JPS63194305A - Humidity sensitive ceramics - Google Patents
Humidity sensitive ceramicsInfo
- Publication number
- JPS63194305A JPS63194305A JP62027589A JP2758987A JPS63194305A JP S63194305 A JPS63194305 A JP S63194305A JP 62027589 A JP62027589 A JP 62027589A JP 2758987 A JP2758987 A JP 2758987A JP S63194305 A JPS63194305 A JP S63194305A
- Authority
- JP
- Japan
- Prior art keywords
- humidity
- moisture
- sensitive ceramics
- humidity sensitive
- sensitive ceramic
- 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
- 239000000919 ceramic Substances 0.000 title claims description 14
- 229910052768 actinide Inorganic materials 0.000 claims description 3
- 150000001255 actinides Chemical class 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910017509 Nd2 O3 Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- -1 and B. aCO3 Chemical compound 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(III) oxide Inorganic materials O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 description 1
- VQCBHWLJZDBHOS-UHFFFAOYSA-N erbium(III) oxide Inorganic materials O=[Er]O[Er]=O VQCBHWLJZDBHOS-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 102220007331 rs111033633 Human genes 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Non-Adjustable Resistors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、感湿セラミックに関し、特に、電子レンジ
、オーブン、食器乾燥機などの食品調理器をはじめ各種
機器の湿度センサとして広く用いることができる感湿セ
ラミックに関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to humidity-sensitive ceramics, and in particular can be widely used as humidity sensors for various appliances including food cookers such as microwave ovens, ovens, and dish dryers. Regarding moisture-sensitive ceramics.
（従来の技術）
従来、このような用途に用いられる感湿セラミックとし
ては、ＭｇＣｒ２０４−ＴｉＯ２、ＺｎＯ−Ｃｒ２０３
−Ｌ ｉ２０、ｖ２０５−ＴｉＯ２などがあり、これら
の多くは湿度センサの材料として使用されている。たと
えば、特公昭５６−６１２１号公報には、加熱クリーニ
ングが容易にでき、かつ安定な特性を示す感湿セラミッ
クが開示されている。(Prior Art) Conventionally, moisture-sensitive ceramics used for such applications include MgCr204-TiO2 and ZnO-Cr203.
-L i20, v205-TiO2, etc., and many of these are used as materials for humidity sensors. For example, Japanese Patent Publication No. 56-6121 discloses a moisture-sensitive ceramic that can be easily heated and cleaned and exhibits stable characteristics.
（発明が解決しようとする問題点）
しかしながら、これら従来の感湿セラミックは、１５０
℃以上の高温域において感湿特性が低下したり、また、
低下しなくてもその特性が要求を満足でなかったりする
ため、たとえば、高温域で絶対湿度を検知することが要
求きれる電子レンジなどでは、その要求を満たすことが
できなかった。(Problems to be Solved by the Invention) However, these conventional moisture-sensitive ceramics have a
Moisture sensitivity may deteriorate in high temperature ranges above ℃, and
Even if the humidity does not deteriorate, the characteristics may not meet the requirements, and therefore, for example, in microwave ovens, which are required to detect absolute humidity in a high temperature range, this requirement cannot be met.
したがって、この発明は、室温から高温域まで感度の良
好な感湿セラミックを提供するものである。Therefore, the present invention provides a moisture-sensitive ceramic having good sensitivity from room temperature to high temperature range.
（問題点を解決するための手段）
この発明は、次の一般式、
八Ｒ１，Ｉ（’Ｘ（１≦ｘ≦０．３０）からなる主成分
に、Ｒ２（１５からなる添加物を１０．０モル％以下含
有させた感湿セラミックである。(Means for Solving the Problems) This invention consists of adding an additive consisting of R2 (15) to a main component consisting of the following general formula, 8R1,I ('X (1≦x≦0.30)) It is a moisture-sensitive ceramic containing .0 mol% or less.
