科研之友
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摘要
Hollow glass beads (HGB) were prepared in a vertical furnace by adopting urea as blowing agent and liquid sodium silicate as main raw material. The effects of weight fraction of urea, firing time and average size of dried-gel particles on the formation of HOB were discussed. Experiment results showed that increasing the weight fraction of urea and the firing time could improve the morphology and the hollow structure of the products, and appropriate parameters were 4.5wt% and 2.5s, respectively. Moreover, using the dried-gel particles with small size were in favor of obtaining HGB with relatively small size, thick wall and high static pressure strength. In addition, the possible mechanism for the formation of HGB was presented.
- 出版日期2012-8
- 单位天津大学
