Hongxia Li’s research while affiliated with Henan University of Science and Technology and other places

... The used approach of this work-connecting local interfaces with the overall thermal expansion-is not only pertinent in the development of EMCA-replacing electrofused periclase-spinel refractories, it is also helpful for other refractory composite systems independently if it can be classified as a ceramic-based [71][72][73][74][75][76], ceramic-matrix [77,78] or a metal-matrix [79,80] one. ...

Reference:

Thermal Expansion of Electrofused MgO-Based Spinel Systems Containing Fe2O3, Al2O3-Fe2O3, Al2O3-Cr2O3-Fe2O3 and Al2O3-NiO-Fe2O3

... Ceramic micro/nano fiber aerogel materials offer distinct advantages over conventional solid nanoparticle aerogels [1][2][3]. Specifically, they possess lower density, higher porosity, improved mechanical properties, and greater thermal stability at elevated temperatures [4][5][6][7]. This makes it a promising candidate for advanced thermal insulation applications, particularly in the domains of aerospace and military equipment [8,9]. ...

Reference:

Silicon carbide modified mullite fiber ceramic aerogel with high strength and favourable high-temperature infrared shielding capabilities

... It can be observed that a weak peak of spinel (PDF#82-2424) exists in sample sintered at 1000 • C, which is formed by the reaction of MgO and Al 2 O 3 . 19 The chemical stability of Al 2 O 3 and MgO is lower than that of SiO 2 , and they are prone to spontaneous bonding to form spinel. After sintering at 1100 • C, the reaction between MgO and Al 2 O 3 intensifies, and leads to an increase in content of spinel. ...

Reference:

Thermal/mechanical properties of cordierite synthesized using coal gangue as a refractory material

... According to the dielectric and magnetic parameters of the material, the absorption energy is measured using the reflection loss (RL) (Eqs. (10) and (11)) [58]: ...

Reference:

Entropy-driven microwave absorption enhancement in hexagonal (Ba 1/3 Sr 1/3 Ca 1/3 )FeO 3 perovskite

... Al2O3−C refractories are primarily employed in producing continuous casting components, including slide plates, submerged entry nozzles, long nozzles, and monobloc stoppers [24,25]. ZrO2−C refractories, known for their superior resistance to abrasion and corrosion, are used in hollow ware like continuous casting submerged entry nozzles [26][27][28]. Al2O3−SiC−C refractories are mainly used in torpedoes to transfer liquid iron and steel ladles [29][30][31]. Graphite is the primary carbon source in CCRs because it enhances slag corrosion resistance. ...

Reference:

A Review on the Application of Nanomaterials to Boost the Service Performances of Carbon-Containing Refractories

... Therefore, SiC is expected to play a greater role in the field of magnesium metallurgy. 4 However, under the magnesium metallurgy condition (1200 • C, 10 Pa), SiC ceramics can have a violent interfacial reaction with heat-resistant steel, which considerably shortens the service life of composite retorts. 5,6 Studies indicate that SiC is easy to react with metals in a nonoxidizing environment. ...

Reference:

Synthesis and performance of mullite/Y2Si2O7/ZrO2 coating: Microstructure, phase evolution, and thermal shock behavior

... Notably, the formation of boride-and intermetallic-based secondary phases is thermodynamically inevitable during the synthesis of MAB phases [25]. Intriguingly, these byproducts contribute additional heterogeneous interfaces, thereby enhancing the EMW absorption performance of the material [27]. To quantitatively characterize the crystal structure parameters of the (Fe1−xMnx)2AlB2 samples, Rietveld refinement of the XRD patterns was performed using the GSAS software. ...

Reference:

Joule heating-driven ultrafast synthesis of (Fe 1− x Mn x ) 2 AlB 2 and its electromagnetic wave absorption properties

... Wang et al. [28] compared hot water temperature in 304 steel barrels with and without coating. Experimental results showed that the coated heat radiator's equilibrium temperature dropped by 8°C, the heat transfer coefficient rose by 20%, and thermal resistance decreased by 18%. ...

Reference:

NanoCoating Preparation to Improve Heat Dissipation of a Heat Sink Inside an Enclosure for Power Electronic Devices

... The Al 2 O 3 -ZrO 2 -C composite sintered at 1500°C demonstrated excellent resistance to molten steel corrosion, as Zhao et al. discovered, attributed to the obstruction of ion penetration channels and reduction in permeation rate [8]. Some other reported ZA-based TCCs with exceptional performances encompass ZrO 2 -Al 2 O 3 -A 3 S 2 (3Al 2 O 3 ·2SiO 2 ) [9], ZrO 2 -Al 2 O 3 -SiC [10,11], ZrO 2 -Al 2 O 3 -mullite [12], ZrO 2 -Al 2 O 3 -WC [13]. By summarizing the aforementioned literature finding, it can be inferred that currently, ZA-based TCCs are typically fabricated through sintering densification with a high temperature (> 1450°C) and a prolonged soaking time (several hours). ...

Reference:

A containerless melting-solidification strategy to fabricate ZrO2-Al2O3-SiO2 ternary ceramic composites containing crystalline and amorphous phases

... 4 However, under the magnesium metallurgy condition (1200 • C, 10 Pa), SiC ceramics can have a violent interfacial reaction with heat-resistant steel, which considerably shortens the service life of composite retorts. 5,6 Studies indicate that SiC is easy to react with metals in a nonoxidizing environment. 7,8 Therefore, a viable approach to mitigating this reaction is the application of protective barrier coatings on the SiC composite surface, which can effectively isolate SiC from heat-resistant steel and enhance its stability. ...

Reference:

Synthesis and performance of mullite/Y2Si2O7/ZrO2 coating: Microstructure, phase evolution, and thermal shock behavior