Carbothermal conversion of self‐supporting organic/inorganic interpenetrating networks to porous metal boride monoliths

Li, Fēi; Liu, Jixuan; Huang, Xiao; Bao, Weichao; Zhang, Guojun; Wang, Hongzhi

doi:10.1111/jace.16488

Cited by 9 publications

(4 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… Comparison of the compressive strength and thermal conductivity of the obtained porous HECs with other porous UHTCs from previous reports [ 18 , 30 , 31 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ]. …”

Section: Figurementioning

confidence: 92%

Dual-Porosity (Ta0.2Nb0.2Ti0.2Zr0.2Hf0.2)C High-Entropy Ceramics with High Compressive Strength and Low Thermal Conductivity Prepared by Pressureless Sintering

Yang

Ouyang

et al. 2023

Materials

View full text Add to dashboard Cite

Porous (Ta0.2Nb0.2Ti0.2Zr0.2Hf0.2)C high-entropy ceramics (HEC) with a dual-porosity structure were fabricated by pressureless sintering using a mixture powder of ceramic precursor and SiO2 microspheres. The carbothermal reduction in the ceramic precursor led to the formation of pores with sizes of 0.4–3 μm, while the addition of SiO2 microspheres caused the appearance of pores with sizes of 20–50 μm. The porous HECs exhibit competitive thermal insulation (4.12–1.11 W·m−1 k−1) and extraordinary compressive strength (133.1–41.9 MPa), which can be tailored by the porosity of the ceramics. The excellent properties are ascribed to the high-entropy effects and dual-porosity structures. The severe lattice distortions in the HECs lead to low intrinsic thermal conductivity and high compressive strength. The dual-porosity structure is efficient at phonon scattering and inhabiting crack propagations, which can further improve the thermal insulation and mechanical properties of the porous HECs.

show abstract

Section: Figurementioning

confidence: 92%

Dual-Porosity (Ta0.2Nb0.2Ti0.2Zr0.2Hf0.2)C High-Entropy Ceramics with High Compressive Strength and Low Thermal Conductivity Prepared by Pressureless Sintering

Yang

Ouyang

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…Aerogels prepared by transition metal oxides (e.g. ZrO 2 , TiO 2 , and HfO 2 ) have also been reported, [169][170][171][172][173][174][175] but they have a lower melting point than borides, though this type of aerogels are relative few. By means of epoxy propane crosslinked gel and boron thermal reduction, Worsley et al obtained zirconium boride and hafnium boride aerogels with ultra-high temperature resistance respectively by using different precursor materials (UHTC in Fig.…”

Section: Other Aerogelsmentioning

confidence: 99%

“…9). [168,169] Although the SSA of the aerogels was small, it opens the way for the development of boride aerogels. In conclusion, the combination is another effective way to significantly improve the upper limit of temperature resistance of aerogels.…”

Section: Other Aerogelsmentioning

confidence: 99%

Design, Synthesis, and Use of High Temperature Resistant Aerogels Exceeding 800 oC

Hu¹,

Liu²,

Zhao³

et al. 2021

ES Mater. Manuf.

View full text Add to dashboard Cite

As a type of ultra-light and super thermal insulation solid state porous materials, aerogels have attracted increasing attention for aerospace, transportation, and building insulation applications. However, when aerogels are applied in these fields, resistance to high temperature is a prerequisite for them. The most traditional silica aerogels can resist up to 600 ℃, but their porous structures are destroyed at higher temperatures and no longer possess the excellent thermal insulation capacity and low density. Though a great number of new aerogels have been reported in the past two decades, the number of aerogels that could resist to ultra-high temperature, e.g. >800 ℃, is relative few. Nevertheless, it's exciting to see that more and more aerogels that can resist to temperatures higher than 1000 ℃, and even up to 1500 ℃, have been reported in the past few years. This paper gives an overview of aerogels that could resist to more than 800 ℃, and they defined as high temperature resistant aerogels (HTRAs) in this review. The synthetic strategies, mechanisms, chemical compositions, and specific applications of the HTRAs will be reviewed and discussed. This paper would be a timely review to summarized the most recent progress in the HTRAs, and provide insights into the designing of various HTRAs.

show abstract

“…As reported by Yeh, chromium borides have been synthesized by combustion synthesis involving borothermic and aluminothermic reduction of chromium sesquioxide 9 . Li et al have produced porous metal borides via carbothermal conversion of the organic/inorganic interpenetrating networks 10 . All the above methods need high reaction temperatures.…”

Section: Introductionmentioning

confidence: 99%

Low‐temperature synthesis of CrB nanoparticles and nanosheets by a solid‐state reaction

Wang

Chen

Fang

et al. 2021

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Chromium boride (CrB) has been prepared by using the chromium trioxide (CrO3) and sodium borohydride (NaBH4) as starting materials in a stainless‐steel autoclave. The X‐ray powder diffraction pattern indicates that the as‐prepared product is orthorhombic phase CrB. Scanning electron microscopy shows that the product is composed of nanosheets and nanoparticles. In addition, the oxidation resistance of the as‐prepared CrB product has also been investigated.

show abstract

Carbothermal conversion of self‐supporting organic/inorganic interpenetrating networks to porous metal boride monoliths

Cited by 9 publications

References 63 publications

Dual-Porosity (Ta0.2Nb0.2Ti0.2Zr0.2Hf0.2)C High-Entropy Ceramics with High Compressive Strength and Low Thermal Conductivity Prepared by Pressureless Sintering

Dual-Porosity (Ta0.2Nb0.2Ti0.2Zr0.2Hf0.2)C High-Entropy Ceramics with High Compressive Strength and Low Thermal Conductivity Prepared by Pressureless Sintering

Design, Synthesis, and Use of High Temperature Resistant Aerogels Exceeding 800 oC

Low‐temperature synthesis of CrB nanoparticles and nanosheets by a solid‐state reaction

Contact Info

Product

Resources

About