采用一种新的可溶性铌来代替价格昂贵的乙醇铌作为铌源,用溶胶-凝胶法合成铌酸钾(KN)纳米粉体。通过XRD、FTIR和TEM等技术手段对KN超细粉体的成相过程、相结构和微观形貌进行表征。结果表明,干凝胶在600℃煅烧可制得纯正交相的KN纳米粉体,合成温度比固相法降低了200℃以上;该粉体呈棒状,直径大约为100～200nm,长度大约为1～3μm,并对KN纳米棒的合成机制进行探讨。 A new soluble niobium was used instead of the expensive niobium ethoxide as the niobium source, and the potassium niobate (KN) nanopowder was synthesized by the sol-gel method. The phase transformation, phase structure and microstructure of KN superfine powder were characterized by XRD, FTIR and TEM. The results show that pure orthogonally phase KN nanopowders can be prepared by calcination at 600 ℃, and the synthesis temperature is lower than 200 ℃ by the solid state method. The powders are rod-like with a diameter of about 100-200 nm and a length of about 1 ~ 3μm, and the synthesis mechanism of KN nanorods was discussed.