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Article
Publication date: 8 December 2020

Aleksandr Viktorovich Zaichuk, Aleksandra Andreevna Amelina, Yurii Sergeevich Hordieiev, Liliya Frolova and Viktoriia Dmitrievna Ivchenko

The purpose of this paper is to conduct the directed synthesis of blue-colour aluminate spinel pigments based on spent aluminium–cobalt–molybdenum (ACM) catalyst and to…

Abstract

Purpose

The purpose of this paper is to conduct the directed synthesis of blue-colour aluminate spinel pigments based on spent aluminium–cobalt–molybdenum (ACM) catalyst and to study peculiar features of mineral formation processes and changes in their colour indices depending on composition and firing temperature.

Design/methodology/approach

Aluminate spinel ceramic pigments with specified colour indices were synthesised by directed formation of their mineral composition and identification of the most rational technological parameters of production. Mineral composition of synthesised pigments was evaluated by X-ray phase analysis. The colour indices of pigments and pigment-containing glaze coatings were studied on the comparator colour. The chemical resistance of pigments was determined by loss of their weight loss after boiling in 1 N hydrochloric acid solution and 1 N sodium hydroxide solution.

Findings

Peculiar features of formation of the mineral composition of aluminate spinel pigments based on the ACM catalyst were studied. The expediency of using magnesium and zinc oxides in their composition has been proved. It is found that for the formation of stable pigments of intense blue colour, a concentration of cobalt (II) oxide in the amount of 0.5 mol is sufficient, which is 23.1 Wt.%. The colour of such pigments is determined by the ratios of cobalt, magnesium and zinc aluminates, which form a spinel solid solution.

Practical implications

The use of developed aluminate spinel pigments provides obtaining of high-quality glass coatings of blue colour, in particular, for ceramics.

Originality/value

Aluminium oxide in the spent ACM catalyst is predominantly in the active form (of amorphous aluminium hydroxide and y-Al2O3). This is a prerequisite for the use of this waste material as a complete substitute for chemically pure Al2O3 in the technology of aluminate spinel pigments and reduction of their firing temperature. Besides, spent ACM catalyst already contains 5 Wt.% of expensive cobalt (II) oxide in the form of stable colour-bearing phase CoAl2O4.

Details

Pigment & Resin Technology, vol. 50 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 20 April 2022

Walaa M. Abd El-Gawad and Wael Mohamed Abdelmaksoud

This study aims to investigate the possibility of synthesizing cobalt doped willemite ceramic blue pigment by using Egyptian white sand as environmental and economical raw…

Abstract

Purpose

This study aims to investigate the possibility of synthesizing cobalt doped willemite ceramic blue pigment by using Egyptian white sand as environmental and economical raw material for multi-applications in coatings and inks.

Design/methodology/approach

After the synthesis process, the prepared blue pigment was characterized via X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray analysis technique. Then the blue pigment was integrated into both coating and ink formulations. The effect of the prepared multifunctional coatings on corrosion resistance and thermal stability was evaluated using different standard tests. Also, the effect of inclusion of blue pigment in flexographic printing ink formulation was done.

Findings

The results showed that the coating containing the cobalt doped willemite blue pigment offered good anticorrosive performance and high thermal stability. Additionally, the presented results revealed that integration of the blue pigment in flexographic printing ink formulation enhanced fineness, gloss, viscosity and color more than the commercial one “FX 430–201.”

Originality/value

In conclusion, relied on the eco-friendly principle which can be regarded as an economic and green strategy, it can be obtained that this new pigment can provide good multifunctions such as corrosion resistance and thermal stability in coatings and good fineness, gloss, viscosity and color in inks which can enable them to be widely applied in different industries.

Details

Pigment & Resin Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 25 February 2020

Masoud Rahimian, Ehsan Saebnoori and S.A. Hassanzadeh-Tabrizi

The purpose of this paper is to synthesize and characterize nano-ceramic blue pigment Co0.5Zn0.5Al2O4 via polyacrylamide gel method. Generally, the high cost and the…

Abstract

Purpose

The purpose of this paper is to synthesize and characterize nano-ceramic blue pigment Co0.5Zn0.5Al2O4 via polyacrylamide gel method. Generally, the high cost and the environmental toxicity of cobalt aluminate pigments lead them to become less common and cause problems in production process. To significantly reduce this problem, it is required to reduce the cobalt in the pigment and replace the cobalt with some amounts of zinc in the structure.

