Effect of substituting Al(2)O(3) and ZrO(2) on thermal and optical properties of high refractive index La(2)O(3)-TiO(2) glass system prepared by containerless processing

[摘要]：La(4)Ti(9)O(24) glass and La(2)O(3)-TiO(2)-Al(2)O(3) and La(2)O(3)-TiO(2)-ZrO(2) glass systems were prepared by containerless processing. The thermal stability and refractive indices of these glasses were investigated. It was found that these glasses had high refractive indices over 2.29 and high glass transition temperatures. The effects of substituting Al(2)O(3) or ZrO(2) for La(2)O(3) or TiO(2) in La(4)Ti(9)O(24) glass on the refractive index is discussed by analyzing the optical parameters of the glasses. The high refractive index of these glasses was due to their large oxygen packing densities and significant electronic polarizabilities of oxygen ions. The substitution of Al(2)O(3) and ZrO(2) was effective for the refractive indices and wavelength dispersions. (C) 2011 Elsevier B.V. All rights reserved.

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