JPS57166551A - Gas-sensitive and humidity-sensitive element - Google Patents
Gas-sensitive and humidity-sensitive elementInfo
- Publication number
- JPS57166551A JPS57166551A JP56052764A JP5276481A JPS57166551A JP S57166551 A JPS57166551 A JP S57166551A JP 56052764 A JP56052764 A JP 56052764A JP 5276481 A JP5276481 A JP 5276481A JP S57166551 A JPS57166551 A JP S57166551A
- Authority
- JP
- Japan
- Prior art keywords
- sensitive
- humidity
- mgfe2o4
- weighed
- dissolved
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
Abstract
PURPOSE:To detect relative humidity and the concentration of gaseous alcohol with one element, by using magnesium ferrite (MgFe2O4) having spinel structure. CONSTITUTION:As a starting material, an extra pure reagent MgCl2.6H2O and FeCl2.4H2O, are weighed so as to be Mg:Fe=1:1.33-1.3mol ratio and are dissolved to water. Oxalic acid is weighed in 1.5-time equivalent based on Mg+Fe equivalent and is dissolved to water. This solution is injected into said solution and a coprecipitate of oxalate is formed and then, this copecipitate is filtered, washed and dried. Obtained yellow powder is calcined and hereafter, said powder is put in a press metallic mold and is burnt after forming. This sintered body 1 is MgFe2O4 and a gas-sensitive and humidity sensitive element is obtained by attaching a porous electrode 2 and lead wires 3a, 3b on both faces of the body 1. Thus formed element shows variations of >= two digits in resistance value at 0-100% relative humidity and also, responds to gaseous alcohol selectively by keeping at 200-400 deg.C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56052764A JPS57166551A (en) | 1981-04-08 | 1981-04-08 | Gas-sensitive and humidity-sensitive element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56052764A JPS57166551A (en) | 1981-04-08 | 1981-04-08 | Gas-sensitive and humidity-sensitive element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57166551A true JPS57166551A (en) | 1982-10-14 |
Family
ID=12923936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56052764A Pending JPS57166551A (en) | 1981-04-08 | 1981-04-08 | Gas-sensitive and humidity-sensitive element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57166551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150061706A1 (en) * | 2013-08-27 | 2015-03-05 | Council Of Scientific & Industrial Research | Resistive type humidity sensor based on porous magnesium ferrite pellet |
-
1981
- 1981-04-08 JP JP56052764A patent/JPS57166551A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150061706A1 (en) * | 2013-08-27 | 2015-03-05 | Council Of Scientific & Industrial Research | Resistive type humidity sensor based on porous magnesium ferrite pellet |
| US9671359B2 (en) * | 2013-08-27 | 2017-06-06 | Council Of Scientific & Industrial Research | Resistive type humidity sensor based on porous magnesium ferrite pellet |
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