ただし、八はＣａ、Ｓｒ、Ｂａのうち少なくとも１種Ｂ
はＣｅＳ７．ｒのうち少なくとも１種Ｂ°はアクチナイ
ドを除＜ ＩＩＩ ａ族およびＩｎのうち少なくとも１
種
Ｈは５価の金属うち少なくとも１種
この発明の感湿セラミックは、上記した組成を構成する
各種材料を調合し、調合原料を混合して仮焼し、この仮
焼粉末にバインダを加えたのち成形し、さらに成形体を
焼成することにより得られる。そして、得られた焼結体
の表面にポーラスな電極を付与することにより湿度セン
サが得・られることになる。However, 8 is at least one B among Ca, Sr, and Ba.
is CeS7. At least one of r B° is excluding actinide <III At least one of group a and In
Species H is at least one pentavalent metal.The moisture-sensitive ceramic of the present invention is obtained by blending various materials constituting the above-mentioned composition, mixing and calcining the raw materials, and adding a binder to the calcined powder. It is obtained by later molding and then firing the molded body. A humidity sensor is then obtained by applying a porous electrode to the surface of the obtained sintered body.
（発明の効果）
この発明の感湿セラミックによれば、信頼性が高く、し
かも１５０℃以上の高温域でも、絶対湿度の検知ができ
る湿度センサを提供することができ、また検温感度の経
時変化が小ざく、ざらには高温側から低湿側への応答が
速いという効果を有する。(Effects of the Invention) According to the humidity-sensitive ceramic of the present invention, it is possible to provide a humidity sensor that is highly reliable and can detect absolute humidity even in a high temperature range of 150°C or higher, and also changes over time in temperature detection sensitivity. The effect is that the response from the high temperature side to the low humidity side is quick.
（実施例）
以下に、この発明にかかる感湿セラミックについて詳細
に説明する。(Example) Below, the moisture-sensitive ceramic according to the present invention will be described in detail.
原ねとして、主成分となるＣａＣＯ３、ＳｒＣＯ３、Ｂ
ａＣＯ３、ＣｅＯ２、ＺｒＯ２、Ｌａ２【】３、Ｎｄ２
Ｏ３、Ｙ２Ｏ３、Ｅｒ２Ｏ３、Ｄｙ２Ｏ３、Ｐｒ２Ｏ３
、うに秤量した。これらの秤量物をボールミルで湿式混
合した。次に、これを脱水、乾燥し、１２００℃で２時
間仮焼した。そして、この仮焼物を粉砕し、酢酸ビニル
系樹脂を１０重蛋χ加えて混合し、得られた造粒粉末を
約２ｔｏｎ／ｃｍ”の圧力で直径１０ｍｍ、厚み０．５
ｍｍの円板に成形した。この成形円板を空気中で１３５
０℃の温度で２時間焼成した。得られた直径８．ＯＯｎ
ｍ、厚み０．４５ｍｍの焼結体の両表面に直径７．００
ｍｍの白金のポーラス電極を付与して湿度センサとした
。As raw materials, the main components are CaCO3, SrCO3, and B.
aCO3, CeO2, ZrO2, La2[]3, Nd2
O3, Y2O3, Er2O3, Dy2O3, Pr2O3
, the sea urchin was weighed. These weighed materials were wet mixed in a ball mill. Next, this was dehydrated, dried, and calcined at 1200° C. for 2 hours. Then, this calcined product is crushed, vinyl acetate resin is added and mixed, and the resulting granulated powder is pulverized to a diameter of 10 mm and a thickness of 0.5 mm under a pressure of approximately 2 tons/cm.
It was molded into a disk of mm. This molded disk was placed in the air for 135 minutes.
It was baked for 2 hours at a temperature of 0°C. Obtained diameter8. OOn
m, diameter 7.00 mm on both surfaces of a sintered body with a thickness of 0.45 mm.
A humidity sensor was made by attaching a platinum porous electrode with a thickness of 1 mm.
このようにして得た湿度センサを用いて、水蒸気を１０
４１０４ｐｐ重量比表示）含む４５０℃の雰囲気中の抵
抗値（Ｒ）１１）、および水蒸気を１０１０５ＰＰ含む
４５０℃の雰囲気中の抵抗値（ＲＨ２）を、それぞれ測
定した。Using the humidity sensor obtained in this way, water vapor can be detected by
The resistance value (R) 11) in an atmosphere at 450°C containing 4104pp (expressed by weight ratio) and the resistance value (RH2) in an atmosphere at 450°C containing 10105pp water vapor were measured.
