کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1794813 1023707 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Axial stoichiometry variations in lithium niobate crystals grown from near-congruent melts
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Axial stoichiometry variations in lithium niobate crystals grown from near-congruent melts
چکیده انگلیسی
Eleven lithium niobate crystals were grown using the Czochralski method from melts deviating from the congruent melting composition and the resulting axial variation of the crystal composition was analyzed using Curie temperature measurements. The weight of the melts was 7 kg, and grown crystals had solidifying mass ratios in excess of 90%. A mathematical model to predict axial compositional variations in the crystals was developed and integrated numerically to estimate the value of the effective distribution coefficient. A linear relationship between the effective distribution coefficient and the melt composition accurately describes the solid compositions of crystals grown from melts ranging from 45.1% to 51.7% Li2O. It is shown that for growth conditions suitable for volume production and large crystal diameters, the difference between the effective and equilibrium distribution coefficient is well below 0.2%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 310, Issue 18, 15 August 2008, Pages 4280-4285
نویسندگان
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