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研究了铁钛共掺蓝宝石(Fe, Ti: Sapphire)晶体的常温力学性能. 采用泡生法技术生长了尺寸为ø180 × 280 mm3质量为30 kg的 Fe, Ti: Sapphire晶体. 实验发现, 在蓝宝石晶体中掺入Fe2O3和TiO2以及相应的热处理可以显著提高晶体常温断裂强度、表面硬度和断裂韧性, 而不损害晶体的可见和近红外透过性能; 掺入的Fe2O3其Fe3+对Al3+ 的取代作用导致晶体内应力的增加, 掺入的TiO2其Ti4+ 热处理时结晶出的第二相针状晶体的韧化效应, 均对Fe, Ti: Sapphire晶体的力学性能的提高具有重要作用. 研究对我国实现高强蓝宝石晶体应用材料具有重要现实意义.Mechanical properties of titanium and iron co-doped Sapphire crystal are first studied at room temperature Large (ø180 × 280 mm3 in dimension 30 kg in weight) titanium and iron codoped sapphire single crystal is grown by the Kyropoulos technique It is shown that the fracture strength and surface hardness and fracture toughness of as-grown crystals are significantly improved and the visible-infrared optical property is not adversely affected by titanium and iron codoping and certain heat treatment. The Fe3+ in the doped Fe2O3 palys a role of substituting Al3+, leading to an in creased internal stress in the crystal. And the Ti4+ in the doped TiO2 crystallizes the second phase needle crystal and brings in a toughening effect through certain heat treatment. As a consequence, the mechanical properties of as-grown sapphire are improved at room temperature. The present work has the realistic significance for developing the sapphires of excellent mechanical properties.
[1] Akselrod M S, Bruni F J 2012 J. Crystal Growth 360 134
[2] Lee H C, Meissner H E 2007 Proc. SPIE 6545 65450K
[3] Xu S R, Hao Y, Zhang J C 2011 Chin. Phys. B 20 107802
[4] Castillo Rodriguez M, Munoz A, Castaing J 2007 J. Eur. Ceram. Soc. 27 3317
[5] Savrun E, Scott W D, Harris D C 2001 J. Mater. Sci. 36 2295
[6] Song Y F, Yu G Y, Yin H D, Zhang M F, Liu Y Q, Yang Y Q 2012 Acta Phys. Sin. 61 064211 (in Chinese) [宋云飞, 于国洋, 殷合栋, 张明福, 刘玉强, 杨延强 2012 61 064211]
[7] Wang Y, Qi M, Li G Q 2008 Mater. Lett. 62 1444
[8] Dezsi I, Szucs I, Fetzer C 2008 J. Appl. Phys. 104 034904
[9] Kirkpatrick A, Harris D C, Johnson L F 2001 J. Mater. Sci. 36 2195
[10] Nehari A, Brenier A, Panzer G 2011 Crystal Growth and Design 11 445
[11] Moon A R, Phillips M R 1994 J. Am. Ceram. Soc. 77 356
[12] Guan Z D, Zhang Z T, Jiao J S 1992 Physical Properties of Inorganic Materials (1st Ed.) (Beijing: Tsinghua University Press) p22, 42 (in Chinese) [关振铎, 张中太, 焦金生 1992 无机材料物理性能 (第1版) (北京: 清华大学出版社) 第22, 42页]
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[1] Akselrod M S, Bruni F J 2012 J. Crystal Growth 360 134
[2] Lee H C, Meissner H E 2007 Proc. SPIE 6545 65450K
[3] Xu S R, Hao Y, Zhang J C 2011 Chin. Phys. B 20 107802
[4] Castillo Rodriguez M, Munoz A, Castaing J 2007 J. Eur. Ceram. Soc. 27 3317
[5] Savrun E, Scott W D, Harris D C 2001 J. Mater. Sci. 36 2295
[6] Song Y F, Yu G Y, Yin H D, Zhang M F, Liu Y Q, Yang Y Q 2012 Acta Phys. Sin. 61 064211 (in Chinese) [宋云飞, 于国洋, 殷合栋, 张明福, 刘玉强, 杨延强 2012 61 064211]
[7] Wang Y, Qi M, Li G Q 2008 Mater. Lett. 62 1444
[8] Dezsi I, Szucs I, Fetzer C 2008 J. Appl. Phys. 104 034904
[9] Kirkpatrick A, Harris D C, Johnson L F 2001 J. Mater. Sci. 36 2195
[10] Nehari A, Brenier A, Panzer G 2011 Crystal Growth and Design 11 445
[11] Moon A R, Phillips M R 1994 J. Am. Ceram. Soc. 77 356
[12] Guan Z D, Zhang Z T, Jiao J S 1992 Physical Properties of Inorganic Materials (1st Ed.) (Beijing: Tsinghua University Press) p22, 42 (in Chinese) [关振铎, 张中太, 焦金生 1992 无机材料物理性能 (第1版) (北京: 清华大学出版社) 第22, 42页]
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