Ceramic Sensors
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Production of Ba2AlNbO6 Ceramics and Study of their Stability in Crude Petroleum for the Conservation of Metallic Sensing Elements Used in Petroleum Extraction
In the present work niobium based complex cubic perovskite oxide Ba2AlNbO6 ceramics were produced, characterized and their stability in crude petroleum environment was studied for inert ceramic embedding used in petroleum extraction. Ba2AlNbO6 ceramic powder was prepared by means of thermo-mechanical processing. Structural characteristics of calcined materia
Mat. Res.. Publicado em: 26/07/2018
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2. Kinetic and Thermodynamic Study in Pozzolanic Chemical Systems as an Alternative for Chapelle Test
Important properties in cementitious materials, such as concrete, are related to the presence of additives that influence the rigidity and the physical and chemical resistances. For the evaluation of the additive effectiveness, known as pozzolanic activity, a simple procedure, the Chapelle test, is commonly used, and it essentially consists in a reaction bet
Mat. Res.. Publicado em: 25/06/2018
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3. Mechanical, Magnetic, and Microstructural Characterization of Ni0.9Co0.1Fe2O4 Produced by the Ceramic Method
Ni-Co ferrites, especially the ones with lower cobalt fractions, are candidate materials for applications in magnetomechanical sensors and electromagnetic wave absorbers. This work studied the microstructure, magnetostriction, flexural strength, and complex magnetic permeability of Ni0.9Co0.1Fe2O4, presenting data that weren't covered by previous literature
Mat. Res.. Publicado em: 22/02/2018
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4. Experimental Investigation of Ionization Sensors under Shock Tube Stagnation Conditions
ABSTRACT: Recently, there has been a growing interest in studies concerning ionization sensors for aerospace applications, power generation, and fundamental research. In aerospace research, they have been used for studies of shock and detonation waves. Two key features of these sensors are their short response time, of the order of microseconds, and the fact
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
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5. Construção de sensores eletroquímicos utilizando como matriz materiais cerâmicos SI O IND. 2 / M IND. X O IND. Y , e materiais cerâmicos eletricamento condutores SI O IND. 2 / C/ M IND. X O IND. Y , preparados pelo processo sol-gel / Construction of electrochemical sensors using ceramic materials SI O IND. 2 / M IND. X O IND. Y and electrically conducting ceramic materials SI O IND. 2 /C/ M IND. X O IND. Y as matrix, prepared for the sol-gel process
This work describes the synthesis and characterization of three different materials: SiO2/SnO2, SiO2/SnO2/Sb2O5 and the film of Nb2O5 formed on the surface of the ceramic material SiO2/C obtained by sol-gel process and to use them as matrix in the development of electrochemical sensors. The mixed oxides, SiO2/SnO2, were synthesized using as source of SnO2, S
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/04/2012
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6. Estudo de cerâmicas porosas de titânia e zircônia mono e multicamadas para aplicação como sensores de umidade do ar / Study under ceramic porous of titania and zirconia in mono and multilayer configurations to use as air humidity sensor
A demanda crescente no monitoramento de parâmetros ambientais, fez com que os dispositivos chamados sensores participassem de intensos processos de pesquisa e de desenvolvimento tecnológico. A necessidade de uma melhor compreensão do comportamento de sensores cerâmicos porosos em relação à sensitividade à umidade ambiente motivou o desenvolvimento de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2011
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7. Preparação, caracterização e estudos eletroquimicos de eletrodos a base de carbono cerâmico aplicados na determinação de dopamina
O estudo de eletrodos a base de carbono cerâmico (ECC), tem aumentado significativamente devido às vantagens sobre os demais eletrodos. Os ECC apresentam grande área superficial, alta condutividade elétrica, além de uma maior resistência mecânica, o que aumenta a estabilidade e durabilidade desses eletrodos. Os diferentes parâmetros utilizados na pre
Publicado em: 2010
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8. Propriedades estruturais, microestruturais e elétricas da cerâmica BaSnO3 / Structural properties, the microstructural and electrical ceramics BaSnO3
The surface properties of ceramic powders play an important role in the production of devices of high quality, high performance and reliability. Many of these properties are related to interactions with the environment. One example, ceramics are used in gas sensor devices. A ceramic material that has been reported as promising gas sensor is perovskite BaSnO3
Publicado em: 2009
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9. Material carbono ceramico condutor SiO2/ZrO2/C-grafite : sintese, caracterização e aplicações / SiO2/ZrO2/C-graphite conducting carbon ceramic material : synthesi characterization and application
SiO2/ZrO2/C-graphite was prepared by the sol-gel method in two compositions: (A) SZC30 (SiO2 = 50 %, ZrO2 = 20 %, C = 30 %) e (B) SZC20 (SiO2 = 60 %, ZrO2 = 20 %, C = 20 %) in % m/m, characterized and used to prepare electrodes. The carbon ceramic material was thermally treated at 400, 600, 800 and 1000 °C in nitrogen atmosphere, and it was observed that it
Publicado em: 2008
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10. Compósitos cerâmicos porosos de alumina - zircônia para aplicação em sistemas de controle térmico para satélites: obtenção e caracterização / Alumina-zirconia porous ceramic composites for application in satellite thermal control systems: obtaining and characterization
To control the temperature of satellites are used various thermal control heat systems. The Loop Heat pipe (LHP) are being developed at the DEM (Space Mechanic and Control Division) of the INPE (National Institute for Space Research) an apparatus for passive heat control of the satellites components. The main components of the LHP system are: capillary evapo
Publicado em: 2008
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11. Desenvolvimento do sensor baseado em eletrólito sólido de β-alumina para monitoramento de enxofre na indústria siderúrgica / DEVELOPMENT OF CERAMIC SOLID ELECTROLYTE SENSOR BASED ON β-ALUMINA FOR SULPHUR MONITORING IN STEELMAKING INDUSTRY
Electrochemical sensors provide real time information of chemical compositions of molten metal. They can be used to improve the control of various metallurgical processes. One of the most successful and widely used electrochemical sensors is the oxygen sensor, based on zircônia solid electrolyte, usually used in steel making. Sensors are being developed for
Publicado em: 2007
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12. Electrochemical behavior of Ti/Al2O3 interfaces produced by diffusion bonding
In the field of biomedical applications a special interest exists regarding the study of the physicochemical and mechanical behaviour of materials, with special focus on the electrochemical degradation of metal/ceramic interfaces. In fact, metal/ceramic interfaces may be present in several biomedical devices, ranging from external or implantable sensors, to
Materials Research. Publicado em: 2003-12