ざらに、これらの値を次式に代入して、湿度感度Ｓを算
出した。Roughly, these values were substituted into the following equation to calculate the humidity sensitivity S.
Ｒ１１＝ＲＨ２・（Ｈ１／Ｉ（２）−”’１ ”０４Ｐ
ｐｍｖ、 Ｒ２： １０５ｐｐ＋ｏｗこのようにして
、第１表に示したような結果を得た。R11=RH2・(H1/I(2)−”'1 ”04P
pmv, R2: 105 pp+ow In this way, the results shown in Table 1 were obtained.
なお、第１表中＊印を付した試料はこの発明範囲外のも
のであり、それ以外はこの発明範囲内のものである。Note that the samples marked with * in Table 1 are outside the scope of this invention, and the others are within the scope of this invention.
（以下、余白）
第 １ 表
第１表から明らかなように、この発明の感湿セラミック
について、その組成中のＸが０．３を越えると湿度感度
が低下する（試料番号５、試料番号１３）。また、添加
物のＨＯが１０．０モル％を越えると同様に湿度感度が
低下する（試料番号９、試料番号１３、試料番号１４、
試料番号１９）。(Hereinafter, blank space) Table 1 As is clear from Table 1, the humidity sensitivity of the humidity-sensitive ceramic of the present invention decreases when X in the composition exceeds 0.3 (Sample No. 5, Sample No. 13). ). Furthermore, when the HO content of the additive exceeds 10.0 mol%, the humidity sensitivity similarly decreases (sample number 9, sample number 13, sample number 14,
Sample number 19).
なお、この発明の感湿セラミックは、第１表以外のアク
チノイドを除＜ ＩＩＩ ａ族の元素、たとえば、Ｐ＊
、Ｅｕ、Ｇｄ、Ｔｂ、Ｈｏ、Ｔｍ、Ｙｂ、１．ｕを用い
てもよい。The moisture-sensitive ceramic of the present invention does not contain any actinides other than those in Table 1.
, Eu, Gd, Tb, Ho, Tm, Yb, 1. u may also be used.
また、製法については、シート成形方式や、ペーストに
よる厚膜方式など、ｈ記した実施例の方法とは異なる他
の方法を用いてもよい。Further, as for the manufacturing method, other methods different from the method of the embodiment described in h, such as a sheet molding method or a thick film method using paste, may be used.
Claims (1)
０）からなる主成分に、Ｍ＿２Ｏ＿５からなる添加物を
１０．０モル％以下含有させた感湿セラミック。 ただし、ＡはＣａ、Ｓｒ、Ｂａのうち少なくとも１種Ｂ
はＣｅ、Ｚｒのうち少なくとも１種 Ｂ′はアクチナイドを除くIIIａ族およ びＩｎのうち少なくとも１種 Ｍは５価の金属のうち少なくとも１種[Claims] The following general formula, AB_1_−_xB'_xO_3 (0.0≦x≦0.3
Moisture-sensitive ceramic containing 10.0 mol% or less of an additive consisting of M_2O_5 in the main component consisting of 0). However, A is at least one of Ca, Sr, and Ba.
is at least one of Ce and Zr B' is at least one of IIIa group excluding actinides and In M is at least one of pentavalent metals
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62027589A JPS63194305A (en) | 1987-02-09 | 1987-02-09 | Humidity sensitive ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62027589A JPS63194305A (en) | 1987-02-09 | 1987-02-09 | Humidity sensitive ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63194305A true JPS63194305A (en) | 1988-08-11 |
Family
ID=12225137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62027589A Pending JPS63194305A (en) | 1987-02-09 | 1987-02-09 | Humidity sensitive ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63194305A (en) |
-
1987
- 1987-02-09 JP JP62027589A patent/JPS63194305A/en active Pending
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