共查询到18条相似文献,搜索用时 109 毫秒
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低温氧化锆氧传感器的研究 总被引:1,自引:0,他引:1
研究了一种新型氧化锆氧传感器-低温氧传感器。它以氧化钇稳定的氧化锆作电池,以二氧化钌(RuO2)代替常规的金属铂(Pt)作电极,即使工作温度降至300℃,它仍有较小的电池内电阻和较快的响应速度,其理想工作温度下限比常规氧化锆氧传感器降低了500℃左右。因此,延长了电池的使用寿命,扩大了该传感器的应用范围。 相似文献
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采用具有自主知识产权的制备工艺流程,制备了氧化锆基NOx气体传感器。首先配制了性能良好的5mol%-ZrO2浆料,流延成型得到了氧化锆陶瓷素坯基片,经过剪裁、冲孔、开槽、丝网印刷等工艺,制备了传感器素坯,经过1450℃2h烧结得到了氧化锆基NOx传感器。应用线性伏安法初步测试了该NOx气体传感器的性能。制备的NOx气体传感器具有良好的NOx气体响应性能。初步性能测试结果表明,传感器的电流值和NO2气体浓度之间存在着强的线性相关性,线性相关系数99.27%,电流值在0.136A~0.142A之间,传感器的线性范围为:200ppm~2000ppm。 相似文献
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王茂兴 《计算机研究与发展》1987,(1)
本文介绍了利用氧化锆传感器测量氧含量的原理及ZOY-2型单片机控制氧化锆氧量分析仪.和日本的ZO21型氧化锆氧量分析仪相比,ZOY-2型增加了两种功能,其它性能也更先进. 相似文献
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提高氧化错氧含量测量系统动态精度的新方法 总被引:1,自引:0,他引:1
本文根据氧化锆氧含量测量传感器的基本原理,针对其动态精度低的特点,提出了提高动态精度的动态预测法,采用该方法可以较精确地得到同一时刻氧化锆传感器输出的氧浓度电势和电热偶输出的热电势。 相似文献
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TiO2薄膜氧敏特性研究 总被引:1,自引:0,他引:1
金属氧化物随氧分压不同,有改变电导率这一性质而被广泛地用来制作氧敏传感器,传统的传感器大多是体材料或厚膜材料,工作时需加高温。本文描述的是TiO2薄膜材料与Pt薄膜形成的肖特基势垒高度随氧分压不同而改变的氧敏现象,测定了该肖特基二极管的氧敏特性,并讨论了它的敏感机理。 相似文献
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本文提出仅用一种标准气或不用标准气标定氧化锆氧量分析仪的新方法。它符合我国的相关检定规程,适宜含氧量下限不小于0.1%的氧量分析仪的首次检定、后续检定和使用中的检验,尤其适宜在发电厂使用了较长时间后,对“检测器的多孔陶瓷过滤网已破损或其气孔被堵塞程度不明”的情况下进行检定或标定。 相似文献
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Jiun-Chan John V. Dale Jules L. Dileep Prabir K. 《Sensors and actuators. B, Chemical》2008,131(2):448-454
Simultaneous measurement of total NOx and O2 using two electrochemical methods are demonstrated using metal/metal oxide internal oxygen reference electrode-based sensors at high temperatures. The Pd/PdO-containing reference chamber was sealed within a stabilized zirconia superstructure by a high pressure/temperature plastic deformation bonding method exploiting grain boundary sliding between the ceramic components. Amperometric and potentiometric NOx sensing devices were assembled on the outside of the sensor. Pt-loaded zeolite Y was used to obtain total NOx capability. Both the amperometric and potentiometric type sensors showed total NOx response, with the potentiometric device showing better NOx/O2 signal stability and lower NOx–O2 cross-interference. Since these sensors do not require plumbing for reference air, there is more flexibility in the placement of such sensors in a combustion stream. 相似文献
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采用固相法制备了LSCM(La0.75Sr0.25Cr0.5Mn0.5O3)粉体。按不同质量比将其与3%-mol氧化钇稳定氧化锆粉体(3YSZ)混合,制备得到系列混合导体。根据热膨张系数、微观形貌等物理特性,选取合适比例的混合导体。采用Pt浆粘合法将其与8YSZ固体电解质叠层制作成致密扩散障型极限电流氧传感器。经测试,使用LSCM质量比分别为60%和70%的混合导体作为致密扩散障时,对应的氧传感器在973 K氧浓度分别为6 000×10-6~2.28%和1.22%~8.01%范围内具有良好的测氧特性,并且极限电流与氧浓度之间存在良好的线性关系;其在不同氧浓度下的响应时间曲线显示传感器重复性好,响应时间约数十秒。 相似文献
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Jing GaoAuthor Vitae Jean-Paul ViricelleAuthor Vitae Christophe PijolatAuthor VitaePhilippe BreuilAuthor Vitae Philippe VernouxAuthor VitaeAntoinette BoreaveAuthor Vitae Anne Giroir-FendlerAuthor Vitae 《Sensors and actuators. B, Chemical》2011,154(2):106-110
In recent years planar yttria-stabilized zirconia (YSZ) based electrochemical gas sensors for automotive exhaust applications have become a major source of interest. The present work aims to develop a sensor for industrialisation. For this reason planar YSZ-based electrochemical sensors using two metallic electrodes (platinum and gold) were fabricated using screen-printing technology and tested in a laboratory test bench for different concentrations of pollutant gas such as CO, NO, NO2 and hydrocarbons in oxygen rich atmosphere. It was furthermore shown that the selectivity towards NOx could be highly reinforced by deposing a catalytic filter consisting of 1.7-4.5 wt.% Pt dispersed on alumina directly on the sensing elements. This filter was characterized by the use of SEM, TPD and XRD. 相似文献
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Measurement of wireless pressure sensors fabricated in high temperature co-fired ceramic MEMS technology 总被引:2,自引:0,他引:2
Ji-jun Xiong Shi-jun Zheng Ying-ping Hong Jun Li Ying-lin Wang Wei Wang Qiu-lin Tan 《浙江大学学报:C卷英文版》2013,14(4):258-263
High temperature co-fired ceramics (HTCCs) have wide applications with stable mechanical properties, but they have not yet been used to fabricate sensors. By introducing the wireless telemetric sensor system and ceramic structure embedding a pressure-deformable cavity, the designed sensors made from HTCC materials (zirconia and 96% alumina) are fabricated, and their capacities for the pressure measurement are tested using a wireless interrogation method. Using the fabricated sensor, a study is conducted to measure the atmospheric pressure in a sealed vessel. The experimental sensitivity of the device is 2 Hz/Pa of zirconia and 1.08 Hz/Pa of alumina below 0.5 MPa with a readout distance of 2.5 cm. The described sensor technology can be applied for monitoring of atmospheric pressure to evaluate important component parameters in harsh environments. 相似文献