gas sensing properties of metal - organics derived pt dispersed - tio2 thin film fired in nh3

. 270–274 www.elsevier.nlrlocatersensorb Gas sensing properties of metal- organics derived Pt dispersed- TiO thin 2 film fired in NH 3 I. Hayakawa a,) , Y. Iwamoto a,1 , K. Kikuta b , S. Hirano b a Fine Ceramics Research. resistance of the thin film fired in different atmosphere measured at 2008C Number Firing atmosphere Kind of thin film Kind of measuring gas Relative resistance 1a NH TiO Pt a...

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. image of an MWCNTs-doped SnO 2 sol (c); FE-SEM image of an MWCNTs-doped SnO 2 (d). Please cite this article in press as: N. Van Hieu, et al., Gas- sensing properties of tin oxide doped with metal. temperature of the PtO 2 -doped SnO 2 sensors with varying PtO 2 doping content. Please cite this article in press as: N. Van Hieu, et al., Gas- sensing properties of tin oxide doped with metal oxides...

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. certain control and monitoring. 3.3. Gas- sensing properties In this study, we ®rst examined the eect of calcining temperature on gas- sensing properties of sensor. It was found that the calcining. h in air. Thickness of the sen- sitive bodies after sintering was approximately 0.6±0.8 mm. 2.4. Measurement of sensing properties The gas- sensing properties were examined in a chamber through. El...

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. ammonia gas sensors preparation. In the present work, we investigate ammonia gas sensing prop- erties of nanocrystalline tungsten oxide with and withoutplatinum doping under different processing. achieveimprovements in the gas sensing properties such as enhancing their response, selectiv- ity to a given target species and reduce the operating temperature, small amounts of noble metals (Pt, Pd...

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. nanocrystalline-doped tin oxide sensor at lower operat- ing temperatures, Sens. Actuators B 104 (2005) 223–231. [11] A. Salehi, M. Gholizade, Gas- sensing properties of indium-doped SnO 2 thin films. changes the sensing properties of the WO 3 -based sensors. 4. Conclusions The gas sensing properties of pure and indium-doped nanoparticle WO 3 thick films were studied. Sensors were prepared using c...

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. SEM images of the sensing films deposited by screen printing. The sensing film exhibited the typical microstruc- ture of screen printed sensing films. A porous sensing film surface was obtained due. surface area of the sensing film is decreased with increase of grain size [1]. So, the grain growth of the sensing film induces low sensitivity of the sensor. On the other hand, ther- mally stable,. reser...

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. the thickness of the gas- sensing layer was too thin. The response and recovery time of the sensor in the present study were all measured at the optimizing thickness of gas- sensing layer, about. sensors having an inter- electrode gap of 0.1 mm only were studied. The graphic measuring principle is shown in Fig. 2. Measurements of gas- sensing prop- erties were carried out using a system. to N...

Ngày tải lên: 20/03/2014, 13:06

. purpose of this study is to find thermal treatment con- ditions that can optimize gas- sensing performance in a tungsten oxide nanorod system. In addition, thermal treatment-dependent gas- sensing characteristics. TiO 2 [17,18]. In this work, we prepared tungsten oxide films by drop-coating single-crystalline, size-controlled WO 2.72 nanorod solution, and then investigated the dependence of thei...

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. by the gas sensing reaction. In contrast, a hollow morphology with a thin shell configuration and large pore volume facilitates the in- diffusion of the sensing gas and counter-diffusion of the. and operating temperatures on the gas- sensing properties of rf sputtered WO 3 thin- film sensors, Sens. Actuators B 105 (2005) 271–277. [18] G. Xie, J. Yu, X. Chen, Y. Jiang, Gas sensing characteristi...

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. to explain the growth of the double-sided nanorod arrays. Moreover, the gas sensing performance of the as-synthesised Co-doped WO 3 nanos- tructures was investigated towards a series of flammable. nanometers. Fig. S-1 shows the FE-SEM image of commercial WO 3 powders (Supplementary data). Given amounts of test gases were injected into the testing chamber by a microsyringe. Gas sens- ing measurem...

Ngày tải lên: 20/03/2014, 13:04