The Effect of Operating Modes on the Response of Ammonia Sensors Based on Tin Dioxide Films

2020 ◽  
Vol 46 (5) ◽  
pp. 480-483
Author(s):  
A. V. Tsymbalov ◽  
V. M. Kalygina ◽  
N. K. Maksimova ◽  
E. V. Chernikov
Author(s):  
А.В. Цымбалов ◽  
В.М. Калыгина ◽  
Н.К. Максимова ◽  
Е.В. Черников

The effect of temperature modulation on the response of ammonia sensors based on tin dioxide films was studied. Samples were obtained by RF-magnetron sputtering of a SnO2: Sb target on sapphire substrates with pre-deposited Pt-electrodes and a heater. Varying the duration of the heating cycle and lowering the temperature in the cooling cycle can increase the response by one to two orders of magnitude. The results are explained by a change in the density of chemically adsorbed oxygen on the surface of the SnO2: Sb film depending on the temperature mode.


Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 983 ◽  
Author(s):  
Sandrine Bernardini ◽  
Florent Pourcin ◽  
Nassirou Nambiema ◽  
Olivier Margeat ◽  
Khalifa Aguir ◽  
...  

Ammonia detection at low temperatures below 150 °C is attractive to be well suited for flexible substrates in terms of thermal strain and to specific environment not allowing high temperature such as explosive one. In commercial gas sensors, tungsten trioxide is the mostly used semiconducting metal oxide after tin dioxide. We report herein the efficiency of tungsten trioxide nanowires deposited on rigid substrate by drop coating from colloidal solution. This study provides an interesting approach to fabricate ammonia sensors on conformable substrate with significant properties for applications in environmental monitoring devices.


This article describes the proposed approaches to creating distributed models that can, with given accuracy under given restrictions, replace classical physical models for construction objects. The ability to implement the proposed approaches is a consequence of the cyber-physical integration of building systems. The principles of forming the data structure of designed objects and distributed models, which make it possible to uniquely identify the elements and increase the level of detail of such a model, are presented. The data structure diagram of distributed modeling includes, among other things, the level of formation and transmission of signals about physical processes inside cyber-physical building systems. An enlarged algorithm for creating the structure of the distributed model which describes the process of developing a data structure, formalizing requirements for the parameters of a design object and its operating modes (including normal operating conditions and extreme conditions, including natural disasters) and selecting objects for a complete group that provides distributed modeling is presented. The article formulates the main approaches to the implementation of an important practical application of the cyber-physical integration of building systems - the possibility of forming distributed physical models of designed construction objects and the directions of further research are outlined.


Author(s):  
Petar Kazakov ◽  
Atanas Iliev ◽  
Emil Marinov

Over the decades, more attention has been paid to emissions from the means of transport and the use of different fuels and combustion fuels for the operation of internal combustion engines than on fuel consumption. This, in turn, enables research into products that are said to reduce fuel consumption. The report summarizes four studies of fuel-related innovation products. The studies covered by this report are conducted with diesel fuel and usually contain diesel fuel and three additives for it. Manufacturers of additives are based on already existing studies showing a 10-30% reduction in fuel consumption. Comparative experimental studies related to the use of commercially available diesel fuel with and without the use of additives have been performed in laboratory conditions. The studies were carried out on a stationary diesel engine СМД-17КН equipped with brake КИ1368В. Repeated results were recorded, but they did not confirm the significant positive effect of additives on specific fuel consumption. In some cases, the factors affecting errors in this type of research on the effectiveness of fuel additives for commercial purposes are considered. The reasons for the positive effects of such use of additives in certain engine operating modes are also clarified.


2006 ◽  
Vol 65 (8) ◽  
pp. 719-730 ◽  
Author(s):  
M. V. Mil'cho ◽  
B. P. Yefimov ◽  
V. V. Zavertanniy ◽  
V. V. Goncharov
Keyword(s):  

Vestnik MEI ◽  
2017 ◽  
pp. 8-14 ◽  
Author(s):  
Aleksandr V. Gudenko ◽  
◽  
Viktor К. Dragunov ◽  
Andrey Р. Sliva ◽  
◽  
...  

2020 ◽  
Vol 2 ◽  
pp. 28-31
Author(s):  
A.N. Ivanov ◽  
◽  
P.V. Pyatibratov ◽  
A.R. Aubakirov ◽  
A.D. Dziublo ◽  
...  

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