Design/methodology/approach

In this paper, calcination temperature and its effects on phase specification and color properties of final product were investigated. The powders were studied by using XRD, FESEM, TG/DTA, FTIR, UV-Vis and colorimetric in CIELab space, in which the calcination temperatures were set to 600°C, 800°C and 1,000 °C, and the inert atmosphere was air.

Findings

According to the XRD patterns, single-phase spinel structure with a good crystallinity was formed even in the low temperature. The infrared spectra displayed vibrations at about 500, 560 and 680 cm−1, which were ascribed to the spinel structure. FESEM images showed nanoscale particles with an average size of 32 nm. Regarding the Co2+ spin transitions in tetrahedral sites, the UV-Vis spectra presented three bands at 552, 598 and 628 nm.

Practical implications

The colorimetric data indicated the formation of blue pigments corresponding to negative values of b*. The color of pigments was affected by calcination temperature.

Originality/value

The characterization analysis shows that a blue pigment has been obtained in this research. Different degrees of blue color were obtained at different calcination temperatures.

Details

Pigment & Resin Technology, vol. 49 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 April 1993

F. Moztarzadeh, S. Boghozian and F. Halek

Pigments are fine solid particles which when exposed to light they emit different colours, depending on the nature of substances they are composed of.

Abstract

Pigments are fine solid particles which when exposed to light they emit different colours, depending on the nature of substances they are composed of.

Details

Pigment & Resin Technology, vol. 22 no. 4
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 4 September 2017

Liliya Frolova, Alexander Pivovarov and Tatyana Butyrina

The purpose of this work is to study the patterns of pigment colour formation and to develop metal compositions for obtaining spinels using the precipitation and heat…

Abstract

Purpose

The purpose of this work is to study the patterns of pigment colour formation and to develop metal compositions for obtaining spinels using the precipitation and heat treatment methods.

Design/methodology/approach

Precursor materials were prepared using co-precipitation method. Phase composition of pigments were determined by X-ray diffraction. Colour of pigments was determined spectrophotometry. Modelling of colour formation was performed using simplex method. Planning in the future to carry out full synthesis of pigments of blue, red and yellow colours.

Findings

The paper deals with the results of theoretical and experimental research on the synthesis pigments of blue, red and yellow colours based on Fe-Co-Al-O spinel. The influence of the chromophore cation content and the heat treatment temperature on optical and colour characteristics of pigments were studied.

Originality/value

The resulting composition-property diagrams make it possible to evaluate the effect of chromophore cations and heat treatment on the colour formation for Fe2O3-Al2O3-CoO system. Crystal-phase composition of the pigments is installed and its relationship with the optical colour characteristics. That makes it possible carry out targeted synthesis of pigments blue, red and yellow colours in further. The phase composition of pigments and its relationship with optical and colour properties has been established thus enabling the directed synthesis of blue, red and yellow pigments.

Details

Pigment & Resin Technology, vol. 46 no. 5
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 4 December 2019

Аleksandr Viktorovich Zaichuk, Аleksandra Andreevna Amelina and Kostyantyn Mikhalovich Sukhyy

The purpose of this paper is to establish physical-chemical patterns and process parameters for obtaining low-temperature pink pigments with the structure of tin sphene…

Abstract

Purpose

The purpose of this paper is to establish physical-chemical patterns and process parameters for obtaining low-temperature pink pigments with the structure of tin sphene using granulated blast-furnace slag.

Design/methodology/approach

Thermodynamic calculations were made in the work to assess the probability of malayaite phase formation during firing of slag-containing pigments. Mineralogical composition of synthesized pigments was evaluated by X-ray phase analysis. Spectral characteristics of pigments absorption in the infrared region were determined with the use of Fourier IR-spectrometry. Colour characteristics of the developed pigments and glass coatings with their introduction were studied on the comparator colour. Density of ceramic pigments was determined by pycnometric method, and chemical resistance was found on their weight loss after boiling in 1 N hydrochloric acid solution and 1 N sodium hydroxide solution.

Findings

Peculiar features of formation of the mineralogical composition of pink pigments are studied in the system CaO-MgO-Al2O3-SiO2-SnO2-Cr2O3 with the use of granulated blast-furnace slag. The end product and carrier of the pink colour is the solid solution on the basis of tin sphene. It is established that the most rational concentration of chromium (III) oxide for the formation of pink colouring of the pigments is 2 Wt.%.

Practical implications

The usage of developed pigments provides obtaining high-quality pink-coloured glaze coatings, in particular for ceramic tiles.

Originality/value

Activity of the components of blast-furnace slag in combination with the effective mineralizing action of B2O3 additive allows performing the firing of pink of the pigments with the formation of tin sphene at reduced temperature of 1,200°C.

