Method for rapidly testing thermal expansion coefficient of needle coke

The invention relates to the technical field of testing of thermal expansion coefficients of needle coke, in particular to a method for rapidly testing the thermal expansion coefficient of needle coke. 2) preparing a needle coke analysis sample; 3) performing thermomechanical analysis; and 4) calculating: obtaining the mcte value of the sample to be detected through the thermomechanical analyzer, and substituting the mcte value into a linear formula (1) to calculate the thermal expansion coefficient of the sample to be detected after graphitization. Y = aX-b (1), in the formula, a is the slope; b is the intercept; x is a mcte value; y is the thermal expansion coefficient of the graphitized sample to be detected, and the unit is 1E /DEG C. The method for measuring the thermal expansion coefficient of the needle coke is rapid, accurate, simple and convenient, the test period is shortened from 7 days to 6-10 hours, adjustment parameters can be rapidly and accurately provided for the production process, and