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Synthesis and Characterization of Fiberous AlN by Electrospinning

전기방사에 의한 섬유상 질화알루미늄 합성 및 특성 평가

  • Received : 2017.05.15
  • Accepted : 2017.06.01
  • Published : 2017.07.01

Abstract

Aluminum nitride fibers were synthesized by carbothermal reduction and nitridation of precursor fibers obtained by electrospinning. The starting materials used to synthesize the AlN fibers were $Al(NO_3)_3{\cdot}9H_2O$ and urea. Polyvinylpyrrolidone with increasing viscidity was used as the carbon source to obtain a composite solution. The mixed solution was drawn into a plastic syringe with a stainless steel needle, which was used as the spinneret and connected to a 20 kV power supply. A high voltage was supplied to the solution to facilitate the formation of a dense net of fibers on the collector. The precursor fibers were dried at $100^{\circ}C$ and then heated to $1,400^{\circ}C$ for 1 h in a microwave furnace under $N_2$ gas flow for the carbothermal reduction and nitridation. X-ray diffraction studies indicated that the synthesized fibers consisted of the AlN phase. Field emission scanning electron microscopy studies indicated that the diameter of the calcined fibers was approximately 100 nm.

Acknowledgement

Grant : EV/HEV의 연비향상을 위한 30 W/mK의 고방열 나노세라믹접착 재료 개발

Supported by : 한국산업기술평가관리원

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