一、引言 复合材料是当前材料科学中的一个重要发展方向。利用复合材料的乘积效应和加和效应,通过改变复合材料的复合度、联结型和对称睦可以大幅度地调整其物性张量元的数值,从而实现最佳的配比以获得较大优值,甚至可开发研制出具有新效应的新型材料。然而,在复合材料的研究和制备中,选择合适的基元是十分重要的。 I. Introduction Composite materials is an important development direction in the current material science. By using the multiplicative effect and additive effect of composite material, the value of physical tensor element can be greatly adjusted by changing the complex degree, the bond type and the symmetry of the composite material so as to achieve the optimal ratio to obtain a larger merit value, or even Can develop new materials with new effects. However, in the research and preparation of composites, it is very important to choose the appropriate element.