Carbon nanotube (CNT) forest/cluster synthesized by a thermal CVD process has millimeter growth height, large porosity and nano level pore size, plus high thermal conductivity of individual CNT, thus it is potentially a good wick structure material in developing micro heat transfer devices. However, thermal properties, including effective thermal conductivity (ETC) of a bulky CNT layer, may not be as good as the common metallic wick materials. In this paper, a Netzsch DSC 404 C Pegasus is used for measurement of the CNT heat capacity. CNT volume density is obtained by measuring the ratio of a bulky CNT weight and volume. Both the laser flash and 3-omega measurement methods are employed to measure ETC for CNT wick structures synthesized by the thermal CVD processes. For the laser flash method, measurement deviations caused by reflective silicon and thin substrate are corrected by surface treatment and increased sample thickness. Measurement results of the laser flash indicate that a 600μm thick CNT layer has ETC varying from 0.7–1.2W/m.K. For the 3-omega approach, the measurement system is validated on a quartz substrate. However, the test results yield larger ETC on 250μm CNT samples. Geometric and one dimensional thermal conduction analysis indicate that the bulky CNT thermal properties are tied to CNT synthesis processes. ETC of bulky CNT layer can be enhanced by straightening CNT growth and increasing CNT growth volume density.
Skip Nav Destination
ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4357-4
PROCEEDINGS PAPER
Thermal Property Measurements of Carbon Nanotube Forest Synthesized by Thermal CVD Process
Qingjun Cai,
Qingjun Cai
Teledyne Scientific & Image Company, Thousand Oaks, CA
Search for other works by this author on:
Bing-chung Chen,
Bing-chung Chen
Teledyne Scientific & Image Company, Thousand Oaks, CA
Search for other works by this author on:
Yuan Zhao,
Yuan Zhao
Teledyne Scientific & Image Company, Thousand Oaks, CA
Search for other works by this author on:
Julia Mack,
Julia Mack
Teledyne Scientific & Image Company, Thousand Oaks, CA
Search for other works by this author on:
Yanbao Ma,
Yanbao Ma
Teledyne Scientific & Image Company, Thousand Oaks, CA
Search for other works by this author on:
Chung-lung Chen,
Chung-lung Chen
Teledyne Scientific & Image Company, Thousand Oaks, CA
Search for other works by this author on:
Hengzhi Wang,
Hengzhi Wang
Boston College, Chestnut Hill, MA
Search for other works by this author on:
Zhifeng Ren
Zhifeng Ren
Boston College, Chestnut Hill, MA
Search for other works by this author on:
Qingjun Cai
Teledyne Scientific & Image Company, Thousand Oaks, CA
Bing-chung Chen
Teledyne Scientific & Image Company, Thousand Oaks, CA
Yuan Zhao
Teledyne Scientific & Image Company, Thousand Oaks, CA
Julia Mack
Teledyne Scientific & Image Company, Thousand Oaks, CA
Yanbao Ma
Teledyne Scientific & Image Company, Thousand Oaks, CA
Chung-lung Chen
Teledyne Scientific & Image Company, Thousand Oaks, CA
Hengzhi Wang
Boston College, Chestnut Hill, MA
Zhifeng Ren
Boston College, Chestnut Hill, MA
Paper No:
HT2009-88076, pp. 443-449; 7 pages
Published Online:
March 12, 2010
Citation
Cai, Q, Chen, B, Zhao, Y, Mack, J, Ma, Y, Chen, C, Wang, H, & Ren, Z. "Thermal Property Measurements of Carbon Nanotube Forest Synthesized by Thermal CVD Process." Proceedings of the ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. Volume 2: Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Computational Heat Transfer. San Francisco, California, USA. July 19–23, 2009. pp. 443-449. ASME. https://doi.org/10.1115/HT2009-88076
Download citation file:
11
Views
Related Proceedings Papers
Related Articles
Impact of Thermodiffusion on Carbon Nanotube Growth by Chemical Vapor Deposition
J. Heat Transfer (August,2010)
In Situ Measurement of Carbon Nanotube Growth Kinetics in a Rapid Thermal Chemical Vapor Deposition Reactor With Multizone Infrared Heating
J. Micro Nano-Manuf (March,2020)
Thermal Transport During Nanoscale Machining by Field Emission of Electrons from Carbon Nanotubes
J. Heat Transfer (August,2003)
Related Chapters
Preparation and Thermal Property of Phase Change Nanocomposites Using Carbon Nanotubes as Additives
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Layer Arrangement Impact on the Electromechanical Performance of a Five-Layer Multifunctional Smart Sandwich Plate
Advanced Multifunctional Lightweight Aerostructures: Design, Development, and Implementation
Characterization of Ultra-High Temperature and Polymorphic Ceramics
Advanced Multifunctional Lightweight Aerostructures: Design, Development, and Implementation