Thermal conductivity of amorphous solids above the plateau
Abstract
We have measured the thermal conductivity of polymethylmethacrylate (PMMA), amorphous ${\mathrm{As}}_{2}$${\mathrm{S}}_{3}$, Ca-K nitrate glass, three ${\mathrm{SiO}}_{2}$-based glasses, and glycerol in the temperature range 30--300 K, using an ac technique that eliminates errors from blackbody radiation. This technique and the problems of blackbody radiation in thermal measurements are discussed in detail. Our data do not support a recent prediction of heat transport by fractons. Instead, we find that the thermal conductivity of these glasses above \ensuremath{\sim}50 K is well described by the minimum thermal conductivity suggested by Slack.
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Errors due to black-body radiation scale with a characteristic length of the experimental geometry.
“Errors due to blackbody radiation can be shown to scale with a characteristic length of the experimental geometry by estimating the ratio of the heat radiated to the heat conducted through the sample.6”
From Thermal conductivity measurement from 30 to 750 K: the 3ω method (1990) · cites this paper as [6]
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- Authors
- Cahill, D. G., & Pohl, R. O.
- Affiliations
- Cornell University (US)
- ORCID
- Cahill, David G.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 1987-03-15
- Volume
- 35
- Issue
- 8
- Pages
- 4067-4073
- ISSN
- 0163-1829 (ISSN-L)
- OpenAlex
- W1976543642
- Cited by
- 813
- References
- 0
- Citations by year
- 2026: 16 · 2025: 27 · 2024: 24 · 2023: 38 · 2022: 32 · 2021: 40 · 2020: 34 · 2019: 40 · 2018: 55 · 2017: 24 · 2016: 38 · 2015: 40 · 2014: 31 · 2013: 32 · 2012: 30
- FWCI
- 8.40
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Physical review. B, Condensed matter (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Material Dynamics and Properties
- Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
- Physical Sciences › Materials Science › Ceramics and Composites › Glass properties and applications
- Keywords
- thermal conductivity, amorphous materials, glassy materials, poly(methyl methacrylate), silicate glass, glycerol, low-temperature thermal transport, fractons, heat transport
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