As novel dark red pigment,sodium manganese phosphate,NaMnPO4,imitated with Natrophilite,was synthesized by heating at various conditions.The heating temperature and time,volume of water,phosphorus resource were studie...As novel dark red pigment,sodium manganese phosphate,NaMnPO4,imitated with Natrophilite,was synthesized by heating at various conditions.The heating temperature and time,volume of water,phosphorus resource were studied in this process.The obtained powders were estimated with X-ray diffraction(XRD),Infrared(IR)spectra,ultraviolet-visible(UV-Vis)reflectance spectra,and L^*a^*b^*color space.Further,similar chemical compositions with NaMnPO4 were also studied in the same method.The obtained samples had weak peaks of NaMnPO4 in XRD patterns.Sample synthesized in Na/Mn=1/1 at 700℃for 6 hours indicated high redness,a^*value.展开更多
Novel phosphate pigments imitated with Scorzalite,FeAl2(PO4)2(OH)2,were prepared from iron and aluminum nitrate solutions,ascorbic acid,and phosphoric acid with pH adjustments(pH 5,7,9).The obtained precipitates were ...Novel phosphate pigments imitated with Scorzalite,FeAl2(PO4)2(OH)2,were prepared from iron and aluminum nitrate solutions,ascorbic acid,and phosphoric acid with pH adjustments(pH 5,7,9).The obtained precipitates were heated at 300,500,and 700°C for 1 h.The precipitates and their thermal products were estimated with X-ray diffraction(XRD),Infrared(IR)spectra,ultraviolet-visible(UV-Vis)reflectance spectra,and L*a*b*color space.The precipitated sample was not clearly colored,but it turned orange to red when heated.Samples prepared at low pH showed higher whiteness than samples prepared at high pH.The theoretical amount of ascorbic acid was sufficient to completely reduce iron during the adjustment.This study showed the possibility of novel inorganic phosphate red pigment.展开更多
文摘As novel dark red pigment,sodium manganese phosphate,NaMnPO4,imitated with Natrophilite,was synthesized by heating at various conditions.The heating temperature and time,volume of water,phosphorus resource were studied in this process.The obtained powders were estimated with X-ray diffraction(XRD),Infrared(IR)spectra,ultraviolet-visible(UV-Vis)reflectance spectra,and L^*a^*b^*color space.Further,similar chemical compositions with NaMnPO4 were also studied in the same method.The obtained samples had weak peaks of NaMnPO4 in XRD patterns.Sample synthesized in Na/Mn=1/1 at 700℃for 6 hours indicated high redness,a^*value.
文摘Novel phosphate pigments imitated with Scorzalite,FeAl2(PO4)2(OH)2,were prepared from iron and aluminum nitrate solutions,ascorbic acid,and phosphoric acid with pH adjustments(pH 5,7,9).The obtained precipitates were heated at 300,500,and 700°C for 1 h.The precipitates and their thermal products were estimated with X-ray diffraction(XRD),Infrared(IR)spectra,ultraviolet-visible(UV-Vis)reflectance spectra,and L*a*b*color space.The precipitated sample was not clearly colored,but it turned orange to red when heated.Samples prepared at low pH showed higher whiteness than samples prepared at high pH.The theoretical amount of ascorbic acid was sufficient to completely reduce iron during the adjustment.This study showed the possibility of novel inorganic phosphate red pigment.