Details

Pigment & Resin Technology, vol. 49 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 15 February 2021

Amruta Joglekar-Athavale and Ganapti S. Shankarling

The review glances upon the colorants used for printing on ceramic substrates by ink jet technology and techniques, chemistry involved during the selection of the colorants.

Abstract

Purpose

The review glances upon the colorants used for printing on ceramic substrates by ink jet technology and techniques, chemistry involved during the selection of the colorants.

Design/methodology/approach

The ink jet technology is an easy and a convenient technique, specially designed colorants are used for such applications with tailor made properties and features.

Findings

New developments in technology and chemistry of colorants to achieve successes in application studies of ceramic substrates.

Research limitations/implications

N/A.

Practical implications

This review glances upon the history, development and practical approach of the current techniques with available dyes and pigments and the techniques involved during the synthesis and application.

Originality/value

The review paper provides information about the development of the inkjet technique on ceramics and available colorants with methods.

Details

Pigment & Resin Technology, vol. 51 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 December 2002

Ana L. Fernández and Liberto de Pablo

Nanocrystalline cobalt spinels were synthesized under hydrothermal conditions, starting from metal chlorides. The color properties in these systems mainly depend upon the…

1202

Abstract

Nanocrystalline cobalt spinels were synthesized under hydrothermal conditions, starting from metal chlorides. The color properties in these systems mainly depend upon the preparative method and cation distributions, which have been determined by X‐ray powder diffraction using Rietveld refinements and visible near infrared absorption spectra. We observe the influence of tetrahedral and octahedral preference of cations such as Co2+, Cr3+, Mn3+ upon the formation and the color development of cobalt spinel pigments. All the samples prepared revealed the formation of single spinel with particle size at about 0.8‐2.1 μm; CoAl2O4 reveals king's blue, CoMn2O4 dark blue and CoCr2O4 bluish green. Cobalt blues developed giving deep absorption characteristic of tetrahedral Co2+ ions at about 550‐680 nm; therefore, color changed from king's blue to bluish green in CoCr2O4, showing the absorption band of octahedral Cr3+ ions owing to the large excess octahedral crystal field stabilization energy.

Details

Pigment & Resin Technology, vol. 31 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 June 2003

R. Aghababazadeh, A.R. Mirhabibi, F. Moztarzadeh and Z. Salehpour

In this paper, the synthesis and the application of chromic oxide as a high temperature pigment have been reported. To synthesise chromic oxide, solid‐state reaction using…

Abstract

In this paper, the synthesis and the application of chromic oxide as a high temperature pigment have been reported. To synthesise chromic oxide, solid‐state reaction using sulphur and sodium chromate tetrahydrate was undertaken. Morphology of the pigment synthesised was investigated by scanning electron microscopy. Formation of the chromic oxide was observed at 888°C in an oxidising atmosphere. Thorough washing of the resultant pigment played a vital role in the aggregation of the pigment particles, as demonstrated by a particle size characteristics.

Details

Pigment & Resin Technology, vol. 32 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 20 October 2021

Romina Mehrabi, Hamid Reza Rezaie and Bijan Eftekhari Yekta

This study aims to the effect of NaF, Li2CO3 and H3BO3 minerals was investigated, and the best mineralizer was found to be H3BO3. Furthermore, the effect of temperature…

Abstract

Purpose

This study aims to the effect of NaF, Li2CO3 and H3BO3 minerals was investigated, and the best mineralizer was found to be H3BO3. Furthermore, the effect of temperature was investigated, and the synthesized samples were calcined at temperatures of 1100, 1200 and 1300 °C to select the optimum calcination temperature.

Design/methodology/approach

This study was aimed at thoroughly investigating the effects of mineralizer addition and temperature on the synthesis of malayaite pink pigment based on raw materials of SnCl2-SiO2-Ca(OH)2-K2Cr2O7. To this end, the optimization of the synthesis parameters such as mineralizer addition and temperature was completely perused.

Findings

The optimum temperature was 1300 °C, and the color efficiency of pigments was evaluated by colorimetric (CIE L*a*b* system) analysis, and these parameters were close to those of industrial pigments.

Originality/value

To the best of the authors’ knowledge, for the first time, the effect of mineralizer addition and temperature on the synthesis of malayaite pink pigment was investigated through the sol-gel method. Herein, different parameters were optimized to propose a novel pigment with a much better performance.

Details

Pigment & Resin Technology, vol. 51 no. 5
Type: Research Article
ISSN: 0369-9420

Keywords

1 – 10 of 137