Crucible Selection in AIN Bulk Crystal Growth


Growth of AIN bulk single crystals by sublimation of AIN powder was carried out in a resistively heated reactor at temperatures up to 2300°C. A variety of crucible materials, such as BN, W, Ta, Re, ZrO2, TaN, and TaC, were evaluated. Our studies have shown that the morphology of crystals grown by spontaneous nucleation strongly depends on the growth temperature and contamination in the reactor. Crucible selection had a profound effect on contamination in the crystal growth environment, thus influencing nucleation, coalescence, and crystal morphology. Spontaneously grown single crystals up to 15 mm in size were characterized by x-ray diffraction (XRD), x-ray topography (XRT), glow discharge mass spectrometry (GDMS), and secondary ion mass spectrometry (SIMS). Average dislocation densities were on the order of 103 cm−3, with extended areas virtually dislocation-free, while high-resolution XRD showed rocking curves as narrow as 7 arcsec.

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  1. 1.

    J. C. Rojo, G. A. Slack, K. Morgan, B. Raghothamachar, M. Dudley and L. J. Schowalter, J. Cryst. Growth 231, 317 (2001).

    Article  Google Scholar 

  2. 2.

    J. H. Edgar, L. Liu, D. Zhuang, J. Chaudhuri, M. Kuball and S. Rajasingam, J. Cryst. Growth 246, 187 (2002).

    CAS  Article  Google Scholar 

  3. 3.

    R. Schlesser, R. Dalmau and Z. Sitar, J. Cryst. Growth 241, 416 (2002).

    CAS  Article  Google Scholar 

  4. 4.

    B. M. Epelbaum, D. Hofmann, M. Bickermann and A. Winnacker, Mater. Sci. Forum 389–393, 1445 (2002).

    Article  Google Scholar 

  5. 5.

    N. B. Singh, A. Berghmans, H. Zhang, T. Wait, R. C. Clarke, J. Zingaro and J. C. Golombeck, J. Cryst. Growth 250, 107 (2003).

    CAS  Article  Google Scholar 

  6. 6.

    G. A. Slack and T. F. McNelly, J. Cryst. Growth 34, 263 (1976).

    CAS  Article  Google Scholar 

  7. 7.

    M. Bickermann, B. M. Epelbaum and A. Winnacker, phys. stat. sol. (c), accepted for publication (2003).

    Google Scholar 

  8. 8.

    M. Dudley, in Encyclopedia of Advanced Materials, edited by D. Bloor, R. J. Brook, M. C. Flemings and S. Mahajan (Pergamon Press, New York, 1994) p. 2950.

  9. 9.

    B. Raghothamachar, W. M. Vetter, M. Dudley, R. Dalmau, R. Schlesser, Z. Sitar, E. Michaels and J. W. Kolis, J. Cryst. Growth 246, 271 (2002).

    CAS  Article  Google Scholar 

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This project has been funded by the Office of Naval Research under the auspices of the MURI program; grant N00014-01-0716; Dr. C. Wood, project monitor.

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Correspondence to Rafael Dalmau.

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Dalmau, R., Raghothamachar, B., Dudley, M. et al. Crucible Selection in AIN Bulk Crystal Growth. MRS Online Proceedings Library 798, 361–365 (2003).

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