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基于平面构型的阴离子基团可能具有大的倍频效应的观点,以固相反应法在LiBO_2:CdCO_3=1∶1摩尔比,反应温度600～620℃,空气气氛中合成了α-LiCdBO_3。α-LiCdBO_3在高于620℃时开始转变成β-LiCdBO_3。此β-多型体在867±5℃异元熔融而分解。考查了α-LiCdBO_3的合成条件及其粉末倍频效应,测得α-LiCdBO_3的SHG(Second harmonic generation)强度是ADP(NH_4H_2PO_4)的三倍,β-LiCdBO_3无倍频效应。
The α-LiCdBO_3 was synthesized in air atmosphere by the solid-state reaction method at the molar ratio of LiBO_2: CdCO_3 = 1: 1 and the reaction temperature of 600 ~ 620 ℃, based on the fact that the anionic group in the plane configuration may have a large frequency doubling effect. α-LiCdBO_3 begins to transform to β-LiCdBO_3 above 620 ℃. This β-polytype dissociates by dissimilar melting at 867 ± 5 ° C. The synthesis conditions of α-LiCdBO_3 and its frequency doubling effect were investigated. The second harmonic generation (SHG) of α-LiCdBO_3 was three times higher than that of ADP (NH_4H_2PO_4) and no doubling effect of β-LiCdBO_3.