公开(公告)号：US5482001A

公开(公告)日：1996-01-09

申请号：US318251

申请日：1994-10-05

申请人： Tomoko Katoono ,  Hideki Tominaga

发明人： Tomoko Katoono ,  Hideki Tominaga

IPC分类号： G02B1/02 ,  C30B9/00 ,  C30B29/30 ,  C30B15/02

CPC分类号： C30B9/00 ,  C30B29/30

摘要： A process for producing a lithium niobate single crystal which comprises restricting the variation of the Curie point due to the effect of impurities within a specific range in the accurate evaluation of the composition of the lithium niobate single crystal by the use of the Curie point. To produce a lithium niobate single crystal by using, singly or in combination, lithium carbonate having a purity of 99.99% or higher and simultaneously satisfying the condition that the contents therein of elements Na, K, Mg, and A1 are 5.0 ppm or less, 2.0 ppm or less, 0.5 ppm or less, and 0.9 ppm or less, respectively, and niobium pentoxide having a purity of 99.99% or higher and simultaneously satisfying the condition that the contents therein of elements Na, K, Mg, Al, and Cl are 3.0 ppm or less, 1.0 ppm or less, 0.5 ppm or less, 0.9 ppm or less, and 3.0 ppm or less, respectively, according to an ordinary method.

摘要翻译： 一种铌酸锂单晶的制造方法，其特征在于，通过使用居里点来精确评价铌酸锂单晶的组成，可以限制由于杂质的影响而产生的居里点的变化。 为了通过单独或组合使用纯度为99.99％以上的碳酸锂并同时满足元素Na，K，Mg和Al的含量为5.0ppm以下的条件来制造铌酸锂单晶， 分别为2.0ppm以下，0.5ppm以下，0.9ppm以下，以及纯度为99.99％以上的五氧化二铌，同时满足元素Na，K，Mg，Al，Cl的含量 根据常规方法分别为3.0ppm以下，1.0ppm以下，0.5ppm以下，0.9ppm以下，3.0ppm以下。