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长期以来,扬声器振膜是以纸做原材料,近几年来,已经开始摆脱这种状况,相继出现不少新的材料,如铝、钛、硼、镀、镁等。一般来说,理想的振膜材料应该很轻,比弹性率(杨式模量 E/密度ρ)大,内部损耗大。镁和镁合金可以同时满足这三项要求,是一种较理想的振膜材料。在金属元素中,镁在地球中的贮藏量居第8位,镁与钛同属一种晶体结构,其化合物是一种矿物,在地下有广泛贮藏,因此,材料来
For a long time, the speaker diaphragm is based on paper as raw materials, in recent years, has begun to get out of this situation, have emerged a lot of new materials, such as aluminum, titanium, boron, plating, magnesium and so on. In general, the ideal diaphragm material should be very light, elastic modulus (Young modulus E / density ρ) larger internal loss. Magnesium and magnesium alloys can meet these three requirements, is a more ideal diaphragm material. Among metal elements, magnesium has the eighth largest amount of earth in the earth. Magnesium and titanium belong to the same crystal structure. The compound is a kind of mineral and has a wide range of underground storage. Therefore, the material