JPS61108963U

JPS61108963U -

Info

Publication number: JPS61108963U
Application number: JP19431384U
Authority: JP
Priority date: 1984-12-21
Filing date: 1984-12-21
Publication date: 1986-07-10

Description

[Brief explanation of drawings]

第１図は本考案の限界電流式酸素濃度検出器の
素子の二実施例の断面図、第２図は第１図の素子
を製造する際のセラミツク棒にセラミツクグリー
ンシートを巻き付ける工程を示す斜視図、第３図
は第２図の工程で製造したセラミツクヒータに更
にシート状の固体電解質を巻き付ける工程を示す
斜視図、第４図は本考案の検出器の別の実施例の
ヒラミツクヒータの部分破断平面図、第５図は従
来の限界電流式酸素濃度検出器の素子の一例を示
す断面図、第６図は素子温６００°Ｃにおける本
考案と従来の限界電流式酸素濃度検出器の印加電
圧と出力電流との関係を示すグラフ、第７図は同
じく素子温６００°Ｃにおける本考案と従来の検
出器の酸素濃度と出力電流との関係を示すグラフ
、第８図は本考案と従来の検出器のヒータ通電開
始後の経過時間と素子温との関係を示すグラフで
ある。１，１′……セラミツク棒、２，１２……金属
発熱体、３……セラミツクグリーンシート、４，
４′，４″……セラミツクヒータ、５，５′……
固体電解質、６……陽電極、７……陰電極、８，
８′……ホルダー、９……リード線、１０……拡
散律速層、１１，１３……素子、１４……隙間。 Figure 1 is a cross-sectional view of two embodiments of the element of the limiting current type oxygen concentration detector of the present invention, and Figure 2 is a perspective view showing the process of wrapping a ceramic green sheet around a ceramic rod when manufacturing the element of Figure 1. 3 is a perspective view showing the step of further wrapping a sheet-like solid electrolyte around the ceramic heater manufactured in the step of FIG. 2, and FIG. 4 is a partially broken view of the ceramic heater of another embodiment of the detector of the present invention. A plan view, FIG. 5 is a sectional view showing an example of the element of a conventional limiting current type oxygen concentration detector, and FIG. 6 shows the applied voltage of the present invention and the conventional limiting current type oxygen concentration detector at an element temperature of 600°C. Figure 7 is a graph showing the relationship between the oxygen concentration and output current of the present invention and the conventional detector at an element temperature of 600°C. Figure 8 is the graph showing the relationship between the present invention and the conventional detector. It is a graph showing the relationship between the elapsed time after the start of energization of the heater of the detector and the element temperature. 1, 1'... Ceramic rod, 2, 12... Metal heating element, 3... Ceramic green sheet, 4,
4', 4''... Ceramic heater, 5, 5'...
solid electrolyte, 6... positive electrode, 7... negative electrode, 8,
8'...Holder, 9...Lead wire, 10...Diffusion controlling layer, 11, 13...Element, 14...Gap.

Claims

[Scope of utility model registration request]

A sheet-like oxygen ion-permeable solid electrolyte having a positive electrode formed on the inner surface and a negative electrode formed on the outer surface is coated on a rod-shaped ceramic heater with at least a porous surface, and is further coated on the negative electrode. A limiting current type oxygen concentration detector characterized by being equipped with an oxygen concentration detection element in which a diffusion-limiting layer is formed.