1.Introduction

Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. It is an industrial mineral and a commercial product useful for its light weight after processing.

2.Application

Because of its low density and relatively low price , many commercial applications for perlite have developed. In the construction and manufacturing fields, it is used in lightweight plasters and mortars, insulation and ceiling tiles.

In horticulture, perlite can be used as a soil amendment or alone as a medium for hydroponics or for starting cuttings. When used as an amendment it has high permeability / low water retention and helps prevent soil compaction.

Perlite is an excellent filter aid. It is used extensively as an alternative to diatomaceous earth. The popularity of perlite usage in this application is growing considerably worldwide. Perlite filters are fairly commonplace in filtering beer before it is bottled.

Small quantities of perlite are also used in foundries, cryogenic insulation, as a lightweight aggregate in mortar (firestop) and in ceramics as a clay additive. It is also used by the explosives industry.

膨胀珍珠岩的以其良好的保温效能，超强的稳定性能很好的被市场接受并发挥其效应，而且应用范围广，具有普遍的实用性，尤其在耐火保温节能方面发挥优异的性能。

细数优异性能，可以说数不胜数。不仅仅具有良好的环保性能，有广泛应用的经济和社会价值，施工极其便利、易于维修，撞击性能优于其它任何一种保温材料，抗湿热性能优良，而且还有较好的防火性能。

其中耐久性与建筑物同寿命，彻底打破了有机物外墙保温材料平均使用寿命25年的界线。由于岩能无机保温材料系统是无机产品，永不老化。而且是无缝界施工，从而对建筑物形成全胶塑包裹保护作用。

在正常使用条件下，如遇干燥、严寒、高温、潮湿、电化腐蚀或昆虫、真菌或藻类生长，以及因锯齿动物的破坏、物体撞击等种种侵袭，都不致造成损害，大大地延长建筑物的使用寿命。其保温材料的使用年限与建筑物同寿命。