The results indicate that the thermal expansion coefficient of Al 2-xY xW 3O 12 can be adjusted to the desired values such as near zero and negative by changing the composition.

• 实验结果表明 ；通过调整稀土钇 (Y)的含量 ；可以使氧化物的本征热膨胀系数和宏观热膨胀系数逐渐由正到负变化 .