Ultrafine Glass Fibers Produced by Centrifugal-Spinneret-Blow Process

In this paper, glass fibers were prepared by centrifugal-spinneret-blow(CSB)process. The diameter and microstructure of glass fibers have been investigated by scanning electron microscopy(SEM)and vertical optical microscope(VOM).The thermal conductivity and the thickness of glass fiber samples were determined by heat flow meter thermal conductivity instrumentation.The results indicated that the diameter of glass fibers prepared by CSB process can reach the ultrafine grade by adjusting the ratio of raw materials and process parameters.The thermal conductivity of glass fiber sample was 0.0298W/(m·K)when the diameter was 3μm and the density was 62kg/m3.The thermal conductivity of glass fiber sample decreased with the reduction of fiber diameter when the density of glass fiber sample is constant.