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采用溶胶–凝胶法制备了CuCr1–xMgxO2粉末,压制烧结形成了CuCr1–xMgxO2陶瓷样品,研究了Mg2+掺杂量和压制压强对CuCrO2粉末和陶瓷的相组成、显微结构及光电性能的影响。结果表明:随着Mg2+掺杂量从0.01增加到0.07,所制CuCr1–xMgxO2粉末对紫外–可见光的吸收度增加,光学带隙宽度由3.25 eV逐渐减小到2.86 eV。随着Mg2+掺杂量或压制压强的增加,其相应陶瓷样品的电导率均先增大后减小。当Mg掺杂量x为0.03,压制压强为550 MPa时,制备的CuCr0.97Mg0.03O2陶瓷样品的电导率达到最大值,为19.8 S/cm。
The CuCr1-xMgxO2 powders were prepared by sol-gel method and pressed into CuCr1-xMgxO2 ceramics samples. The effects of Mg2 + doping amount and pressing pressure on the phase composition, microstructure and optical properties of CuCrO2 powders and ceramics were investigated. The results show that as the Mg2 + content increases from 0.01 to 0.07, the absorption of CuCr1-xMgxO2 powders increases the UV-Vis absorption and the optical band gap width decreases from 3.25 eV to 2.86 eV. With the increase of Mg2 + doping amount or pressing pressure, the electrical conductivity of the corresponding ceramic samples first increases and then decreases. When Mg doping amount x is 0.03 and pressing pressure is 550 MPa, the conductivity of CuCr0.97Mg0.03O2 ceramic sample reaches 19.8 S / cm.