Review of High-Temperature Thermal Insulation Materials

Tychanicz-Kwiecień, Maria; Wilk, Joanna; Gil, Paweł

doi:10.2514/1.t5420

Cited by 37 publications

(16 citation statements)

References 45 publications

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“…Traditionally, aerogel is perceived as a superlight material being of extremely low thermal conductivity, which has overwhelming advantages in fields requiring super thermal insulation (Hu et al, 2019;Illera et al, 2018;Tychanicz-Kwiecie n et al, 2019). Contrary to the general aerogel, BN per se is well known for its brilliant thermal conductivity (Sharma et al, 2020).…”

Section: Bn Aerogels With Different Structural Hierarchy Display Similar Thermal Insulationmentioning

confidence: 99%

Reduction of structural hierarchy translates into variable influence on the performance of boron nitride aerogel

Pan

Wang

2021

iScience

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The rise of ceramic aerogel offers traditional ceramics a new window. Alongside the emerging prospects, what is open to explore includes the elegant design of a ceramic aerogel with tailorable inner organizations, what would occur when complex hierarchy exists in such an already intricate system, and how the properties get influenced as the complexity fades. Borrowing the wisdom from supramolecular world, we exquisitely transform BN aerogel from a complex hierarchy to a flatten microstructure based on solvent-induced morphology switch of its supramolecular precursor gel. Such reduction in structural hierarchy has insignificant effect on the thermal conductivity ($0.027 W/(m$K)) but shifts the wettability from hydrophobicity to hydrophilicity and occasions nearly 3-fold difference in ion adsorption rate, as exemplified by lead ions. This work may promote the understanding of special hierarchy existing in delicate systems and inspire other attempts to harness the functionality of aerogels by manipulating structural hierarchy.

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Section: Bn Aerogels With Different Structural Hierarchy Display Similar Thermal Insulationmentioning

confidence: 99%

Reduction of structural hierarchy translates into variable influence on the performance of boron nitride aerogel

Pan

Wang

2021

iScience

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“…Another example of thermal networks which experience a range of thermal conductivity contrast values between their individual phases is porous refractories and ceramics at elevated temperatures. These materials are of interest as high temperature insulation materials for space, aerospace, power generation and high temperature processing applications [35][36][37]. It is assumed that the material contains pores at a porosity fraction, p, and represents a two-phase system, consisting of a refractory ceramic, which can be assumed to have a relatively temperature insensitive thermal conductivity (k ceramic ) and pores, of which the thermal conductivity (k pore ) is sensitive to temperature, due to radiation heat transfer across pore surfaces.…”

Section: Thermal Conduction In Porous Materialsmentioning

confidence: 99%

The Emergent Behaviour of Thermal Networks and Its Impact on the Thermal Conductivity of Heterogeneous Materials and Systems

et al. 2020

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The properties of thermal networks are examined to understand the effective thermal conductivity of heterogeneous two-phase composite materials and systems. At conditions of high contrast in thermal conductivity of the individual phases (k1 and k2), where k1 << k2 or k1 >> k2, the effective thermal conductivity of individual networks of the same composition was seen to be highly sensitive to the distribution of the phases and the presence of percolation paths across the network. However, when the contrast in thermal conductivities of the two phases was modest (k1/k2 ~ 10−2 to 102), the thermal networks were observed to exhibit an emergent response with a low variability in the effective thermal conductivity of mixtures of the same composition. A logarithmic mixing rule is presented to predict the network response in the low variability region. Excellent agreement between the model, mixing rule and experimental data is observed for a range two-phase porous and granular media. The modelling approach provides new insights into the design of multi-phase composites for thermal management applications and the interpretation or prediction of their heat transfer properties.

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“…Złożona budowa wewnętrzna izolacji powoduje, że wymiana ciepła zachodząca w tych materiałach jest również bardzo złożona i występuje głównie na drodze przewodzenia ciepła w składniku stałym izolacji. Może występować również konwekcja i promieniowanie cieplne (szczególnie w wysokich temperaturach [3])oraz dyfuzja wilgoci w przypadku izolacji zawilgoconych.…”

Section: Wprowadzenieunclassified

Projekt I Budowa Stanowiska Do Wyznaczania Współczynnika Przewodzenia Ciepła Otulin Izolacyjnych

Tychanicz-Kwiecień¹,

Markowicz²

2020

ZN PRz Mechanika

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Review of High-Temperature Thermal Insulation Materials

Cited by 37 publications

References 45 publications

Reduction of structural hierarchy translates into variable influence on the performance of boron nitride aerogel

Reduction of structural hierarchy translates into variable influence on the performance of boron nitride aerogel

The Emergent Behaviour of Thermal Networks and Its Impact on the Thermal Conductivity of Heterogeneous Materials and Systems

Projekt I Budowa Stanowiska Do Wyznaczania Współczynnika Przewodzenia Ciepła Otulin Izolacyjnych

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