low expansion coefficient,high temperature resistance,high intensity, high rigidity, ... condition of 20-300°C, coefficient of mean linear expansion is 3.3±0.1(10-6K-1)The ... of special type glass material with the features of low expansion coefficient,high temperature resistance,high intensity, high rigidity, ... 0.2%Chemical properties:1.Coefficient of mean linear thermal expansion: (20°C/300°C):3.3 ±0.1 ...