Nd：Ca_5（PO_4）_3F激光晶体中夹杂物的分析

Analyses of Inclusions in Neodymium Doped Calcium Fluorophosphate Laser Crystals

采用提拉法生长了Ｎｄ：Ｃａ＿５（ＰＯ＿４）＿３Ｆ晶体。用扫描电镜和电子探针对夹杂物进行了分析。分析表明，晶体中的夹杂物是由组分过冷引起的富磷缺氟相组成的。提出了形成夹杂物的原因及消除办法。

Neodymium doped calcium fluorophosphate(Nd:Ca_5(PO_4))_3 F crystals have been grown by the CZ technique. Main inclusions in the crystals have been analysed with SEM and EPMA (electronic probe microanalysis).The analysed result show that in Nd :Ca_5 (PO_4 )_3F crystal inclusions are composed of phase of purplus phosphorus and lack iron. Which arises from constitutional supercooling in crystal growth.The formation mechanism and elimination of the inclusions are proposed.