Thermal Expansion of Platinum from 293 to 1900 K

Abstract

Measurements on the thermal expansion of three samples of high‐purity platinum were made with a Fizeau interferometer in the range below 1000 K and with a twin‐microscope method in the high temperature range. The results obtained indicate that the expansion of the three samples are in excellent agreement with one another and with some of the data in the literature. From 293 to 1900 K the linear thermal expansion of the three samples is given by LT−L293L293×106 = −2279+6.117T+8.251×10−3T2−1.1187×10−5T3+9.1523×10−9T4−3.6754×10−12T5+5.893×10−16T6.