发明授权
US06673330B1 Single crystal of lithium niobate or tantalate and its optical element, and process and apparatus for producing an oxide single crystal
有权
铌酸锂或钽酸锂的单晶及其光学元件，以及用于生产氧化物单晶的工艺和设备
- 专利标题： Single crystal of lithium niobate or tantalate and its optical element, and process and apparatus for producing an oxide single crystal
- 专利标题（中）： 铌酸锂或钽酸锂的单晶及其光学元件，以及用于生产氧化物单晶的工艺和设备
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申请号： US09521899申请日： 2000-03-09
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公开(公告)号： US06673330B1公开(公告)日： 2004-01-06
- 发明人: Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Shigeyuki Kimura
- 申请人： Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Shigeyuki Kimura
- 优先权： JP11-084999 19990326; JP11-317565 19991109; JP11-317572 19991109
- 主分类号： C01D1500
- IPC分类号： C01D1500
摘要：
A single crystal of lithium niobate or lithium tantalate may be grown from a melt of a composition having a molar excess of Li compared to a melt having the stoichiometric amount of lithium, and having a molar fraction of Li2O/(Nb2O5+Li2O) or Li2O/(Ta2O5+Li2O) within a range of at least 0.490 and less than 0.500. The single crystal also has at least one element selected from the group consisting of Mg, Zn, Sc and In, in an amount of from 0.1 to 3.0 mol % based on the total amount of the elements, Nb and Li, or the total amount of the elements, Ta and Li.
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