Room temperature screening of thermal conductivity by means of thermal transient measurements Jorge García-Cañadas a) , Shudan Cheng, Lourdes Márquez-García, Martin J. Prest, Ahmad Akbari-Rahimabadi b and Gao Min c) Cardiff School of Engineering, Cardiff University, Cardiff, CF24 3AA, UK A proof of concept of the possibility to estimate thermal conductivity of bulk disc samples at room temperature by means of thermal decays is demonstrated. An experimental set-up was designed and fabricated, which is able to perform thermal transient measurements by using a specially designed multifunctional probe that has the ability to measure temperature at its tip. Initially, the probe is heated by a heater coil located in its interior until the tip temperature reaches a steady state. Then, the probe is contacted with a disc sample which produces a temperature decay until a new state is reached. The difference between the initial and final states temperatures shows a correlation with the thermal conductivity of the sample. Employing a calibration equation, obtained using reference materials, the thermal conductivity can be calculated. Reasonably good random and systematic errors (<13 % and ~9 % respectively) are obtained. Theoretical simulations performed using COMSOL show a good qualitative agreement with experimental results. This new method involves an inexpensive and simple set-up which can be especially useful for thermal conductivity screening and high-throughput measurements. Keywords: Thermal conductivity, high-throughput, thermoelectric, screening. a Current address: Department of Industrial Systems Engineering and Design, Universitat Jaume I, Campus del Riu Sec, 12071 Castellón, Spain b Current address: Department of Mechanical Engineering, Kermanshah branch, Islamic Azad University, Kermanshah, Iran c Electronic mail: min@cardiff.ac.uk.