EP1443298A1 - Heizelement zum Zünden pyrotechnischer Ladungen - Google Patents
Heizelement zum Zünden pyrotechnischer Ladungen Download PDFInfo
- Publication number
- EP1443298A1 EP1443298A1 EP04100151A EP04100151A EP1443298A1 EP 1443298 A1 EP1443298 A1 EP 1443298A1 EP 04100151 A EP04100151 A EP 04100151A EP 04100151 A EP04100151 A EP 04100151A EP 1443298 A1 EP1443298 A1 EP 1443298A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- sintered
- glass
- base body
- mass
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 51
- 230000000977 initiatory effect Effects 0.000 title 1
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000007650 screen-printing Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 101100434911 Mus musculus Angpt1 gene Proteins 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims description 2
- 238000005524 ceramic coating Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
Definitions
- the present invention relates to a heating element for Igniting pyrotechnic charges consisting of a Basic body, a textured resistive layer, on the main body is arranged, and contact fields, the overlapping on the two ends of the resistor track are arranged. It further relates to a method for Production of a heating element, where appropriate first glass or glass ceramic by screen printing process is printed on a base body and then dried and is sintered, these steps being repeated until the desired total layer thickness has been reached; after that the resistance paste by screen printing on the Glass ceramic substrate or coating is printed and then dried and sintered; and after that the Conductor paste as contacting by screen printing process overlapping over the resistor track is printed and after dried and sintered.
- the company Dynamit Nobel AG has been providing for many years Heating elements in layer technology (thin layer, sputtered on) for detonators in military use and mining (DE 2020016 A1). This type of heating element can be used in the automotive sector only with additional expenditure (external Wiring).
- the specifications to be met are e.g. the USCAR (Chrysler, General Motors and Ford) and the VW80150 (Volkswagen).
- USCAR Chorysler, General Motors and Ford
- VW80150 Volkswagen
- In addition to the demands of environmental simulation (Climate change tests and mechanical load) are for the Heating element the electrical requirements (sensitivity during ignition and resistance to interference pulses) of highest importance. These tests are on detonators to carry out (heating element with pyrotechnic composition according to Requirements of the automotive industry installed).
- the sensitivity during ignition is called by Determined "all-fire” and "no-fire” tests (e.g., Bruceton, Logit, run-down).
- all-fire and "no-fire” tests (e.g., Bruceton, Logit, run-down).
- the detonator with Ignite a constant current pulse of 1.2 A for 2 ms (with a certain statistical probability).
- the igniter may be used with a constant current pulse of 0.5 A. do not ignite over 10 s (with a given statistical Probability).
- Interference pulses are predetermined amounts of energy which are within a defined time and with a specific time Refresh rate can be introduced.
- Example ESD interference pulse according to USCAR capacitor with 150 pF charged to 25 kV via a series resistor with 500 ⁇ across discharge the igniter with the heating element (2 ⁇ ) installed.
- Example transient pulse according to USCAR current pulses with 5.3 A, a pulse duration of 4 ⁇ s (rise time 1 ⁇ s, cooldown) 3 ⁇ s) and a duty cycle of 1: 1000 over 24 h on the Igniter with installed heating element (2 ⁇ ) introduced.
- a heating element of the type mentioned in the present invention characterized in that the mass of the heating element of 1.0 ⁇ 10 -9 kg to 4.0 ⁇ 10 -9 kg, the resistivity of 1 ⁇ 10 -6 ⁇ m to 2 ⁇ 10 -6 ⁇ m and the specific heat capacity of the heating element is from 100 W / (kg ⁇ K) to 400 W / (kg ⁇ K).
- the main difference to the heating element according to the AT 405591 B is that the mass is much larger (more than 10 times) and the resistivity also substantially is much higher (more than 20 times). In this way results in a similar total resistance (the of the Automotive industry is given), but due to the higher mass increases the temperature of the heating element less, if by interference energy in the heating element is released so that the pyrotechnic charge is not can ignite or the heating element can not be destroyed can.
- the cross section of the heating element is preferably 3.5 ⁇ 10 -10 m 2 to 7.0 ⁇ 10 -10 m 2 .
- This cross section is favorable in order to achieve usual resistance values, eg 2 ⁇ .
- These materials are particularly suitable in the inventive composition to provide suitable resistance values.
- the rest contains oxidic additives and glass phase.
- the resistor paste contains usually also an organikum before sintering.
- Preferred material for the contact pads is sintered AgPd or AgPt thick film conductor paste with a Pd or Pt content between 1 and 10 mass%.
- the rest contains oxidic additives and glass phase.
- the conductor paste contains before sintering usually also an organic.
- the resistance layer after the Applying the contact by means of programmable Laser source is structured.
- appropriate shaping the resistance path by means of programmable laser source is by individual shaping the heating rate (Energy transfer) individually adjustable. This Structuring can affect both the basic form of Glow bridge by cutting out the appropriate geometry as well as the height by area-related removal relate. Compared to the etching is the shaping with a Laser source much more flexible. A change in the Production is in a very short time only by one Program change possible, while etching a new Etch mask must be created.
- the present invention provides a heating element and a Method with corresponding material combinations, which have not yet been realized in layering technology and the Specifications of the automotive industry without additional Electronics is fair.
- the proof of the resistance to ESD interference pulses and Transient pulse to USCAR can be by means of thermodynamic Calculation and subsequent numerical simulation be performed.
- thermodynamic Heat equation Due to the analogy of the thermodynamic Heat equation with the differential equations of an electrical conductor (telegraph equation) can after Transformation of the thermodynamic quantities into electrical ones Sizes an exact one-dimensional simulation of the thermal Conditions (temperature and heat quantities) over time be performed.
- the temperature of the heating element is T (in ° C) as a function of time t (in s).
- the solid line refers to the heating element "so far", the dashed line on the heating element "new”.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Air Bags (AREA)
- Surface Heating Bodies (AREA)
Abstract
Description
Thermische Abschätzung des Heizelements ohne Wärmeableitung über
Material | Q [J] | Masse [kg] | cp [W/(kg·K)] | ΔT [°C] |
"bisher": Au/Pd-Resinat | 7,48 10-5 | 1,09 10-10 | 129 | 5319 |
"neu": Ag/Pd-Widerstand | 1,40 10-4 | 1,92 10-9 | 337 | 217 |
Claims (8)
- Heizelement zum Zünden pyrotechnischer Ladungen bestehend aus einem Grundkörper, einer strukturierten Widerstandsschicht, die auf dem Grundkörper angeordnet ist, und Kontaktfeldern, die überlappend auf den beiden Enden der Widerstandsbahn angeordnet sind, dadurch gekennzeichnet, dass die Masse des Heizelements von 1,0·10-9 kg bis 4,0·10-9 kg, der spezifische Widerstand von 1·10-6 Ωm bis 2·10-6 Ωm und die spezifische Wärmekapazität des Heizelements von 100 W/(kg·K) bis 400 W/(kg·K) beträgt.
- Heizelement nach Anspruch 1, dadurch gekennzeichnet, dass der Querschnitt des Heizelements 3,5·10-10 m2 bis 7,0·10-10 m2 beträgt.
- Heizelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Widerstandsschicht aus gesinterter Ag/Pd-Widerstandspaste oder gesinterter Ag/Au/Pd-Widerstandspaste mit 30-50 Masse-% Ag und 35-50 Masse-% Pd oder aus gesinterter Pt/W-Widerstandspaste mit 70-90 Masse-% Pt und 5-20 Masse-% W besteht.
- Heizelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Grundkörper aus einem hochtemperaturfesten Glas oder einer Glaskeramik oder einer Keramik mit thermischer Wärmeleitfähigkeit von höchstens 2 W/(m·K) besteht.
- Heizelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Grundkörper aus einem hochtemperaturfesten Glas oder einer Glaskeramik oder einer Keramik mit thermischer Wärmeleitfähigkeit von höchstens 3 W/(m·K) besteht und auf dem Grundkörper eine Wärmebarriere aufgebracht ist, bestehend aus Glas- oder Glaskeramikbeschichtung mit 20-80 µm Dicke und mit einer thermischen Wärmeleitfähigkeit von höchstens 1,5 W/(m·K).
- Heizelement nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Kontaktfelder aus gesinterter AgPd- oder AgPt-Dickschichtleiterpaste mit einem Pd- bzw. Pt-Anteil zwischen 1 und 10 Masse-% bestehen.
- Verfahren zur Herstellung eines Heizelements nach einem der Ansprüche 1 bis 6, bei dem gegebenenfalls zunächst Glas oder Glaskeramik mittels Siebdruckverfahrens auf einen Grundkörper gedruckt wird und danach getrocknet und gesintert wird, wobei diese Schritte wiederholt werden, bis die gewünschte Gesamtschichtstärke erreicht ist; wobei danach die Widerstandspaste mittels Siebdruckverfahrens auf das Glaskeramiksubstrat bzw. Beschichtung gedruckt wird und danach getrocknet und gesintert wird; und wobei danach die Leiterpaste als Kontaktierung mittels Siebdruckverfahrens überlappend über die Widerstandsbahn gedruckt wird und danach getrocknet und gesintert wird, dadurch gekennzeichnet, dass danach die Widerstandsschicht mittels einer programmierbaren Laserquelle strukturiert wird.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass durch Nachsintern mit 800°C-900°C Spitzentemperatur über 10 bis 20 min nach dem Sintern der Widerstandsbahn oder nach dem Sintern der Leiterbahn oder nach der Strukturierung das Zündelement in seiner Stabilität gegenüber hohen elektrischen und thermischen Belastungen verbessert wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0011703A AT413150B (de) | 2003-01-28 | 2003-01-28 | Heizelement zum zünden pyrotechnischer ladungen |
AT1172003 | 2003-01-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1443298A1 true EP1443298A1 (de) | 2004-08-04 |
EP1443298B1 EP1443298B1 (de) | 2007-10-10 |
Family
ID=32601373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04100151A Expired - Lifetime EP1443298B1 (de) | 2003-01-28 | 2004-01-19 | Heizelement zum Zünden pyrotechnischer Ladungen |
Country Status (4)
Country | Link |
---|---|
US (1) | US7089861B2 (de) |
EP (1) | EP1443298B1 (de) |
AT (2) | AT413150B (de) |
DE (1) | DE502004005169D1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL176454A0 (en) * | 2006-06-21 | 2007-06-03 | Benjamin Keren | Explosive material sensitivity control |
CN109222685B (zh) * | 2018-09-27 | 2022-03-18 | 九阳股份有限公司 | 一种豆浆机的控制方法 |
CN111521070A (zh) * | 2020-04-29 | 2020-08-11 | 西安工业大学 | 一种碳基低压点火开关制备方法 |
CN113140381A (zh) * | 2021-04-07 | 2021-07-20 | 深圳顺络电子股份有限公司 | 一种点火电阻的制作方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2020016A1 (de) | 1970-04-24 | 1971-11-11 | Dynamit Nobel Ag | Metallschichtzuendmittel |
US4708060A (en) | 1985-02-19 | 1987-11-24 | The United States Of America As Represented By The United States Department Of Energy | Semiconductor bridge (SCB) igniter |
US4976200A (en) | 1988-12-30 | 1990-12-11 | The United States Of America As Represented By The United States Department Of Energy | Tungsten bridge for the low energy ignition of explosive and energetic materials |
AT405591B (de) | 1997-10-03 | 1999-09-27 | Schaffler & Co | Heizelement und verfahren zu dessen herstellung |
