Comparison of the high-temperature corrosion of aluminium nitride, alumina, magnesia and zirconia ceramics by coal ashes

Mechanical, Corrosion and Biological Properties of Room-Temperature Sputtered Aluminum Nitride Films with Dissimilar Nanostructure

“…In the last years, Aluminum Nitride (AlN) became a hot topic material for many sensing applications. This is due to its good piezoelectric properties, large bandgap (6.2 eV), high temperature stability (up to 1000 °C), chemical inertness, compatibility with the process technology, that makes AlN a very interesting material for realization of various types of sensors [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. For instance, piezoelectric AlN thin films were successfully integrated in pressure sensors capable to operate in high temperature or in harsh environments conditions (e.g., combustion pressure sensors for cars) [ 8 ] or for measuring pressure fluctuations in rotating machinery such as compressors and turbines [ 9 ].…”

Bio-Slag High-Temperature Corrosion on an Alumina Refractory under the Reducing Environment

“…26 Guanjun Zhang and Mathias Hermann have studied the coal and biomass slag infiltration into the alumina refractory by simulating co-gasification. 27,28 However, the mechanism of the interaction between ash-forming elements and the refractory material is still unclear. Moreover, the corrosion behavior from bio-slag would be different from that of coal slag, and there is a lack of investigations on bio-slag corrosion behaviors on the refractory under gasification conditions.…”

“…It is reported that abundant alkaline and alkali earth metals in biomass could promote the ash slagging in the biomass/coal blends. ,, In addition, the blending of biomass may indicate significant synergy for various combustion/gasification properties and result in different ash-related problems. , An increase in coal ash content increases the slag production and lead to a decrease in gasification efficiency . Guanjun Zhang and Mathias Hermann have studied the coal and biomass slag infiltration into the alumina refractory by simulating co-gasification. , However, the mechanism of the interaction between ash-forming elements and the refractory material is still unclear. Moreover, the corrosion behavior from bio-slag would be different from that of coal slag, and there is a lack of investigations on bio-slag corrosion behaviors on the refractory under gasification conditions.…”

High Temperature Spectrally Selective Solar Absorbers Using Plasmonic AuAl2:AlN Nanoparticle Composites

“…However, to our knowledge there have been no studies conducted on Au nanoparticles embedded in an AlN matrix. Compared to Al 2 O 3 and MgO, AlN exhibits enhanced resistance to spallation and mechanical damage, due to its lower thermal expansion coefficient . The exceedingly refractive nature of this dielectric – AlN melts at ∼2600 °C – combined with the corrosion resistance of Au, seemed to offer an attractive pathway toward the development of improved solar thermal absorbers for use at temperatures up to 550 °C.…”

“…Compared to Al 2 O 3 and MgO, AlN exhibits enhanced resistance to spallation and mechanical damage, due to its lower thermal expansion coefficient. [26] The exceedingly refractive nature of this dielectric -AlN melts at $2600 C [26] combined with the corrosion resistance of Au, seemed to offer an attractive pathway toward the development of improved solar thermal absorbers for use at temperatures up to 550 C. Only about 260 mg of Au would be required per square meter in the coatings to be described below. Economic benefits accruing from having a higher performing coating will outweigh the cost of the Au content (about US$10/m 2 of surface at a gold price of $40 per/g).…”