What material has the worst thermal conductivity?
Answers from top 9 papers
More filters
Papers (9) | Insight |
---|---|
17 Citations | At high temperatures, our results are at variance with some literature that indicate a ‘strongly’ decreasing thermal conductivity or an essentially ‘temperature independent’ thermal conductivity. |
14 Citations | A material that has a good thermal conductivity, low cost, but also resistance is the desired. |
We show that this is the principal factor for the very low thermal conductivity. | |
23 Jul 2019 41 Citations | The results proved that the thermal conductivity can be improved substantially by... |
30 Citations | The results indicate that the effective thermal conductivity distribution greatly depends on Kapitza thermal resistance, particle size, and degree of material gradient. |
12 Citations | The measurements show that both purity and thermal treatment strongly influence the value of thermal conductivity. |
21 Citations | This plot allows researchers to quickly distinguish materials where the thermal conductivity has been optimized from those where improvement can be made. |
36 Citations | An explicit dependence of contact conductance on temperature was not seen to be necessary as long as the changes in the hardness and thermal conductivity of the material with temperature are incorporated in the correlation. |
The predictions of an effective thermal conductivity agree with the experimental data. |
Related Questions
What factors affect the thermal conductivity of different materials?4 answersFactors that affect the thermal conductivity of different materials include moisture content, temperature difference, bulk density, airflow velocity, thickness, pressure, and material aging. The length of the crystal lattice is a primary factor that influences the thermal conductivity of graphene, while the edge termination state has little effect. Temperature and moisture content are relevant factors that can cause variability in thermal conductivity, with inorganic fibers showing a linear temperature dependence and foamed insulation materials exhibiting nonlinear behavior. The presence of a graphite coating on a sample and the thickness of the sample can also affect the measurements of thermal conductivity, with deviations ranging from 5.5% to 60% depending on the material's thermal conductivity coefficient and the thickness of the coating.
What are the factors that affect the thermal conductivity of a material?5 answersFactors that affect the thermal conductivity of a material include moisture content, temperature difference, bulk density, airflow velocity, thickness, pressure, and material aging. The thermal conductivity of materials can also vary depending on their composition, such as inorganic fibers like rockwool or fiberglass showing lower thermal conductivities at lower temperatures, and foamed insulation materials like polyisocyanurate exhibiting nonlinear temperature dependence. Additionally, the thermal conductivity of a material can be influenced by factors such as the specific gravity, viscosity of fluid, porosity, and particle size. Understanding these factors is crucial for selecting and designing thermal insulation materials for building envelopes and achieving energy-efficient designs.
What is the thermal conductivity of KF?5 answersThe thermal conductivity of KF has been studied in several papers. Experimental measurements using the steady-state variable gap technique were performed on eutectic LiF-NaF-KF, which showed a weak negative deviation of thermal conductivity with temperature. Molecular dynamics simulations using the Green-Kubo method predicted the thermal conductivities of molten alkali fluorides, including KF, and their mixtures. These simulations found that the thermal conductivity follows a scaling law for most systems, but a significant departure from the scaling law was observed in LiF-KF and LiF-NaF-KF mixtures. Another study used the plane heat-wave technique to measure the thermal conductivity of KF at ambient temperatures and pressures up to 3.8 GPa, finding that the effect of optic phonons in KF is negligible. However, the specific conductivity of the KF-K2TaF7 system was found to decrease with the addition of K2TaF7.
How thermally conductive is wood?7 answers
What is considered high thermal conductivity?10 answers
Which material has a lower thermal conductivity than rockwool?7 answers