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Morphology evolution and properties of hollow glass beads via dried-gel particles method
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نویسنده
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wu x.-f. ,li x.-c. ,ding j.-g. ,zhao y.-k. ,wang y.-h.
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منبع
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journal of the chemical society of pakistan - 2012 - دوره : 34 - شماره : 4 - صفحه:1007 -1011
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چکیده
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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 hgb 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.
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کلیدواژه
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Hollow glass beads; Morphology evolution; Sol-gel
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آدرس
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school of materials science and engineering,shijiazhuang tiedao university,shijiazhuang 050043,china,school of materials science and engineering,tianjin university, China, school of materials science and engineering,shijiazhuang tiedao university, China, school of materials science and engineering,shijiazhuang tiedao university, China, school of materials science and engineering,shijiazhuang tiedao university, China, school of materials science and engineering,shijiazhuang tiedao university, China
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Authors
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