Investigation of dielectric properties of cold C3F8 mixtures and hot C3F8 gas as Substitutes for SF6 Xiaohua Wang, Linlin Zhong, Jing Yan, Aijun Yang, Guohui Han, Guiquan Han, Yi Wu and Mingzhe Rong Eur. Phys. J. D, 69 10 (2015) 240 Published online: 29 October 2015 DOI: 10.1140/epjd/e2015-60327-9