一、引言 超细玻璃棉是公认的优良的多孔性吸声材料,它具有很高的中高频吸声系数,而且可以使用在300℃至500℃左右较高的温度。但它也有缺点:刺激皮肤、有奇痒感;遇水后吸声系数大大降低;玻璃纤维极易吹散,不适用于流速较大或需要清洁气流的场合。 I. Introduction Superfine glass wool is recognized as an excellent porous sound-absorbing material. It has high mid-high frequency sound absorption coefficient and can be used at higher temperature of about 300 ℃ to 500 ℃. But it also has the disadvantage of irritating the skin and itching feeling, greatly reducing the sound absorption coefficient after encountering water, and the glass fiber is very easy to blow off, which is not suitable for situations where the flow velocity is larger or the airflow needs cleaning.