Production of a stable and homogeneous colloid dispersion of nano CoAl2O4 pigment for ceramic ink-jet ink

Peymannia, Masoud; Soleimani‐Gorgani, Atasheh; Ghahari, Mehdi; Najafi, Farhood

doi:10.1016/j.jeurceramsoc.2014.03.022

Cited by 51 publications

(20 citation statements)

References 26 publications

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“…This result was agreed with the Uv-Vis absorption spectra of the TiO 2 @CoAl 2 O 4 complex pigments. When the CoAl 2 O 4 /TiO 2 mass ratio was 0.4, the blue component of the complex pigments was up to 27.97, which was less intense than that of the pure CoAl 2 O 4 pigments (31.17) 48 and Co 0.5 Zn 0.5 Al 2 O 4 (36.24) pigments. 16 However, the cobalt content of the complex pigments was only 9.52%, which was below of the pure CoAl 2 O 4 pigments and 50 whereas the cobalt content was far less than both later.…”

Section: Resultsmentioning

confidence: 93%

Synthesis and color properties of the TiO₂@CoAl₂O₄ blue pigments with low cobalt content applied in ceramic glaze

Wang

Liu

et al. 2018

J Am Ceram Soc

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The TiO2@CoAl2O4 complex blue pigments with low cobalt content were synthesized through calcinations of the precursor obtained from coprecipitating Co2+ and Al3+ to form Co‐Al LDHs (layered double hydroxides) on the surface of TiO2 particles. The structure and the properties of the synthesized pigments were characterized by XRD, SEM, TEM, UV‐Vis spectroscopy, XPS, and colorimeter. The precursors of the blue TiO2@CoAl2O4 complex pigments were consisted of LDHs shell layer encapsulated TiO2 microsphere. After calcinations at 1100°C, the LDHs shell layer were absolutely transformed to the spinel CoAl2O4, and the pigments presented a core‐shell structure and uniform sphere morphology (the diameter of microsphere was about 780 nm). The absorption bands at around 547, 584, and 624 nm in the Uv‐Vis absorption spectra of the TiO2@CoAl2O4 complex pigments were corresponded to the characteristic absorption bands of the spinel CoAl2O4, revealed the pigments with a bright blue hue. In addition, as the mass ratio of CoAl2O4/TiO2 increased to 0.4, the blue component of the pigments reached to 27.89 and slight color variation with the increase in the CoAl2O4 content in a range, possessed low cobalt content and exhibited a stabile performance in commercial low‐temperature ceramic glazes. The XGT results showed that the TiO2@CoAl2O4 complex pigments with low cobalt content presented bright color in ceramic glaze. Especially, the synthesized pigments reduced the usage and toxicity of cobalt, which were efficiency for economy and environmental protection.

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Section: Resultsmentioning

confidence: 93%

Synthesis and color properties of the TiO₂@CoAl₂O₄ blue pigments with low cobalt content applied in ceramic glaze

Wang

Liu

et al. 2018

J Am Ceram Soc

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“…A high viscosity could lead to an insufficient jet of ink, whereas a significantly small viscosity could degrade inner resistance of the ink, which makes the ink drop crescent shaped, resulting in damped oscillation. [2,33] The viscosity of prepared blue glass ink was measured to be 28.45 mPa•s at room temperature, which allowed the glass ink to be printed well when flowing through the nozzles of the printer head and forming drops with proper physics and fluid mechanics performance during the printing process. [34,35]…”

Section: Glass Ink 31 Viscosity Of the Prepared Glass Inkmentioning

confidence: 99%

Preparation and characterization of a stable nano-sized Zn x Co1–x Al2O4 ink for glass decoration by ink-jet printing

et al. 2017

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：A stable inorganic glass ink was prepared by mechanically grinding a mixture of a blue pigment (CoAl 2 O 4) and low-melting-point glass powders in a specific organic solvent, which possesses a lower annealing temperature compared with ceramic ink. The CoAl 2 O 4 was synthesized by solid-state reaction and the best sintering temperature should be at 1300 ºC or above according to the observation of XRD. CoAl 2 O 4 shows blue color both in a powder form and coating. The average particle size of pigments and glass powders mixture decreases with the increase of glass powders and milling time. SEM cross-sectional

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“…Cobalt blue consists mainly of cobalt aluminate, and is a chemically and thermally stable solid pigment. Various methods have been reported for the synthesis of cobalt aluminate, for example, solid‐state reactions, combustion methods, sol‐gel methods,, and coprecipitation methods . However, cobalt is scarce and expensive, therefore the production costs of cobalt‐based ceramic pigments are high.…”

Section: Introductionmentioning

confidence: 99%

Solid‐state synthesis and characterization of cobalt blue core‐shell pigment particles

et al. 2018

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Cobalt blue is one of the most chemically and thermally stable blue pigments. However, cobalt is scarce and expensive. To minimize the use of cobalt and reduce production costs and toxicity, cobalt blue core‐shell pigments were synthesized by a solid‐state method, which is cheaper than a liquid‐phase reaction. Small cobalt hydroxide particles and large α‐alumina particles, in various ratios, were used as the starting materials. The dry mixed powders were calcined at 1200°C for 2 hours. Elemental mappings of the surfaces and cross sections of the synthesized particles showed that the cobalt blue had a core‐shell structure. X‐ray diffraction patterns showed that the synthesized cobalt blue consisted of an α‐alumina core and a cobalt aluminate shell. The color tone of the synthesized cobalt blue was evaluated from the lightness (L*) and chroma (C*) values. The color tone of the cobalt blue synthesized in this study was almost same as those of commercially available samples although the cobalt molar fraction was lower than the stoichiometric ratio (Co/(Co + Al) = 0.33, Co/Al = 0.5) which was calculated from the chemical reaction formula.

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Production of a stable and homogeneous colloid dispersion of nano CoAl2O4 pigment for ceramic ink-jet ink

Cited by 51 publications

References 26 publications

Synthesis and color properties of the TiO₂@CoAl₂O₄ blue pigments with low cobalt content applied in ceramic glaze

Synthesis and color properties of the TiO₂@CoAl₂O₄ blue pigments with low cobalt content applied in ceramic glaze

Preparation and characterization of a stable nano-sized Zn x Co1–x Al2O4 ink for glass decoration by ink-jet printing

Solid‐state synthesis and characterization of cobalt blue core‐shell pigment particles

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Production of a stable and homogeneous colloid dispersion of nano CoAl2O4 pigment for ceramic ink-jet ink

Cited by 51 publications

References 26 publications

Synthesis and color properties of the TiO2@CoAl2O4 blue pigments with low cobalt content applied in ceramic glaze

Synthesis and color properties of the TiO2@CoAl2O4 blue pigments with low cobalt content applied in ceramic glaze

Preparation and characterization of a stable nano-sized Zn x Co1–x Al2O4 ink for glass decoration by ink-jet printing

Solid‐state synthesis and characterization of cobalt blue core‐shell pigment particles

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Synthesis and color properties of the TiO₂@CoAl₂O₄ blue pigments with low cobalt content applied in ceramic glaze

Synthesis and color properties of the TiO₂@CoAl₂O₄ blue pigments with low cobalt content applied in ceramic glaze