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Method for producing high purity potassium fluorotantalate crystal or high purity potassium fluoroniobate crystal and recrystallization vessel for use in the method for production, and potassium flurotantalate crystal or high purity potassium fluoroniobate crystal produced by the method for production
Method for producing high purity potassium fluorotantalate crystal or high purity potassium fluoroniobate crystal and recrystallization vessel for use in the method for production, and potassium flurotantalate crystal or high purity potassium fluoroniobate crystal produced by the method for production
It is an object to provide a product having a good crystal particle size distribution of a high-purity potassium fluorotantalate crystal or a high-purity potassium fluoroniobate crystal without using a physical method for particle classification. To that end, a method for manufacturing a high-purity potassium fluorotantalate crystal or a high-purity potassium fluoroniobate crystal is used, wherein the recrystallizing step comprising a first cooling process of cooling a saturated solution with a temperature of 60 C. to 90 C. obtained in the dissolving step at a cooling speed of T C./hour until the solution temperature of the saturated solution becomes a temperature of the range of 35 to 50 C., and a second cooling process of cooling the solution at a cooling speed of T-18 C./hour to T-1 C./hour from the end of the first cooling process to the solution temperature becoming a temperature of 10 to 20 C.
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机译:一个目的是提供一种具有高纯度氟钽酸钾晶体或高纯度氟铌酸钾晶体的晶体粒径分布良好的产品,而无需使用物理方法进行颗粒分类。为此,使用了用于制造高纯度氟钽酸钾晶体或高纯度氟铌酸钾晶体的方法,其中重结晶步骤包括将饱和溶液冷却至60℃至90℃的第一冷却步骤。在溶解步骤中以T C. /小时的冷却速度获得的H 2 O 2直至饱和溶液的溶液温度达到35至50 C范围的温度,以及以冷却速度冷却溶液的第二冷却过程从第一次冷却过程结束到溶液温度变为10至20摄氏度的温度从T-18摄氏度/小时提高到T-1摄氏度/小时。
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