CN1165797A - Gas sensitive alumina-based material and gas sensitive component - Google Patents
Gas sensitive alumina-based material and gas sensitive component Download PDFInfo
- Publication number
- CN1165797A CN1165797A CN 96117563 CN96117563A CN1165797A CN 1165797 A CN1165797 A CN 1165797A CN 96117563 CN96117563 CN 96117563 CN 96117563 A CN96117563 A CN 96117563A CN 1165797 A CN1165797 A CN 1165797A
- Authority
- CN
- China
- Prior art keywords
- gas
- gas sensitive
- sensitive
- ceramic
- gas sensor
- 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
Abstract
A Al2O3-base gas-senstive ceramic material is prepared from active Al2O3 as basic material with 45-95% of molecualr ratio, B2O3 as flux (less than 10%), the additives including SnO2, In2O3, Y2O3, Co2O3, Sb2O3, ZrO2, MoO3, ZnO, K2O, Nb2O5, MgO and SiO2, the catalyst CPdCl2 or Pt) and binder through coating-sintering technology. The indirectly heated gas-sensitive elements respectively sensitive to hydrogen, alcohol, methane, butane and CO are also made up, and features high selectivity, stability, and temp and humidity resistances, and long service life.
Description
The invention belongs to a kind of ceramic gas sensitive and gas sensor
That the at present application of pottery gas sensor is maximum is SnO
2System's (J77-005880 patent) and ZnO system (J54-032394 patent), SnO
2System adopts SnO
2Make matrix material, add SiO
2, PdCl
2Be catalyst, ZnO system adopts ZnO to make matrix material, adds ZnSO
4Deng.Use the defective of this class pottery gas sensor existence of above matrix material and making to be:
1. poor stability.The resistance value of pottery gas sensor is subjected to the impact of environment temperature and humidity very big.During long-term the use, the resistance value of element in air or in the imflammable gas descends, and is lower than the wrong report that arranges under the concentration thereby cause.In addition, element can not be stablized in a short time, and its resistance needs could surely get off through a series of variations, and this variation generally needs the time of dozens of minutes even several days.The element stability difference has caused the difficulty of detection by quantitative to a great extent.
2. gas is differentiated rate variance.This class component presents certain gas universality to inflammable gas, is difficult to reach the pure gas selectivity.
3. the life-span is short.After the element long term operation, cause the sensitive material grain growth, carry out uncompleted reaction between the solid phase, factors such as the catalyst performance change of adding in the element descend element function, thereby component life is shortened.Element is long-term place after, catalyzer can or adsorb other gas because of suction poison, active decline, therefore body material also can change performance, so that element can not use and scrap.
Purpose of the present invention is exactly in order to overcome the defective of prior art, to have proposed a kind of good stability, having good temperature resistance, anti humility performance, to gas resolving power height, has good pure gas selectivity, ceramic gas sensitive and gas sensor that the life-span is long.
Purpose of the present invention can reach by following measures.Cooperate ceramic gas sensitive of composition and gas sensor with ceramic matrix material and additive by certain molecule per-cent.The present invention active A l
2O
3Be matrix material (its molecule percentage is 45%-95%), interpolation can improve gas-selectively, have and flux or the additive of catalytic action, such as transition metal oxide (2%-50%), metal oxide (1%-15%), nonmetal oxide (0-10%) selects at least two kinds to cooperate with matrix material and noble metal (1%-2.5%) is made catalyst and through realizing the present invention after certain littleization and the activation process.
Compared with the prior art the present invention has the following advantages:
1. broken through generally Al in ceramic gas sensitive and element of prior art
2O
3Do additive limitation and with it as matrix material, and strengthen its activity by littleization and activation process, thereby developed Al
2O
3The new function of material.
2. given full play to Al
2O
3The characteristics of material.Use Al
2O
3The element of base gas sensitive and preparation is subjected to the impact of environment temperature, humidity hardly, and element resistance value also has good stability.Continuously measured is 80 days in the stability periods test, and the static resistance fluctuation of resistance is lower than 5%, less than 8% of prior art.
3. gas resolution height.G=R
1/ R
2〉=9 (R
1, R
2Be the resistance value of identity element when two kinds of gas with various, the same concentrations).G 〉=3 that are higher than prior art.
4. by littleization processing, material is reacted completely in sintering process between solid phase, avoided the change of element material property in the life-time service process, thereby make element that the long life-span be arranged material.
Below the present invention is described in detail.
