A Study on the Fabrication of Hollow Glass Sphere by Using a Liquid-mix Precursor

혼합액상 전구체를 이용한 유리 중공구체의 제조에 관한 연구

  • Lee, Yong Bin (Department of Chemical Engineering, Hanyang University) ;
  • Kim, Ki Do (Department of Chemical Engineering, Hanyang University) ;
  • Kim, Hee Taik (Department of Chemical Engineering, Hanyang University)
  • 이용빈 (한양대학교 공과대학 화학공학과) ;
  • 김기도 (한양대학교 공과대학 화학공학과) ;
  • 김희택 (한양대학교 공과대학 화학공학과)
  • Received : 1999.08.19
  • Accepted : 1999.11.23
  • Published : 1999.12.10

Abstract

By using a liquid-mix precursor, we prepared the hollow glass spheres(HGS) as an additive of polymer compound which are used in the field of modifier, promoter, filler, and reinforcement. Liquid-mix precursor is a mixture of 40% sodium silicate aqueous solution, boric acid as a insolubilizing agent, and urea as a blowing agent. To obtain the precursor particles which are fed into a gas flame furnae, the above liquid-mix precursor was dried in oven and crushed with ball mill. We assumed the size of precursor particles ($53{\sim}63{\mu}m$, $63{\sim}180{\mu}m$), temperature of furnace($800{\sim}1200^{\circ}C$), and amount of urea(0~30 g) as the parameters affecting on the properties of HGS. As a result mean particle size of HGS increases with increasing the temperature of furnace and the amount of urea and with decreasing the size of precursor particles. Also, we found that incresing the amount of urea is related to a decrease of the crush strength of HGS.

Keywords

hollow glass sphere;gas flame furnace;urea;boric acid

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