NiCrAlY coating was prepared on a stainless steel substrate by an arc ion plating machine and the annealing experiments were carried out at different temperatures using a tube furnace. The effects of annealing temperatures on the morphology, structure, chemical composition and phase structure of the coating were characterized by SEM, EDS and XRD, respectively. The change of microstructure is di...

Graphite furnace techniques are characterized by excellent analytical sensitivity. They are methods of choice for the determination of trace elements in various environmental, biological, and clinical samples. However, they can be plagued by chemical and background interferences which complicate methods development and sample analysis. Using the graphite platform technique, these interferences ...

In this work, the experiment was conducted to investigate the effect of temperature and sub-bituminous coal on upgrading nickel laterites ores by carbothermic reduction. The reduction was carried out in the muffle furnace at a temperature ranging of 800-1100 o C. The produced calcine from reduction step was grounded in vibrating mill, mixed with water and passed on a magnetic separator to separ...

Abstract—The performance of mortar subjected to high temperature and cooled in normal ambient temperature was examined in the laboratory to comply with the situation of burning & cooling of a structure. Four series of cubical (5 X 5 X 5 cm) mortar specimens were made from OPC, and partial replacement (10, 15, 20, 25 & 30%) of OPC by Rice Husk Ash (RHA) produced in the uncontrolled environment. ...

It is a high efficiency，energy-saving and emission reduction measure to replace coal with biomass briquette fuel in layer combustion furnace, but the process, serious slagging problem has been restricted promotion of fuel. By analyzing characteristics briquette, ash fusion mechanism, combined important influence key parameters (furnace temperature, excess air, thickness) on furnace obtained, wh...

Chemicals and thermal treatments Two types of commercial anatase TiO2 with a specific surface area of 300 m2 g-1 and 95 m2 g-1were used as-received from Sachtleben Chemie (Duisburg, Germany). Annealing was carried out in a horizontal furnace equipped with a quartz tube reactor. Typically, the TiO2 powder sample (1 g) was heated in a quartz boat at a temperature gradient of 10 oC min-1 till reac...

Continuous ultrasonic in-situ monitoring for industrial applications is difficult owing to 11 the high operating temperatures in industrial fields. It is expected that ultrasonic transducers 12 consisting of CaBi4Ti4O15(CBT)/Pb(Zr,Ti)O3(PZT) sol-gel composite could be one solution for 13 ultrasonic nondestructive testing (NDT) above 500 °C because no couplant is required and CBT has 14 a high C...

The use of renewable wood-based fuel has been increasing in the last few decades because it is said to be carbon neutral. However, wood-based fuel, and especially used wood (also known as recycled wood or waste wood), is more corrosive than virgin wood (forest fuel), because of higher amounts of chlorine and heavy metals. These elements increase the corrosion problems at the furnace walls where...

Low grade diasporic bauxite in the Jajarm mine with an A/S (Al2O3/SiO2) ratio of 2.3 is not usable in the Bayer process at Jajarm Alumina Complex. Due to the severe interlocking effect between the diaspore and aluminosilicate minerals (Chamosite and Kaolinite) and iron-containing minerals in a microcrystal matrix, the thermo-chemical treatment, which is independent from micro-mineralogy, was ch...