一种具有倍频效应的新型硼酸盐化合物La_2SrB_(10)O_(19)

A New Nonlinear Optical Material La_2SrB_(10) O_(19)

在SrO La2 O3 B2 O3体系中合成出一种新的硼酸盐化合物La2 SrB10 O19。La2 SrB10 O19的晶体结构与La2 CaB10 O19相同。La2 SrB10 O19的粉末倍频效应 (SHG)大约是KH2 PO4 (KDP)的 2倍。差热分析结果表明该化合物为非同成分熔融化合物 ,转熔温度约为 983℃ ,可以用助熔剂法进行晶体生长。反射光谱研究表明La2 SrB10 O19的紫外吸收边在 30 0nm左右。

A new mixed borate of lanthanum and strontium with the composition La 2SrB 10 O 19 has been identified in the system of La 2O 3 SrO B 2O 3.La 2SrB 10 O 19 is isostructural with La 2CaB 10 O 19 ,and exhibits a powder second harmonic generation (SHG) effect about twice that of KH 2PO 4(KDP).Differential thermal analysis showed La 2SrB 10 O 19 melts incongruently at about 983℃.It is possible to grow La 2SrB 10 O 19 crystal from suitable flux.The reflection spectrum showed that the cut off wavelength of La 2SrB 10 O 19 is about 300nm.