CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Meiqi Zhang,Yijie Yang,Luo Feng,Xiaoqi Sun
Near infrared reflective inorganic pigment YIn 1-x-y Mn y Fe x O 3 (x/y = 0.1–0.5) was prepared by solid state reaction. The X-ray diffraction analysis and CIE1976 L*a*b* colorimetric analysis reveal that the main phase of the sample is changed from YInO 3 phase to YFeO 3 phase and the color of the sample is changed from blue to black (x ≥ 0.4) with the increase of iron content. The brightness value of black pigment ranges from 23.27 to 32.12. When In 3+ is replaced by Fe 3+ and Mn 3+ , the band gap of the black sample is decreased from 1.73eV to 1.39eV. The near-infrared reflectance (R) and near-infrared solar reflectance (R*) of the sample reach the maximum when x = 0.4 and y = 0.1, which are 77.82% and 53.44%, respectively. YIn 1-x-y Mn y Fe x O 3 (x = 0.4–0.5, y = 0.1–0.5) black samples have higher near infrared reflectivity than common commercial black pigments. In the thermal insulation study, under the condition of infrared irradiation for 90 min, the internal air temperature difference between the iron car model coated with YIn 0.5 Mn 0.1 Fe 0.4 O 3 pigment and the iron car model coated with commercial iron black pigment can reach 7 °C. YIn 0.5 Mn 0.1 Fe 0.4 O 3 black pigment was soaked in 5% acid-alkali solution for 24 h, the chromaticity was almost unchanged before and after immersion, indicating that the sample has good chemical stability. The above properties show the potential of synthetic black pigments in the field of energy conservation.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jian He,Feng Jiang,Sihan Yang,Longjiao Chang,Bin Wang,Xuejiao Wang
Currently black pigments face challenges of non-ideal luminance factor (L-value), and the presence of potentially hazardous cobalt (Co). A novel stable Na 2 NiMn 2 O 6 (NNMO) black pigment is reported in this work. The pigment exhibits excellent properties, including an ideal low L-value, Co-free composition, and stable bright black hue. A range of analytical techniques are employed to evaluate the properties of the novel pigment, including XRD, SEM, EDS-Mapping, XPS, UV–V is , and CIELAB colorimetry. The chromaticity parameters of the black pigment are L∗ = 24.39, a∗ = 0.21, and b∗ = 0.39. The bright black color of the pigment and the glazing sample was attributed to the combined contributions of Ni 2+ and Mn 3+ /Mn 4+ in the Na 2 NiMn 2 O 6 pigment and NiMnO 3 , Na 4 Mn 9 O 18 , Mn 2 O 3 ingredients in the glazing sample. This research offering valuable guidance for the development of novel, Co-free, and low L-value black pigment.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kai Lv,Xu Liang,Liangmiao Zhang,Zongtao Zhang,Yanfeng Gao
Solar thermal energy regulation is important for sustainable development, comfortable housing, and living. Black compounds are usually considered as an absorber of solar heat. This work reports a series of black near-infrared reflective pigments, Ca 2-y Mg y Mn(1) 1-x Mn(2) x O 4 (x = 0–1, y = 0–0.5), which show strong near-infrared (NIR) reflectivity. Comprehensive analyses were carried out to characterize the obtained pigments including X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and UV–Vis–NIR spectrophotometry. Through the substitution of MnO 2 with Mn 2 O 3 , NIR solar reflectance of the black pigment can be enhanced by 13%, which might be mainly attributed to differences in particle size and lattice parameters. Meanwhile, through Mg doping, the obtained pigment Ca 1.8 Mg 0.2 MnO 4 shows excellent color performances (L* = 43, a* = 0.36, b* = −0.37) and NIR solar reflectance (R*, ∼60%). EnergyPlus simulation results show that for a warm city (Haikou), using the Ca 1.8 Mg 0.2 MnO 4 coating (L* = 25, R* = 51%) can reduce annual cooling energy consumption by 21%.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhendong Huang,Yan Shan,Cun Liu,Kezheng Chen,Xuegang Yu
Near-infrared (NIR) reflective pigments have attracted increasing attention in environmental research due to their potential to reduce building energy consumption. In this study, Zn-doped Ca 2 MnO 4 black pigments were synthesized to enhance both NIR reflectance and color performance. The effects of Zn doping on the crystal structure and optical properties were systematically investigated using X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and UV-Vis-NIR diffuse reflectance spectroscopy. The optimal composition, Ca 2 Mn 0.96 Zn 0.04 O 4 , exhibited excellent optical characteristics (L*= 40.43, a* = 0.53, b* = 0.10) and a high NIR solar reflectance of approximately 66%. Compared to conventional dark high-reflectance pigments (e.g., Black-10G996), the Zn-doped sample showed significantly improved NIR reflectance (△R* ≥ 20%) and enhanced chromatic properties. The NIR reflectance enhancement was attributed to an increased concentration of oxygen vacancy introduced by Zn doping. Furthermore, thermal simulation experiments under xenon lamp irradiation demonstrated that a model room using Ca 2 Mn 0.96 Zn 0.04 O 4 as the roofing material maintained a temperature 6.5 °C lower than one using a commercial pigment, indicating superior thermal management capability. In addition, the Zn-doped pigments exhibited lower toxicity, offering an environmentally friendly alternative to traditional black pigments.
研究领域:
材料科学
·
无机化学
·
功能材料
·
环境科学
·
能源材料
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）