株式会社 Temperature sensor and device provided with temperature sensor
US11460353B2 (en) 2017-05-01 2022-10-04 Semitec Corporation Temperature sensor and device equipped with temperature sensor

Also Published As

Publication number Publication date
FR2475724B1 (en) 1984-03-23
DE8003431U1 (en) 1980-05-14
JPS56117505U (en) 1981-09-08
JPS622726Y2 (en) 1987-01-22

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