Fabrication and properties of fibrous porous mullite–zirconia fiber networks with a quasi-layered structure

Zhang, Rubing; Hou, Xianbo; Ye, Changshou; Wang, Baolin; Fang, Daining

doi:10.1016/j.jeurceramsoc.2016.06.003

Cited by 36 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that PI aerogel composites possessed almost equivalent modulus compared with inorganic oxide aerogel composites and fibrous ceramics at lower densities 26–28 . Besides, as shown in Figure 4(e), the as‐prepared PI aerogel composites possessed higher specific compressive strength and lower thermal conductivity than varieties aerogels and porous ceramics, such as SiC aerogel, 29 carbon aerogel, 30 SiO 2 nanofiber aerogel, 31 and inorganic oxide fibrous ceramics 32–35 . However, the pure PI aerogels prepared in this work had no dominant advantages, which strongly proved that whisker reinforcement played a decisive role in improving the compressive properties of composites.…”

Section: Resultsmentioning

confidence: 71%

“…[26][27][28] Besides, as shown in Figure 4(e), the as-prepared PI aerogel composites possessed higher specific compressive strength and lower thermal conductivity than varieties aerogels and porous ceramics, such as SiC aerogel, 29 carbon aerogel, 30 SiO 2 nanofiber aerogel, 31 and inorganic oxide fibrous ceramics. [32][33][34][35] However, the pure PI aerogels prepared in this work had no dominant advantages, which strongly proved that whisker reinforcement played a decisive role in improving the compressive properties of composites. Furthermore, PI aerogel composites showed good deformation ability in the compression process while inorganic aerogels and porous ceramics exhibited inherent frangibility.…”

Section: Mechanical and Heat-insulation Propertiesmentioning

confidence: 77%

See 1 more Smart Citation

SiC whiskers‐reinforced polyimide aerogel composites with robust compressive properties and efficient thermal insulation performance

Hou

Li²,

Luo

et al. 2020

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Polyimide (PI) aerogels enable promising application in many fields but are always inhibited by their weak resistance to high temperature and low mechanical properties. Herein, novel PI aerogel composites with efficient heat insulation and high compressive performance are prepared by introducing Silicon carbide whiskers (SiCw) as reinforcement. The SiCw in aerogel function as shrinkage inhibitor and high temperature stabilizer. The addition of SiCw exhibits obvious enhancement and toughening effect, the compressive strength of the PI aerogel composites increases from 1.09 to 1.96 MPa. These PI aerogel composites also show enhanced high temperature stability. The as-prepared PI aerogel composites possess integrated properties of high-temperature resistance, low thermal conductivity, and high compressive strength, which can be the candidate for the application in aerospace.

show abstract

Section: Resultsmentioning

confidence: 71%

Section: Mechanical and Heat-insulation Propertiesmentioning

confidence: 77%

SiC whiskers‐reinforced polyimide aerogel composites with robust compressive properties and efficient thermal insulation performance

Hou

Li²,

Luo

et al. 2020

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…One of the promising methods for making porous ceramics is the application of ceramic fibres as raw material, which has been demonstrated in numerous papers [ 14 , 15 , 16 ]. Most of these articles reported the formation of a three-dimensional network of interconnected pores [ 4 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Fibrous Alumina and Zirconia Toughened Alumina Ceramics with Gradient Porosity

et al. 2022

View full text Add to dashboard Cite

This paper investigated a synthesis process for highly porous Al2O3, Y-ZTA, and Ce-ZTA ceramic nanocomposites with gradient microstructure and improved mechanical properties. Ceramic nanofibres were synthesized as the starting material. The gradient microstructure was developed during spark plasma sintering using an asymmetric graphite arrangement that generated significant temperature differences (80–100 °C) between the opposite sides of the samples. Structural and mechanical properties of the fibrous ceramic composites were investigated. The effect of the temperature gradient on properties was also discussed. While the asymmetric configuration resulted in a gradient porosity, reference samples fabricated in standard graphite configuration were uniformly porous. The gradient structure and the ZrO2 addition led to improved hardness and compression strength of the sintered samples. However, the opposite sides of the samples exhibited considerable variations in both microstructure and in terms of properties. The upper part of the Ce-ZTA ceramic showed a highly porous structure with 18.2 GPa hardness, while the opposite side was highly densified with 23.0 GPa hardness. Compressive strength was 46.1 MPa and 52.1 MPa for Y-ZTA and Ce-ZTA sintered at 1300 °C, respectively, despite their high porosity. The research provided a promising approach to prepare highly porous ZTA composites with high strength for a wide range of applications.

show abstract

“…The weak connection between nanoparticles and nanosheets is the fundamental reason for their fragility. Although increasing the density can significantly increase the compressive strength of an aerogel, the aerogel still shows obvious brittleness. ,− Due to the lack of flexibility, in previous studies, inorganic aerogels can only be immersed into porous materials (such as porous ceramics, fibrous ceramics, and fiber felts) as reinforcements and heat insulation materials in practical applications. , In order to achieve high flexibility of inorganic aerogels, it is necessary to introduce structural design into the preparation of an aerogel to improve the deformation ability. For example, Liʼs group used directional freeze-drying to develop ultralightweight, compressible, and springback graphene aerogels by constructing a deformable microstructure. , Further, they used the prepared graphene aerogel as a template to prepare ultraelastic and ultrahigh-temperature-resistant ceramic aerogels .…”

Section: Introductionmentioning

confidence: 99%

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

Hou,

Chen,

Chen

et al. 2024

ACS Nano

Self Cite

View full text Add to dashboard Cite

The design and preparation of flexible aerogel materials with high deformability and versatility have become an emerging research topic in the aerogel fields, as the brittle nature of traditional aerogels severely affects their safety and reliability in use. Herein, we review the preparation methods and properties of flexible aerogels and summarize the various controlling and design methods of aerogels to overcome the fragility caused by high porosity and nanoporous network structure. The mechanical flexibility of aerogels can be revolutionarily improved by monomer regulation, nanofiber assembly, structural design and controlling, and constructing of aerogel composites, which can greatly broaden the multifunctionality and practical application prospects. The design and construction criterion of aerogel flexibility is summarized: constructing a flexible and deformable microstructure in an aerogel matrix. Besides, the derived multifunctional applications in the fields of flexible thermal insulation (flexible thermal protection at extreme temperatures), flexible wearable electronics (flexible sensors, flexible electrodes, electromagnetic shielding, and wave absorption), and environmental protection (oil/water separation and air filtration) are summarized. Furthermore, the future development prospects and challenges of flexible aerogel materials are also summarized. This review will provide a comprehensive research basis and guidance for the structural design, fabrication methods, and potential applications of flexible aerogels.

show abstract

Fabrication and properties of fibrous porous mullite–zirconia fiber networks with a quasi-layered structure

Cited by 36 publications

References 19 publications

SiC whiskers‐reinforced polyimide aerogel composites with robust compressive properties and efficient thermal insulation performance

SiC whiskers‐reinforced polyimide aerogel composites with robust compressive properties and efficient thermal insulation performance

Preparation and Characterization of Fibrous Alumina and Zirconia Toughened Alumina Ceramics with Gradient Porosity

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

Contact Info

Product

Resources

About