【摘要】 本文采用显微光学法成功地研究了 BiVO₄ 晶体的铁弹转变。研究结果指出:铁弹转变的温度范围,升温时为 220～260℃,降温时为220～190℃,转变中的热滞后约为30℃。当施加机械应力为60～100kg/cm²时,可观察到晶体内畴壁的移动。 文中结果与Pinczuk的拉曼光谱分析和Bierlein的差热分析作了比较,并指出了他们工作中的不足之处。更多还原

【Abstract】 The studies of ferroelastic in BiVO₄ crystal have been successfully carried out by micro-optical method.As is seen from the experimental results, the temperature of the ferroelastictransition is ranged from 220℃ to 260℃ and from 220℃ to 190℃ in heating and cooling processrespectively, with temperature hysteresis of about 30℃. When a mechanical stress of 60～100kg·cm^-2 is applied to the crystal, the motion of the domain-wall can be observed. The results obtained by micro-optical method are compared with those by Raman spec-trometry and differential thermal analysis method by Pinczuk and Bierlein respectively andsome short comings are found in their work.更多还原