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    • 5. 发明授权
    • Tin oxide gas sensors
    • 氧化锡气体传感器
    • US5427740A
    • 1995-06-27
    • US129085
    • 1993-10-07
    • Gary S. V. ColesGeraint WilliamsBrian M. Smith
    • Gary S. V. ColesGeraint WilliamsBrian M. Smith
    • G01N27/12G01N33/00
    • G01N27/125G01N27/123Y10T436/20Y10T436/209163Y10T436/22
    • Tin oxide sensors are made by mixing antimony bearing material with tin oxide powder and formation of the sensor by deposition of a slurry of the mixture onto a substrate and drying and sintering the slurry, the antimony bearing material being present in an amount sufficient to render the sensitivity of the sensor to one or more of the gases H.sub.2, CO, or CH.sub.4 , relatively independent of the concentration of oxygen in the range P.sub.O2 10.sup.-1 -1 atm. A further type of a tin oxide gas sensor is disclosed having a resistivity that at a measuring temperature increases with concentration of at least one gas to be measured, the sensor is made by calcining the tin oxide in air at a temperature in excess of 1400.degree. C., or otherwise treating the tin oxide so that it has a state of physical aggregation consistent with being formed in such manner. At a second measuring temperature the resistivity of the sensor to said one gas decreases with increasing gas concentration. The resistivity of the sensor is dependent on the concentration of several gases, the dependence at differing measuring temperatures being such that by measuring the resistivity of the sensor at several different measuring temperatures the composition of a gas to which the sensor is exposed may be calculated. An array of such tin oxide gas sensors may be mounted on a single substrate having heater means to maintain the sensors at differing temperatures. Such an array may also include an antimony bearing sensor as disclosed or other tin oxide sensors.
    • PCT No.PCT / GB92 / 00604 Sec。 371日期:1993年10月7日 102(e)日期1993年10月7日PCT提交1992年4月3日PCT公布。 第WO92 / 17773号公报 日期:1992年10月15日。氧化物传感器通过将锑轴承材料与氧化锡粉末混合并通过将混合物的浆料沉积到基底上并形成干燥和烧结浆料而制成,所述锑轴承材料存在 其量足以使传感器对一种或多种气体H2,CO或CH4的灵敏度相对独立于PO2 10-1-1大气压范围内的氧浓度。 公开了另一种类型的氧化锡气体传感器,其具有在测量温度下随着至少一种待测气体的浓度而增加的电阻率,该传感器是通过在超过1400℃的温度下在空气中煅烧氧化锡制成的。 C.或以其他方式处理氧化锡,使得其具有与以这种方式形成的物理聚集状态。 在第二测量温度下,传感器对所述一种气体的电阻率随着气体浓度的增加而降低。 传感器的电阻率取决于几种气体的浓度,在不同测量温度下的依赖性使得通过在几个不同的测量温度下测量传感器的电阻率,可以计算传感器暴露于其中的气体的组成。 这种氧化锡气体传感器的阵列可以安装在具有加热器装置的单个基板上,以将传感器保持在不同的温度。 这样的阵列还可以包括所公开的锑承载传感器或其它氧化锡传感器。