A copper-red and silver-white metallic glaze of R_(2)O-RO-Al_(2)O_(3)-SiO_(2)-P_(2)O_(5)system was synthesized by adjusting the firing temperature and glaze components.The coloration mechanism of the metallic glaze wa...A copper-red and silver-white metallic glaze of R_(2)O-RO-Al_(2)O_(3)-SiO_(2)-P_(2)O_(5)system was synthesized by adjusting the firing temperature and glaze components.The coloration mechanism of the metallic glaze was revealed via investigation of the microstructure of the glaze.Our research reveals that the metallic glaze with different colors is mainly due to the amount of Fe_(2)O_(3).The metallic glaze shows a silver-white luster due to a structural color ofα-Fe_(2)O_(3)crystals with a good orientation when the sample contains 0.0939 mol of Fe_(2)O_(3),maintaining temperatures at 1150℃for 0.5 h.The metallic glaze is copper-red which is dominated by the coupling of chemical and structural color ofα-Fe_(2)O_(3)crystals when the sample contains 0.0783 mol of Fe_(2)O_(3).After testing the amount of SiO_(2),we find that 4.0499 mol is the optimal amount to form the ceramic network,and 0.27 mol AlPO_(4)is the best amount to promote phase separation.展开更多
This paper mainly discusses the Si/Al molar ratio, RO/R2O molar ratio, Fe content, glazing and firing system on the thickness of Longquan Celadon pink coloring effects, and using a colorimeter, field emission scanning...This paper mainly discusses the Si/Al molar ratio, RO/R2O molar ratio, Fe content, glazing and firing system on the thickness of Longquan Celadon pink coloring effects, and using a colorimeter, field emission scanning electron microscopy were used to analyze better experimental sample microstructure and color and so on. We explored the Longquan Celadon of pink coloration mechanism.展开更多
This paper mainly discusses the Si/A1 molar ratio, RO/R20 molar ratio, Fe content, glazing and firing system on the thickness of Longquan Celadon pink coloring effects, and using a colorimeter, field emission scanning...This paper mainly discusses the Si/A1 molar ratio, RO/R20 molar ratio, Fe content, glazing and firing system on the thickness of Longquan Celadon pink coloring effects, and using a colorimeter, field emission scanning electron microscopy were used to analyze better experimental sample microstructure and color and so on. We explored the Longquan Celadon of pink coloration mechanism.展开更多
The red ceramic pigment is widely used in industrial production, but the pigments with pure color and bright red performance are rare. Therefore, it is important to study and develop new red ceramic pigment with perfe...The red ceramic pigment is widely used in industrial production, but the pigments with pure color and bright red performance are rare. Therefore, it is important to study and develop new red ceramic pigment with perfect color performance. This paper reports the preparation of Cr-doped YAlO_3 red ceramic pigment rendering by sol-gel method with high temperature resistance, good color and proposed color mechanism. The prepared samples were characterized by XRD, SEM, EDS and UV-vis, and the effects of Cr on the crystal structure, color rendering properties and color mechanism were discussed. The results showed that the optimum concentration of coloring agent（Cr） in Cr：YAlO_3 red ceramic pigment was 3 at.%. The main color mechanism was also discussed. Compared with the solid phase sintering and precipitation methods for the synthesis of red ceramic pigment, the sol-gel method possessed obvious advantages, such as perfect mixing of the raw materials, uniform dispersion of doping ions and the pure color.展开更多
The color profile of the food is an essential aspect in determining consumer acceptance.There are essential pigments that define the food color,including chlorophylls(green color),anthocyanins(red-purple color),betala...The color profile of the food is an essential aspect in determining consumer acceptance.There are essential pigments that define the food color,including chlorophylls(green color),anthocyanins(red-purple color),betalains(red color),and carotenoids(yellow-orange color).The color pigments are affected by temperature,oxygen,light,and pH.Thus,the deterioration of coloring pigments during processing is essential to prevent it.Traditional methods could affect food quality,especially the physiochemical and color properties,which may reduce the consumer’s acceptability.Therefore,cold plasma(CP)has been employed as a novel food processing method to preserve food’s optical properties.Although common trends are noticed in all foods,the effectiveness of CP processing parameters varies based on the characteristics of foods,such as the nature of the food used for CP processing.Therefore,CP applications for processing various foods are essential for optimizing parameters for producing high-quality food.This review provides a comprehensive assessment and discussion on CP processing,its action mechanism,and other factors in preserving food color.Furthermore,it is recommended that the correlation between color and pigment retention needs to be further explored,which remains a challenging issue.展开更多
Photochromic luminescent phosphors have attracted considerable attention owing to their excellent optical properties,but they face the problem of limited application.Herein,the reversible photochromic and photo-/therm...Photochromic luminescent phosphors have attracted considerable attention owing to their excellent optical properties,but they face the problem of limited application.Herein,the reversible photochromic and photo-/thermal bleaching phenomena of a BiNbO_(4)ceramic are reported,exhibiting a color change between ivory and grey upon alternating stimuli between 365/405 nm light illumination and 808 nm laser irradiation(or thermal treatment at 400℃).Their potential coloration mechanisms are explained by the color center model,providing a comprehensive framework for understanding the original processes.Through Er^(3+)ion doping,the maximum coloration contrast decreases from 24%to 20%,while simultaneously enabling the observation of bright green upconversion luminescence.Relying on the combination of re-absorption and energy transfer processes,the upconversion luminescence intensity of the Er^(3+)ions can be effectively modulated,respectively,showing maximum regulation and recovery rates of 88.0%and 98.1%.The cycle measurements demonstrate the excellent anti-fatigue properties and reproducibility of BiNbO_(4):Er^(3+)ceramics,confirming their potential dual-functional applications in anti-counterfeiting and fingerprint acquisition.展开更多
基金Funded by the National Natural Science Foundation of China(No.52202231)the College Students Innovation and Entrepreneurship Training Program of Hubei University of Technology(No.202310500039)。
文摘A copper-red and silver-white metallic glaze of R_(2)O-RO-Al_(2)O_(3)-SiO_(2)-P_(2)O_(5)system was synthesized by adjusting the firing temperature and glaze components.The coloration mechanism of the metallic glaze was revealed via investigation of the microstructure of the glaze.Our research reveals that the metallic glaze with different colors is mainly due to the amount of Fe_(2)O_(3).The metallic glaze shows a silver-white luster due to a structural color ofα-Fe_(2)O_(3)crystals with a good orientation when the sample contains 0.0939 mol of Fe_(2)O_(3),maintaining temperatures at 1150℃for 0.5 h.The metallic glaze is copper-red which is dominated by the coupling of chemical and structural color ofα-Fe_(2)O_(3)crystals when the sample contains 0.0783 mol of Fe_(2)O_(3).After testing the amount of SiO_(2),we find that 4.0499 mol is the optimal amount to form the ceramic network,and 0.27 mol AlPO_(4)is the best amount to promote phase separation.
