通过Nb2O5·nH2O凝胶和不同的钾源(KNO3或者K2CO3)在简单直接反应下可制得具有不同晶相组成和结晶形貌的铌酸钾(KNbO3,以下简写为KN)陶瓷粉体.当采用KNO3时,产物为长度10～20 μm、宽度2～4 μm的正交晶相KNbO3(O-KN)微米片;在其它条件相同的情况下,如以K2CO3替代KNO3作为钾源,只能得到团聚的、微观形貌不规则的菱方晶相KNbO3(R-KN)陶瓷粉体.XRD和SEM分析表征发现,在反应过程中出现的层状中间产物K4Nb6O17直接导致了不常见的O-KN微米片结晶;模板化的结晶过程可以在无任何有机添加剂的条件下实现.
参考文献
| [1] | Reeves R J;Jani M G;Jassemnejad B et al.Phetorefractiive properties of KNbO3[J].Physical Review B:Condensed Matter,1991,43:71-82. |
| [2] | Zgonik M;Schiesser R;Biaggio I et al.Meterials constants of KNbO3 relevant for electro-and acousto-optics[J].Journal of Applied Physics,1993,74:1287-1297. |
| [3] | Zgonik M;Nakagawa K;Gunter P et al.Electro-optic and dielectric properties of photowfractive BaTiO3 and KNbO3[J].Journal of the Optical Society of America B:Optical Crystal Physics,1995,12:1416-1421. |
| [4] | Gunter P .Electro-optical properties of KNbO3[J].Optics Communications,1974,11:285-290. |
| [5] | Uematsu Y .Nonlinear optical properties of KNbO3 single crystal in the orthorhombic phase[J].Japanese Journal of Applied Physics,1974,14:1362-1368. |
| [6] | Gunter P;Micheron F .Photorefractive effeets and photecurrents in KNbO3:Fe[J].Ferroelectrics,1978,18:27-38. |
| [7] | Saito Y;Takao H;Tani T et al.Lead-free piesocommics[J].NATURE,2004,432:84-87. |
| [8] | Kimura T;YoshimotoT;Iida N et al.Mechanism of grain orientetion during hot-pressing of bismuth titanate[J].Journal of the American Ceramic Society,1989,72:85-89. |
| [9] | Kimura T;Holms M H;Newnham R E .Fabrication of grain-oriented Bi2WO6 ceramics[J].Journal of the American Ceramic Society,1982,65:223-226. |
| [10] | Nazeri E A;Kuang A X;Mackenzie J D .Prepamtion and properties of KNbO3 via the sol-gel method[J].Journal of Materials Science,1990,25:3333-3337. |
| [11] | Amini M M;Sacks M D .Synthesis of petassium niobate from metal alkoxides[J].Journal of the American Ceramic Society,1991,74:53-59. |
| [12] | Cheng Z X;Ozawa K;Miyazaki A et al.Potassium niabete derived from a novel chemical solution[J].Journal of Crystal Growth,2005,275:971-975. |
| [13] | Jim-Feng Liu;Xiao-Lin Li;Ya-Dong Li .Synthesis and characterization of nanocrystalline niobates[J].Journal of Crystal Growth,2003(3/4):419-424. |
| [14] | Liu J F;Li X L;Li Y D .Novel synthesis of polymorphous nanocrystalline KNbO3 by a low temperature solution method[J].Journal of Nanoscience and Nanotechnology,2002,2:617-619. |
| [15] | Lu C H;Lo S Y;Wang L .Glycothermal preparation of potassium niobate ceremic particles under supetecrifical conditions[J].Materials Letters,2002,55:121-125. |
| [16] | Pribosic, I;Makovec, D;Drofenik, M .Formation of nanoneedles and nanoplatelets of KNbO3 perovskite during templated crystallization of the precursor gel[J].Chemistry of Materials,2005(11):2953-2958. |
| [17] | Li Z;Liu R;Xie Y et al.A Novel Method for Preparation of Doped Ba3(Ca1.18 Nb1.82)O9-δ:application to Ammonia synthesis at atmoaphere pressure[J].Solid State Ionics,2005,176:1063-1066. |
| [18] | Meinan Liu;Dongfeng Xue;Chao Luo .Facile Synthesis of Lithium Niobate Squares by a Combustion Route[J].Journal of the American Ceramic Society,2006(5):1551-1556. |
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