2021
DOI: 10.1002/er.6976
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Low‐temperature and pressureless in‐situ self‐assembled SiC w / SiC composite ceramics for solar thermal absorber and storage integration

Abstract: Summary Compared with current research of simply improving the efficiency of thermal absorber or thermal storage, integrating two devices into one fundamentally avoids the heat transfer loss between the two devices. In‐situ self‐assembled SiCw(SiC whisker)/SiC composite ceramics for integrated thermal absorber and thermal storage were pressurelessly prepared from graded SiC, AlN, and Si powders by layered powder embedded sintering in a low temperature range from 1450°C to 1650°C. After sintered at 1550°C, samp… Show more

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Cited by 9 publications
(8 citation statements)
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“…Closed pores merge and open pores increase, so the apparent porosity increases and the bending strength decreases. The sample B4 at 1510 • C has the best comprehensive physical properties, with Wa of .12%, AP of .39%, D of 3.27 g/cm 3 , and σ b of 89.41 MPa. With the addition of TiO 2 , magnesium aluminate spinel can be synthesized at a lower temperature and obtain a higher density.…”
Section: Physical Propertiesmentioning
confidence: 99%
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“…Closed pores merge and open pores increase, so the apparent porosity increases and the bending strength decreases. The sample B4 at 1510 • C has the best comprehensive physical properties, with Wa of .12%, AP of .39%, D of 3.27 g/cm 3 , and σ b of 89.41 MPa. With the addition of TiO 2 , magnesium aluminate spinel can be synthesized at a lower temperature and obtain a higher density.…”
Section: Physical Propertiesmentioning
confidence: 99%
“…According to Equation ( 5), the value of heat storage density from room temperature to 1000 • C can be calculated. 3 The heat storage density is 0-1218.75 kJ/kg (from room temperature to 1000 • C).…”
Section: Thermal Physical Propertiesmentioning
confidence: 99%
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“…Therefore, thermal storage ceramics have become the research hotspot on thermal storage materials in the field of solar thermal power generation. Nowadays, there are plenty of researchers have prepared thermal storage ceramics with different crystalline phases, such as mullite, 3 cordierite, 4 anorthite, 5 silicon carbide 6 . With reference to these ideas, this work intends to prepare MgAl 2 O 4 thermal storage ceramics with different magnesium sources, on which there are few researches before.…”
Section: Introductionmentioning
confidence: 99%
“…However, in analyzing the in-situ growth of SiC w on C/C composite material surfaces, many researchers have merely employed traditional V-L-S (vapor-liquid-solid) mechanisms to expound upon the process, disregarding the presence of numerous dislocations and defects on the C/C surface, which can serve as active growth sites [13][14][15][16]. This factor lowers the energy required for SiC w growth, allowing whiskers to also grow via the V-S (vapor-solid) mechanism [17,18]. This paper primarily investigates the mechanism of in-situ growth of SiC w on the surface of C/C composite materials.…”
Section: Introductionmentioning
confidence: 99%