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Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (4): 747-751.

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Alumina/Polyimide Composite Porous Nanosolid: Dielectric Characteristics and Compressive Strength

LUAN Chun-hong, GENG Yu-jing, YU Qin-qin, CAO Li-li, LIAN Gang, CUI De-liang   

  1. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China
  • Received:2012-02-13 Revised:2012-03-02 Online:2012-07-25 Published:2012-07-25
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.50990061, 51021062, 21073107 and 51102151), the Postdoctoral Science Foundation of China(No.20100481245), the Natural Science Foundation(No.ZR2011EMQ002) and the Postdoctoral Innovation Foundation(No.201003077) of Shandong Province, China.

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Abstract: Al2O3 porous nanosolid was prepared via solvothermal hot-press(SHP) method. The dielectric constant of Al2O3 porous nanosolid is as low as 2.34, while its compressive strength is very poor. In order to improve the compressive strength and maitain low dielectric constant, polyimide was introduced to prepare Al2O3/polyimide composite porous nanosolid. Compared to Al2O3 porous nanosolid, Al2O3/polyimide composite porous nanosolid possesses much higher compressive strength, which reaches its saturation value when the mass loading of polyimide is 7.75%. In addition, the in situ Fourier transformation infrared(FTIR) monitoring result reveals that Al2O3/polyimide composite porous nanosolid is stable up to 400℃.

Key words: Al2O3 porous nanosolid, Compressive strength, Solvothermal hot-press, Low dielectric constant