Purpose of the present invention can also realize by following measure.The matrix material of ceramic gas sensitive of the present invention and gas sensor is Al
2O
3(45%-95%), be added with flux B
2O
3(0-10%), the gas sensitive according to test gas with various needs can add respectively transition metal oxide SnO
2(5%-30%), In
2O
3(20%-50%), Y
2O
3(5%-20%), Co
2O
3(1%-4%), Sb
2O
3(2%-4%), ZnO (0.1%-9.5%), MoO
3(0.5%-5%), ZrO
2(trace-5%), alkali metal oxide K
2O (trace-1%), alkaline earth oxide MgO (2%-15%), nonmetal oxide SiO
2(2%-9%), wherein one or more add precious metals pd Cl
2(0.2%-2.5%) or Pt powder (0.1%-2%) as catalyst.Add suitable amount of adhesive, adopt coating-sintering process, can be made into ceramic gas sensitive and heater-type sintered-type gas sensor thereof.Embodiment one Al
2O
3Base hydrogen sensitive material and element prescription: Al
2O
3(55%-80%), B
2O
3(2%-6%), SnO
2(10.5%-25%), SiO
2(4%-9%), Sb
2O
3(2.5%-4%), PdCl
2(0.5%-2%).Performance: air acceptance of the bid setting examination scope sensitivity response time gas is distinguished rate 0.1-1 (V) 10-10000 (ppm) 〉=3≤10 (S) 〉=9 embodiment two Al
2O
3Base hexanol sensitive material and element prescription: Al
2O
3(50%-75%), B
2O
3(1%-3%), SnO
2(10%-25%), MgO (2%-12%), SiO
2(2%-6%), Co
2O
3(1%-4%), MoO
3(2%-5%), PdCl
2(0.2%-1%).Performance: air acceptance of the bid setting examination scope sensitivity response time gas is distinguished rate 0.1-0.6 (V) 5-500 (ppm) 〉=5≤10 (S) 〉=9 embodiment three Al
2O
3Methylmethane sensitive material and element prescription: Al
2O
3(45%-70%), In
2O
3(25%-50%), ZnO (1%-4%), K
2O (trace-1%), Pt (0.2%-2%).Performance: detectable level: 0.5% (vol), sensitivity: 6.5.Embodiment four Al
2O
3The quick base sense material of butane and element prescription: Al
2O
3(45%-70%), In
2O
3(20%-45%), Y
2O
3(5%-20%), ZrO
2(0.1%-3%), Pt (0.1%-1%).Performance: detectable level: 0.5% (vol), sensitivity: 10.Embodiment five Al
2O
3Based carbon monoxide sensitive material and element prescription: Al
2O
3(50%-75%), ZnO (5%-20%), MgO (1%-10%), Co
2O
3(1%-4%), PdCl
2(0.2%-1%), ZrO
2(2%-5%), Nb
2O
5(2%-5%).Performance: detectable level: 0.5% (vol), sensitivity: 6.5.
Claims (7)
1. a ceramic gas sensitive and gas sensor are made up of ceramic base material and additive formula.It is characterized in that base material is active A l
2O
3(45%-95%), additive has transition metal oxide (＜50%), other metal oxide (＜15%) and nonmetal oxide (＜10%), selects at least two kinds, and noble metal (＜2.5%) is made the catalyst composition.
2. ceramic gas sensitive as claimed in claim 1 and gas sensor is characterized in that being added with flux B
2O
3(0-10%), additive SnO
2(5%-30%), In
2O
3(20%-50%), Y
2O
3(5%-20%), Co
2O
3(1%-4%), Sb
2O
3(2%-4%), ZnO (0.1%-9.5%), MoO
3(0.5%-5%), ZrO
2(trace-5%), K
2O (trace-1%), MgO (2%-15%), SiO
2(2%-9%), Nb
2O
5(trace-5%), wherein one or more; Catalyst P dCl
2(0.2%-5%) or Pt (0.1%-2%) form.
3. such as ceramic gas sensitive and the gas sensor of claim 1～2, it is characterized in that by Al
2O
3(55%-80%), add B
2O
3(2%-6%), SnO
2(10.5%-25%), SiO
2(4%-9%), Sb
2O
3(2.5%-4%), PdCl
2(0.5%-2%) form.
4. such as ceramic gas sensitive and the gas sensor of claim 1～2, it is characterized in that by Al
2O
3(50%-75%), add B
2O
3(1%-3%), SnO
2(10%-25%), MgO (2%-12%), SiO
2(2%-6%), Co
2O
3(1%-4%), MoO
3(2%-5%), PdCl
2(0.2%-1%) form.
5. such as ceramic gas sensitive and the gas sensor of claim 1～2, it is characterized in that by Al
2O
3(45%-70%), add In
2O
3(25%-50%), ZnO (1%-4%), K
2O (trace-1%), Pt (0.2%-2%) forms.
6. such as ceramic gas sensitive and the gas sensor of claim 1～2, it is characterized in that by Al
2O
3(45%-70%), add Y
2O
3(5%-20%), ZrO
2(0.1%-3%), In
2O
3(20%-45%), Pt (0.1%-1%) forms.
