Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/92653
Title: A study on magnesium diffusion into LiNbO3 single crystal by x-ray diffraction, differential thermal analysis, and scanning electron microscopy
Authors: Que, W. 
Lim, S. 
Yao, X.
Liu, A.Q.
Issue Date: Dec-1997
Citation: Que, W.,Lim, S.,Yao, X.,Liu, A.Q. (1997-12). A study on magnesium diffusion into LiNbO3 single crystal by x-ray diffraction, differential thermal analysis, and scanning electron microscopy. Journal of Materials Research 12 (12) : 3380-3385. ScholarBank@NUS Repository.
Abstract: The diffusion of magnesium into lithium niobate single crystal under different diffusion conditions has been studied by x-ray diffraction, glancing-incidence x-ray diffraction, differential thermal analysis, and scanning electron microscopy in an attempt to determine the diffusion mechanism and evaluate the crystallinily of the diffused layer. It is found that the magnesium diffused layer exhibits the crystal structure of an unknown compound from the Mg-Li-Nb-O ternary system and MgNb2O6. The MgNb2O6, is in the surface layer of the magnesium diffused layer, while the unknown compound is in the subsurface layer beneath the MgNh2O6. It is proposed that this unknown compound and MgNb2O6 which form during a solid state reaction between a thin layer of MgO and a lithium niobate crystal in a Li2O-rich atmosphere are the real sources for Mg ion indiffusion into lithium niobate crystal. The changes in Curie temperature with diffusion parameters arc noted. Reasons of lattice distortion and mechanisms of Mg ion indiffusion are discussed and analyzed.
Source Title: Journal of Materials Research
URI: http://scholarbank.nus.edu.sg/handle/10635/92653
ISSN: 08842914
Appears in Collections:Staff Publications

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