Mn^（2＋）激活的镉铝锗酸盐石榴石合成和阴极射线发光

Synthesis and cathodoluminescence of Mn￣(2+)── Activated Cd_3Al_2Ge_3O_(12) Garnet Phosphor

利用分步法高温固相反应合成Ｃｄ＿３Ａｌ＿２Ｇｅ＿３Ｏ＿（１２）基质和Ｃｄ＿３Ａｌ＿２Ｇｅ＿３Ｏ＿（１２）：Ｍｎ石榴石荧光粉，给出立方晶格常数，研究材料的阴极射线发光性质。Ｃｄ＿３Ａｌ＿２Ｇｅ＿３Ｏ＿（１２）：Ｍｎ石榴石具有较长的黄色余辉特性，是一种抗闪烁材料。微量过渡金属杂质对锗酸盐石榴石发光产生严重猝灭作用。

Cd_3Al_2Ge_3O_(12)(abbr: CAGG)andCd_3Al_2Ge_3O_(12):Mn(abbr:CAGG:Mn)garnetphosphors were synth6Sized by solid state reactionwith″staircase″temperature.Their crystal latticeconstant (a_0 ) are given. Cathodoluminescence(CL)properties of the CAGG host and CAGG:Mn gar-nets are reported. The yellow-emitting CAGG:Mngarnet shows a longer persistence. The CL spectraof CAGG : Mn garnets depending on Mn￣(2+) concentration consists of the blue emission. band of thehost and the yellow emission band of Mn￣(2+)ion.Theproperty of the yellow emission band of Mn￣(2+) centrein CAGG garnet is discussed.The luminescence ofthis germanate garnets is strongly quenched bytransition metal impurities.