Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Synthesis of Fine Ba-Nd-Ti-O Powders by Spray Pyrolysis from Spray Solution with Sucrose

수크로스 함유 분무용액으로부터 분무열분해 공정에 의한 미세 Ba-Nd-Ti-O 분말 합성

  • Ko, You-Na (Department of Chemical Engineering, Konkuk University) ;
  • Jung, Dae-Soo (Department of Chemical Engineering, Konkuk University) ;
  • Koo, Hye-Young (Department of Chemical Engineering, Konkuk University) ;
  • Kang, Yun-Chan (Department of Chemical Engineering, Konkuk University)
  • Published : 2010.03.27
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Abstract

Nano-sized $BaNd_2Ti_5O_{14}$ powders were prepared by the spray pyrolysis process. Sucrose used as the organic additive enabled the formation of nano-sized $BaNd_2Ti_5O_{14}$ powders. The powders prepared from the spray solution without sucrose had a spherical shape, dense structure and micron size before and after calcination. However, the precursor powders prepared from the spray solution with sucrose had a large size, and hollow and porous morphology. The precursor powders had an amorphous crystal structure because of the short residence time of the powders inside the hot wall reactor. The complete decomposition of sucrose did not occur inside the hot wall reactor. Therefore, the precursor powders obtained from the spray solution with sucrose of 0.5M had a carbon content of 39.2wt.%. The powders obtained from the spray solution with sucrose of 0.5M had a slightly aggregated structure of nano-sized primary powders of $BaNd_2Ti_5O_{14}$ crystalline phase after calcination at $1000^{\circ}C$. The calcined powders turned into nano-sized $BaNd_2Ti_5O_{14}$ powders after milling. The mean size of the $BaNd_2Ti_5O_{14}$ powders was 125 nm.

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References

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