采用Czochralski方法生长了铌酸锶钡晶体(Sr0.62Ba0.38Nb2O6),研究了其铁电及光学性能。通过测量电滞回线,介电常数随温度的变化,得到晶体自发极化强度为0.294 c/m2,轿顽场为72.4 V/mm,居里温度为74℃,其相变属弥散性铁电相变。由透射光谱得出,晶体吸收边位于375 nm,大于500 nm波段的透过率均在60%以上。由椭偏光谱得出,其no和ne均随着波长增大而减小,波长632.8 nm处的值分别为2.288和2.261。no大于ne,是负单轴晶体。 The barium strontium niobate crystal (Sr0.62Ba0.38Nb2O6) was grown by the Czochralski method and its ferroelectric and optical properties were studied. By measuring the hysteresis loop, the dielectric constant changes with the temperature, the spontaneous polarization of the crystal is 0.294 c / m2, the semitrailer is 72.4 V / mm and the Curie temperature is 74 ℃. The phase transition is a diffusible iron Electric phase change. From the transmission spectra, the absorption edge of the crystal is located at 375 nm, and the transmittance of more than 500 nm band is above 60%. From ellipsometry, no and ne both decrease with increasing wavelength, and the values ​​at 632.8 nm are 2.288 and 2.261, respectively. no greater than ne, is a negative uniaxial crystal.