Desenvolvimento e aplicações de biocerâmica

The advancement of the Web of Things animates the improvement of sensors of little size and low power utilization. Scaled down metal-oxide semiconductor (MOX) gas sensors (for example methane, hydrogen or carbon monoxide recognition) can be coordinated into agro-modern offices, for example, animals offices, fish cultivating, ranger service, food-capacity and agriculture, where they support future-arranged plant creation (savvy agribusiness). A micro-hotplate that serves as the central component of a MOX gas sensor is primarily responsible for the power consumption of the sensor at operating temperatures ranging from 450 °C to 600 °C. Ceramic materials are the best choice for the micro-hotplate substrate and sensor housing (ceramic MEMS), as well as platinum metallization for the heater, in harsh environmental conditions. Miniaturized printable heaters mounted on ultrathin ceramic membranes were developed to produce such gas sensors with a low power consumption (200 mW).

Metal-ceramic coatings are widely used in a range of industrial applications due to their ability to provide excellent wear resistance, corrosion protection, and thermal insulation. One of the key factors that affects the performance of metal-ceramic coatings is oxidation. Oxidation can occur within the coating, leading to changes in its microstructure and properties. In this article, we will discuss the mechanisms of oxidation within metal-ceramic coatings and its effects on the coating properties. Oxidation is a chemical reaction that occurs between a metal and oxygen in the presence of heat or a catalyst. In metal-ceramic coatings, the oxidation of the metal component can occur within the coating due to exposure to high temperatures or oxidizing environments. The metal component of the coating typically consists of metals such as chromium, aluminum, or titanium, which have a high affinity for oxygen.