caa a22 4500 463224310 CHVBK 20180405153222.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10853-007-1600-3 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1600-3 Effects of antioxidants and the solid component on the thermal stability of polyol-ester-based thermal pastes [Elektronische Daten] [Yasuhiro Aoyagi, D. Chung] The thermal stability of polyol-ester-based thermal pastes is evaluated by weight loss, viscosity and thermal contact conductance measurements. A high degree of thermal stability has been attained by using a half-hindered phenolic primary antioxidant and a thiopropionate secondary antioxidant. By using either carbon black or boron nitride particles as the solid component, a thermally conductive paste with a high degree of thermal stability has been attained. The antioxidants cause the residual weight (excluding the solid component) after oven aging at 200°C for 24h to increase from 36 to 97wt.%. They cause the viscosity not to increase upon heating and they reduce the thermal cracking tendency. They do not affect the thermal contact conductance measured across mating surfaces that sandwich the paste. The use of a fully-hindered phenolic primary antioxidant is less effective. Both carbon black and boron nitride serve as antioxidants in the presence of either primary antioxidant or secondary antioxidant at 200°C, though, in most cases, they degrade the thermal stability in the presence of both primary and secondary antioxidants, particularly at 220°C. Below 180°C and in the presence of primary and secondary antioxidants, boron nitride is particularly effective in promoting the thermal stability. Boron nitride paste shows an estimated lifetime of 19years at 100°C, compared to 1.3years for the carbon black paste, and 0.10year for commercial polyol-ester-based Arctic Silver 5. Carbon black paste has a lower tendency for cracking after heating than boron nitride paste, due to the low volume fraction of the solid component. Springer Science+Business Media, LLC, 2007 Aoyagi Yasuhiro Composite Materials Research Laboratory, University at Buffalo State University of New York, 14260-4400, Buffalo, NY, USA aut Chung D. Composite Materials Research Laboratory, University at Buffalo State University of New York, 14260-4400, Buffalo, NY, USA aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/7(2007-04-01), 2358-2375 0022-2461 42:7<2358 2007 42 10853 https://doi.org/10.1007/s10853-007-1600-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1600-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aoyagi Yasuhiro Composite Materials Research Laboratory, University at Buffalo State University of New York, 14260-4400, Buffalo, NY, USA aut NATIONALLICENCE 700 1- Chung D. Composite Materials Research Laboratory, University at Buffalo State University of New York, 14260-4400, Buffalo, NY, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/7(2007-04-01), 2358-2375 0022-2461 42:7<2358 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer