Pure monoclinic P2₁/c VO₂ thermochromic ceramics are fabricated based on an accessible and simple method using thermal decomposition synthesis in an organic medium. Well-developed submicron crystals with different morphologies are obtained when calcination temperature is varied from 500 to 700 °C. XRD shows that calcination temperature is necessary to form the monoclinic thermochromic phase and to attain high crystallinity. A pure monoclinic VO₂ phase is obtained with our methodology and contrasting with other methods in which mixed vanadium oxide phases appear. Thermodiffraction analysis reveals the structural reversibility of the monoclinic-rutile-monoclinic structure during the phase transition. Additionally, DSC analysis shows the hysteretic thermochromic transition between 60 and 70 °C. Measurements of the optical properties through diffuse reflectance in the visible, and near-infrared ranges and performed as a function of the temperature, exhibit a metal–insulator phase transition in agreement with DSC analysis and thermodiffraction. Our results show that thermal decomposition can be a successful methodology for synthesizing monoclinic VO₂ with high quality, purity, and reproducibility.

基于在有机介质中进行热分解合成的一种简便易行的方法，可以制造出纯单斜晶P2 ₁ / c VO ₂热变色陶瓷。当煅烧温度在500至700°C之间变化时，会获得具有不同形态的成熟的亚微米晶体。XRD显示煅烧温度对于形成单斜热致变色相并获得高结晶度是必需的。纯单斜VO ₂相是通过我们的方法获得的，并且与其他混合钒氧化物相出现的方法形成对比。热衍射分析揭示了在相变过程中单斜晶-金红石-单斜晶结构的结构可逆性。此外，DSC分析显示60到70°C之间的滞后热致变色转变。通过在可见光和近红外范围内的漫反射对光学性能进行测量，并根据温度进行测量，结果表明金属-绝缘体相变与DSC分析和热衍射一致。我们的结果表明，热分解可以成功地合成具有高质量，纯度和重现性的单斜晶VO ₂。