- Author
-
Handa, T.
|
Fukaya, H.
|
Kojima, K.
|
Endo, K.
|
Okayama, Y.
- Title
- Current-Voltage Characteristics of Pt-Sn02 Point-Contact.
- Coporate
- Science University, Tokyo, Japan
Nohmi Bosai Co., Ltd., Japan
- Book or Conf
- Society of Materials Science, Japan. Japan Congress on Materals Research, 23rd. 1980,
220-224 p.,
1980
- Keywords
-
electric potential
|
gas detectors
|
carbon monoxide
- Identifiers
- preparation of wafer; preparation of point-contact cell device; I-V Characteristics of the device in test gas-air mixtures; contact between Pt-electrode and wafer; current response of the device to the square pulse application; I-V characteristics
- Abstract
- Seiyama et al, developed ZnO type ceramic gas detector in 1962. Since then, many study have been made so far on the ceramic gas detectors. However, it is no exaggeration to say that technology in this field is not yet established, because of the difficulty in the response of the sinterred bulky device during the long time exposure in the actual environment as well as the uniform response of the products. Almost all of gas sensors commercially available for the detecting appliance are equipped with various kinds of heater panel in ordinary service for excluding the effect from the moisture and other environmental gases and also for endowing a quick response time to the sensor. However, the single most difficulty in the use of the present sensors for fire detector is in that they can not preferentially detect CO gas or other products specific to smoldering fire sources. The present authors explored the possibility for developing a device which can exclude the effect of moisture and others gases in the environmental atmospheres without any heating panel and which can also detect preferentially CO and other polar gases specific to smoldering fire. This paper treats with the details of the point-contact cell device employing Pt-electrode and sinterred Sn02 wafer, and their Current(I)-Voltage(V) characteristics.