文摘This paper mainly discusses the Si/Al molar ratio, RO/R2O molar ratio, Fe content, glazing and firing system on the thickness of Longquan Celadon pink coloring effects, and using a colorimeter, field emission scanning electron microscopy were used to analyze better experimental sample microstructure and color and so on. We explored the Longquan Celadon of pink coloration mechanism.
文摘This paper mainly discusses the Si/A1 molar ratio, RO/R20 molar ratio, Fe content, glazing and firing system on the thickness of Longquan Celadon pink coloring effects, and using a colorimeter, field emission scanning electron microscopy were used to analyze better experimental sample microstructure and color and so on. We explored the Longquan Celadon of pink coloration mechanism.
文摘The red ceramic pigment is widely used in industrial production, but the pigments with pure color and bright red performance are rare. Therefore, it is important to study and develop new red ceramic pigment with perfect color performance. This paper reports the preparation of Cr-doped YAlO_3 red ceramic pigment rendering by sol-gel method with high temperature resistance, good color and proposed color mechanism. The prepared samples were characterized by XRD, SEM, EDS and UV-vis, and the effects of Cr on the crystal structure, color rendering properties and color mechanism were discussed. The results showed that the optimum concentration of coloring agent（Cr） in Cr：YAlO_3 red ceramic pigment was 3 at.%. The main color mechanism was also discussed. Compared with the solid phase sintering and precipitation methods for the synthesis of red ceramic pigment, the sol-gel method possessed obvious advantages, such as perfect mixing of the raw materials, uniform dispersion of doping ions and the pure color.
基金support of Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing,Foshan University,Foshan 528225,China(Project ID:2022B1212010015).
文摘The color profile of the food is an essential aspect in determining consumer acceptance.There are essential pigments that define the food color,including chlorophylls(green color),anthocyanins(red-purple color),betalains(red color),and carotenoids(yellow-orange color).The color pigments are affected by temperature,oxygen,light,and pH.Thus,the deterioration of coloring pigments during processing is essential to prevent it.Traditional methods could affect food quality,especially the physiochemical and color properties,which may reduce the consumer’s acceptability.Therefore,cold plasma(CP)has been employed as a novel food processing method to preserve food’s optical properties.Although common trends are noticed in all foods,the effectiveness of CP processing parameters varies based on the characteristics of foods,such as the nature of the food used for CP processing.Therefore,CP applications for processing various foods are essential for optimizing parameters for producing high-quality food.This review provides a comprehensive assessment and discussion on CP processing,its action mechanism,and other factors in preserving food color.Furthermore,it is recommended that the correlation between color and pigment retention needs to be further explored,which remains a challenging issue.
基金supported by grants from the National Natural Science Foundation of China-Yunnan Joint Fund(U2102215)the National Natural Science Foundation of High-end Foreign Experts Introduction Plan(G2022039008L)+1 种基金the Academician Expert Workstation of Cherkasova Tatiana in Yunnan Province(202305AF150099)the Yunnan Province Major Science and Technology Special Plan(202302AB080005).
文摘Photochromic luminescent phosphors have attracted considerable attention owing to their excellent optical properties,but they face the problem of limited application.Herein,the reversible photochromic and photo-/thermal bleaching phenomena of a BiNbO_(4)ceramic are reported,exhibiting a color change between ivory and grey upon alternating stimuli between 365/405 nm light illumination and 808 nm laser irradiation(or thermal treatment at 400℃).Their potential coloration mechanisms are explained by the color center model,providing a comprehensive framework for understanding the original processes.Through Er^(3+)ion doping,the maximum coloration contrast decreases from 24%to 20%,while simultaneously enabling the observation of bright green upconversion luminescence.Relying on the combination of re-absorption and energy transfer processes,the upconversion luminescence intensity of the Er^(3+)ions can be effectively modulated,respectively,showing maximum regulation and recovery rates of 88.0%and 98.1%.The cycle measurements demonstrate the excellent anti-fatigue properties and reproducibility of BiNbO_(4):Er^(3+)ceramics,confirming their potential dual-functional applications in anti-counterfeiting and fingerprint acquisition.
