关键词: 粉煤灰;助熔剂;熔融温度

Abstract: Foam ceramic was prepared by using fly ash as the main material,and sodium borate, potassium feldspar and dolomite as fluxing agents.Projective photographic instrument was employed to observe the changing of volume shrinkage, expansion and complete spheroidization at high temperature, and the corresponding temperature was recorded on various conditions as well.Thus, the relationship between the different types and addition amount of fluxing agents with the melting temperature was discussed.The results showed when 50wt% fly ash, 10wt% borax and 40wt% potassium feldspar and dolomite were mixed, while keeping the ratio of potassium feldspar to dolomite to be 3∶1, the fabricated foam ceramics had excellent melting foaming behavior.

Key words: fly ash;flux;melting temperature