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A novel design of a solar absorber making use of different optical properties of materials for high temperature solar-thermal applications is proposed. For the two sides of the sample, the solar absorbing surface is designed to absorb sunlight and reduce radiative heat loss, while the high emission surface is aimed at enhancing the heat transfer. The composite samples were prepared by tape casting,...
MgAl2O4–Si3N4 ceramics were fabricated via pressureless sintering by using α-Si3N4, α-Al2O3 and MgO as starting materials. MgAl2O4 was in-situ synthesized in the composite ceramics to improve the sintering process and high-temperature performance of Si3N4. Results show that the composite with approximately 30wt% MgAl2O4 sintered at 1620°C exhibits the best physical properties, excellent thermal shock...
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