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Citation: YE Ming-Quan, HAN Ai-Jun, LI Feng-Sheng. Preparation of NaHCO₃/Silica White Composite Particles for Cold Aerosol Fire Extinguishing Agents[J]. Chinese Journal of Applied Chemistry, ;2004, 21(8): 810-813. shu

Preparation of NaHCO₃/Silica White Composite Particles for Cold Aerosol Fire Extinguishing Agents

1.
National Research Center of Special Superfine Powder Engineering, Nanjing University of Science & Technology, Nanjing 210094

Corresponding author: YE Ming-Quan,
Received Date: 19 September 2003
Available Online: 24 February 2004

Superfine NaHCO₃ powder and its composite particles with carbon-white were prepared. The size, shape, structure and application performance of the composite particles have been characterized. The results show that the tight ball-shape NaHCO₃/SiO₂ composite particles are formed as a result of physical adsorption of NaHCO₃ particles on the surface or hole of carbon-white. There are no new materials formed in the mixing process. During the mixing, the strong mechanical force makes the surface structure of the NaHCO₃ distorted and both the distortion of crystal structure and the amorphous level of the particle surface increased with increasing of the composite time. The dispersion and suspension stability of NaHCO₃ powder in the air have been improved. The cold aerosol fire extinguishing agent prepared from composite particles shows good fire extinguishing quality.
- aerosol,
- sodium bicarbonate,
- carbon-white composite particle,
- dry chemical fire extinguishing agent,
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Preparation of NaHCO₃/Silica White Composite Particles for Cold Aerosol Fire Extinguishing Agents