7. such as ceramic gas sensitive and the gas sensor of claim 1～2, it is characterized in that by Al
2O
3(50%-75%), add ZnO or SnO
2(5%-20%), MgO (1%-10%), ZrO
2(2%-5%), Co
2O
3(1%-4%), Nb
2O
5(2%-5%), PdCl
2(0.2%-1%) form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117563A CN1072622C (en) | 1996-05-22 | 1996-05-22 | Gas sensitive alumina-based material and gas sensitive component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117563A CN1072622C (en) | 1996-05-22 | 1996-05-22 | Gas sensitive alumina-based material and gas sensitive component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1165797A true CN1165797A (en) | 1997-11-26 |
| CN1072622C CN1072622C (en) | 2001-10-10 |
Family
ID=5124403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96117563A Expired - Fee Related CN1072622C (en) | 1996-05-22 | 1996-05-22 | Gas sensitive alumina-based material and gas sensitive component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072622C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329338C (en) * | 2005-05-19 | 2007-08-01 | 北京化工大学 | Gas-sensing material with noble metal doped composite metal oxide and its production |
| CN107337473A (en) * | 2017-07-25 | 2017-11-10 | 济南大学 | The growth in situ MoO on earthenware3The method and gas sensor of nanometer sheet |
| CN108709913A (en) * | 2018-05-22 | 2018-10-26 | 广东美的制冷设备有限公司 | Gas sensor sensitive material and preparation method thereof |
| CN108760832A (en) * | 2018-05-22 | 2018-11-06 | 芜湖美智空调设备有限公司 | Gas sensor sensitive material and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175380B (en) * | 2011-03-01 | 2012-08-08 | 上海大学 | Method for measuring pressure of gas film of gas bearing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2339960A1 (en) * | 1972-08-07 | 1974-03-07 | Beckman Instruments Inc | GAS DETECTOR |
| JPS5847665B2 (en) * | 1975-05-14 | 1983-10-24 | 株式会社東芝 | gas sensing element |
| JPS5432394A (en) * | 1977-08-17 | 1979-03-09 | Toshiba Corp | Gas sensitive element |
-
1996
- 1996-05-22 CN CN96117563A patent/CN1072622C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329338C (en) * | 2005-05-19 | 2007-08-01 | 北京化工大学 | Gas-sensing material with noble metal doped composite metal oxide and its production |
| CN107337473A (en) * | 2017-07-25 | 2017-11-10 | 济南大学 | The growth in situ MoO on earthenware3The method and gas sensor of nanometer sheet |
| CN107337473B (en) * | 2017-07-25 | 2020-07-07 | 济南大学 | In-situ growth of MoO on ceramic tubes3Nanosheet method and gas sensor |
| CN108709913A (en) * | 2018-05-22 | 2018-10-26 | 广东美的制冷设备有限公司 | Gas sensor sensitive material and preparation method thereof |
| CN108760832A (en) * | 2018-05-22 | 2018-11-06 | 芜湖美智空调设备有限公司 | Gas sensor sensitive material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1072622C (en) | 2001-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yamaura et al. | Highly selective CO sensor using indium oxide doubly promoted by cobalt oxide and gold | |
| US6124224A (en) | High temperature sealing glass | |
| CN100592082C (en) | Formaldehyde air-sensitive material and its preparation method and preparation method for formaldehyde air-sensitive device | |
| CN102692437A (en) | Gas sensitive material, carbon monoxide gas sensitive element adopting gas sensitive material and preparation method of carbon monoxide gas sensitive element | |
| EP0579639B1 (en) | Tin oxide gas sensors | |
| CN1072622C (en) | Gas sensitive alumina-based material and gas sensitive component | |
| CN100406880C (en) | Formaldehyde gas sensitive device with laminated sensitive layer and preparation method thereof | |
| CA1056956A (en) | Gas sensing element | |
| CN103257161B (en) | Embedded NASICON-based H2 sensor with compound metal oxide as passivation reference electrode and manufacturing method of embedded NASICON-based H2 sensor | |
| US4209378A (en) | Oxygen sensing element | |
| Yasunaga et al. | Effects of tetraethyl orthosilicate binder on the characteristics of an SnO2 ceramic-type semiconductor gas sensor | |
| US5698267A (en) | Method for fabricating high-activity electrodes for exhaust gas sensors | |
| CN109342521B (en) | In doped with alkaline earth metal2O3Formaldehyde sensitive material and application thereof in formaldehyde detection | |
| JPH05505465A (en) | gas sensor | |
| US4209377A (en) | Oxygen sensing element | |
| CN111157601A (en) | Based on K2Fe4O7Room-temperature high-humidity hydrogen sulfide gas sensor of electrolyte, preparation method and application thereof | |
| US5589046A (en) | Room temperature carbon monoxide gas sensor and the process for preparing the same | |
| JP3171734B2 (en) | Carbon monoxide gas sensing element | |
| JP2000283941A (en) | Metal oxide material for semiconductor sensor, and carbon monoxide sensor using the material | |
| KR20000073701A (en) | Gas sensor materials modified with perovskite compounds and its preparation | |
| CN113376310A (en) | Preparation method of gas-sensitive material for combustible gas sensor and product | |
| JPH02269947A (en) | Sensor for combustion control | |
| KR100383534B1 (en) | Fabrication Method on Porous Protective Layer of Gas Sensor | |
| JPS60253859A (en) | Gas sensor | |
| CA2066273C (en) | Solid-state oxygen sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |