aluminum-doped tio2 nano-powders for gas sensors

... Sensors and Actuators B 124 (2007) 111–117 Aluminum-doped TiO 2 nano-powders for gas sensors Young Jin Choi a , Zachary Seeley a , Amit Bandyopadhyay a , Susmita ... TiO 2 gas sensors were more selective and sensitive to CO and O 2 at an operating temperature of 600 ◦ C than pure TiO 2 powders. © 2007 Published by Elsevier B.V. Keywords: Ceramic gas sensors; Gas ... prese...

Ngày tải lên: 19/03/2014, 16:47

... gas sensors owing to their sensitive conductivity changes upon gas reaction and adsorption. SnO 2 and ZnO have been the most widely used materials for gas sensing applications. Recently, gas ... applications. Recently, gas sensing performances of TiO 2 have also attracted great interest and many efforts have been devoted for developing titania based gas sensors. TiO 2...

Ngày tải lên: 19/03/2014, 16:47

... devices such as gas sensors, are in a crystalline form [6]. Tungsten also forms other oxides such as WO, W 2 O 3 , and W 4 O 3 , however, in gas sensing the stable WO 3 form is used. As for MoO 3 , ... decade. They show promising gas sensing properties as well as unique optical properties for various applications. However, as in most cases, practical and high performance MOS based...

Ngày tải lên: 19/03/2014, 16:47

... candidate of gas- sensing applications [15–17]. For the gas- sensing materials, there are various approaches using CNTs as the solution such as CNTs for dispersion, CNTs for composite, CNTs for filling, ... implementation, and small size [1,2]. Gas sensors based on SnO 2 materials have been commercially available [3,4]. Thin- film gas sensors have improved the gas- sensing pr...

Ngày tải lên: 20/03/2014, 13:04

... structures for semiconductor gas sensors (NEWGAS) Pekka Kuivalainen 1 and Vilho Lantto 2 . Abstract The aim of the present research project is to develop new advanced gas sensors ... catalyst such as Pt. A new gas measurement system has been built at HUT, which includes gas sources for over ten different gases and a new scanning Kelvin probe to measure...

Ngày tải lên: 20/03/2014, 13:05

... sensitivity for ethanol. Successful utilization of CNTs in gas sensors may open a new window for the development of novel nanostructure gas devices. © 2008 Elsevier B.V. All rights reserved. 1. ... interest is the gas adsorption property that allows CNTs to be made as new gas materials, depending on their large surface area [6–8] and hollow geometry. Several models that account...

Ngày tải lên: 20/03/2014, 13:06

... widely used materials for thin film-based conductometric gas sensors. The mechanistic steps responsible for the gas- induced conductance changes of polycrystalline metal-oxide sensors have been investigated. ... reliable sensors for control and measuring systems, for automation of services and microelectronics with an excellent performance, reli- ability and low price. For t...

Ngày tải lên: 20/03/2014, 13:11

... nickel alloys. See page 29 for choosing the right gas. pencil torch swivel head torch pencil torch swivel head torch torch body ceramic nozzle gas lens tungsten electrode gas gas uniform laminar gas flow WwW.oto-hui.com 15 TIG ... RIGHT GAS Gases for MIG/MAG welding Notes: In many applications Argon-2% oxygen is preferred for the welding of steels containing 5% Cr. Always seek...

Ngày tải lên: 25/02/2014, 10:20

... is raised above the limit of decomposition for the oxide (from 600 ◦ C for zinc oxide to 1500 ◦ C for indium oxide) [16]. A controlled flow of inert gas (usually argon) is maintained during decomposition ... obtained for an operating temperature of 400 ◦ C for both the samples. 5. Optical characterization Photoluminescence (PL) spectroscopy was performed over a wide temperature and...

Ngày tải lên: 16/03/2014, 15:25

... noble-metals in the chemistry of solid-state gas sensors, Sens. Actuators B 1 (1990) 158-162. [23] P. P. Sahay, Zinc oxide thin film gas sensor for detection of acetone, J. Mater. Sci. 40 (2005) ... 5000 0.0 50.0u 100.0u 150.0u 200.0u Gas out 4000 ppm 2000 ppm 1000 ppm I (A) Time (Sec) 500 ppm Temperature=350 o C Gas in Figure 6 Accepted Manuscript Title: AlInN resistive ammonia...

Ngày tải lên: 19/03/2014, 16:47