Ecological inorganic blue pigments Sr_1-xRE_xCuSi₄O_10+δ (RE = Pr, Nd, Sm, x ranges from 0 to 0.5) with high near-infrared reflectance were synthesized via sol-gel method. The pigments were characterized with scanning electron microscopy, UV-vis-NIR diffuse reflectance spectroscopy and the Commission Internationale de l’Eclairage 1976 L*a*b* colorimetric method. After annealed at 900 °C, the SrCuSi₄O₁₀ pigment samples exhibited near-infrared solar reflectance of 62.64% and relative intense blue color. The near-infrared reflectance spectra of different rare earth ions doped SrCuSi₄O₁₀ pigments presented various fluctuations due to the configurational electric dipole transitions. The incorporation of rare earth ions can promote the near-infrared reflectance and solar reflectance of SrCuSi₄O₁₀ pigments. When the adding amount of Pr, Nd and Sm, was 20%, 40% and 10%, the near-infrared solar reflectance of SrCuSi₄O₁₀ pigments reached the optimal value of 72.00%, 68.54%, 68.67%, respectively, which are expected to be promising candidates as environmentally benign cool blue pigments.

通过溶胶-凝胶法合成了具有高近红外反射率的生态无机蓝色颜料Sr _{1- x} RE _x CuSi ₄ O _{10 +δ}（RE = Pr，Nd，Sm，x范围为0至0.5）。通过扫描电子显微镜，紫外可见近红外漫反射光谱和国际照明委员会1976 L * a * b *比色法对颜料进行了表征。在900°C退火后，SrCuSi ₄ O ₁₀颜料样品显示出62.64％的近红外太阳反射率和相对强烈的蓝色。不同稀土离子掺杂SrCuSi ₄ O ₁₀的近红外反射光谱由于构型电偶极跃迁，颜料呈现出各种波动。稀土离子的掺入可以促进SrCuSi ₄ O ₁₀颜料的近红外反射率和太阳反射率。当Pr，Nd和Sm的添加量分别为20％，40％和10％时，SrCuSi ₄ O ₁₀颜料的近红外太阳反射率分别达到最佳值72.00％，68.54％，68.67％。有望作为对环境有益的凉爽蓝色颜料成为有前途的候选人。