US6230624B1 (en) * | 1999-08-13 | 2001-05-15 | Trw Inc. | Igniter having a hot melt ignition droplet |
US20020069780A1 (en) * | 2000-12-07 | 2002-06-13 | Bos Laurence W. | Thin film resistor fabricated on header |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE405591C (de) | 1921-07-08 | 1924-11-04 | Siemens Schuckertwerke G M B H | Einrichtung zum Betriebe von Kraftwerken mit mehreren Einheiten |
US3753403A (en) * | 1968-09-19 | 1973-08-21 | Us Navy | Static discharge for electro-explosive devices |
DE2002016A1 (de) | 1970-01-17 | 1971-07-22 | Messerschmitt Boelkow Blohm | Doppeltwirkende Fluegelzellenpumpe |
FR2538099B1 (fr) * | 1982-12-15 | 1986-10-03 | France Etat | Amorce electrique a element resistif |
US4522665A (en) * | 1984-03-08 | 1985-06-11 | Geo Vann, Inc. | Primer mix, percussion primer and method for initiating combustion |
US4893563A (en) * | 1988-12-05 | 1990-01-16 | The United States Of America As Represented By The Secretary Of The Navy | Monolithic RF/EMI desensitized electroexplosive device |
JP2971439B2 (ja) * | 1998-04-21 | 1999-11-08 | 東芝ホクト電子株式会社 | 着火装置およびその製造方法 |
FR2790078B1 (fr) * | 1999-02-18 | 2004-11-26 | Livbag Snc | Allumeur electropyrotechnique a securite d'allumage renforcee |
FR2800865B1 (fr) * | 1999-11-05 | 2001-12-07 | Livbag Snc | Initiateur pyrotechnique a filament photograve protege contre les decharges electrostatiques |
US6324979B1 (en) * | 1999-12-20 | 2001-12-04 | Vishay Intertechnology, Inc. | Electro-pyrotechnic initiator |
US6341562B1 (en) * | 2000-02-22 | 2002-01-29 | Autoliv Asp, Inc. | Initiator assembly with activation circuitry |
FR2827377B1 (fr) * | 2001-07-13 | 2003-12-05 | Poudres & Explosifs Ste Nale | Dispositif d'allumage pour microcharges pyrotechniques |
-
2003
- 2003-01-28 AT AT0011703A patent/AT413150B/de not_active IP Right Cessation
-
2004
- 2004-01-19 DE DE502004005169T patent/DE502004005169D1/de not_active Expired - Lifetime
- 2004-01-19 AT AT04100151T patent/ATE375494T1/de not_active IP Right Cessation
- 2004-01-19 EP EP04100151A patent/EP1443298B1/de not_active Expired - Lifetime
- 2004-01-26 US US10/765,457 patent/US7089861B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2020016A1 (de) | 1970-04-24 | 1971-11-11 | Dynamit Nobel Ag | Metallschichtzuendmittel |
US4708060A (en) | 1985-02-19 | 1987-11-24 | The United States Of America As Represented By The United States Department Of Energy | Semiconductor bridge (SCB) igniter |
US4976200A (en) | 1988-12-30 | 1990-12-11 | The United States Of America As Represented By The United States Department Of Energy | Tungsten bridge for the low energy ignition of explosive and energetic materials |
AT405591B (de) | 1997-10-03 | 1999-09-27 | Schaffler & Co | Heizelement und verfahren zu dessen herstellung |
US6230624B1 (en) * | 1999-08-13 | 2001-05-15 | Trw Inc. | Igniter having a hot melt ignition droplet |
US20020069780A1 (en) * | 2000-12-07 | 2002-06-13 | Bos Laurence W. | Thin film resistor fabricated on header |
Also Published As
Publication number | Publication date |
---|---|
DE502004005169D1 (de) | 2007-11-22 |
ATE375494T1 (de) | 2007-10-15 |
US20040200371A1 (en) | 2004-10-14 |
US7089861B2 (en) | 2006-08-15 |
ATA1172003A (de) | 2005-04-15 |
EP1443298B1 (de) | 2007-10-10 |
AT413150B (de) | 2005-11-15 |
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