Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)<sub>2</sub>O<sub>4</sub> pigments synthesized by solution combustion route

Gilabert, J.; Palacios, M.D.; Sanz, V.; Mestre, S.

doi:10.1111/ijac.12761

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…One of the most important ceramic pigments in the industry is cobalt blue, with spinel structure CoAl 2 O 4 , due to its color and thermal stability when it is used as a coloring agent in glaze and bulk tile compositions [12]. Due to its importance, several synthesis methods have been studied to obtain it to improve some of the final characteristics, such as hydrothermal [16,17], sol-gel [18][19][20], low-temperature combustion [21,22] and spray pyrolysis [23].…”

Section: Introductionmentioning

confidence: 99%

Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption

Paulo-Redondo,

Nebot-Díaz

2023

Eng

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Due to the importance of optimizing the manufacture of ceramic pigments, motivated by the increase in prices of both raw materials and energy, and the need to control manufacturing parameters to obtain optimal conditions for the preparation of ceramic inks, two synthesis routes (traditional route and coprecipitation) and two calcination methods (traditional oven and microwave oven) are proposed to obtain the blue ceramic pigment CoAl2O4 with the aim of minimizing the use of mineralizers or flux agents and reducing energy consumption in its manufacturing. The pigments prepared were characterized by thermal analysis and structurally by XRD and SEM, with particle sizes below 300 nm observed. Finally, the colorimetric coordinates of glazed tiles with the pigments obtained were characterized. In all cases, the microwave-assisted synthesis increased the color intensity, considerably decreasing the temperature and calcination time, obtaining a particle size under 300 nm with a very narrow size distribution, and substantially improving the energy cost of its preparation and the color development of the final product. The viability of the combination of synthesis by coprecipitation and microwave calcination as a method of industrial preparation of ceramic pigments has been demonstrated.

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Section: Introductionmentioning

confidence: 99%

Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption

Paulo-Redondo,

Nebot-Díaz

2023

Eng

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“…Therefore, various chemical methods have been developed to overcome them. Recently, several wet‐chemical process techniques such as sol‐gel, 7,9,17 hydrothermal crystallization, 18,19 coprecipitation, 20 and combustion 21‐23 have been employed for the syntheses of spinel crystals. Among them, combustion technique is a convenient method for preparing highly purified and nano‐sized crystalline powders at lower calcination temperatures in shorter period of time.…”

Section: Introductionmentioning

confidence: 99%

Effective synthesis of green nano‐sized ceramic pigments by co‐doping Zn²⁺, Cr³⁺ and Sm³⁺ into the cobalt‐aluminate

Zhang

Zhao

Wang³

et al. 2020

Int J Applied Ceramic Tech

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A green nano‐sized ceramic pigment Co0.6Zn0.4Al0.8Cr1.2‐xSmxO4 has been successfully prepared by doping ions Zn2+, Cr3+, and Sm3+ into the crystalline CoAl2O4 spinel and using the complex‐gel method along with agar as complexing and combustion agent. The Infrared Spectroscopy, X‐ray diffraction, Thermo‐gravimeter, High resolution transmission electron microscopy, Automatic color reader, and UV Vis diffuse reflectance were applied to characterize the pigment power and its gel precursor. The results reveal that the introduction of Zn2+, Cr3+, and Sm3+ could change the occupation status of ions in the tetrahedral and octahedral framework of CoAl2O4 spinel, leading to the colorant variation of the blue cobalt pigment CoAl2O4, With increasing the content of Sm3+ ion, the reflection peak position of the pigments in visible spectrum appeared a red‐shift, ie the color transition from blue green to yellow green, and the average reflectivity in the violet region decreased to 13.31%, and the band gap energy also changed from 3.47 to 3.20 eV. This illustrates the better UV absorption of this green pigment and can be used as UV shielding material. With the hydrochloric acid or sodium hydroxide solution treatment, this pigment was found to be durable in chemical stability.

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Ceramic pigments and dyes beyond the inkjet revolution: From technological requirements to constraints in colorant design

Molinari

Conte

Zanelli

et al. 2020

Ceramics International

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Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)₂O₄ pigments synthesized by solution combustion route

Cited by 6 publications

References 29 publications

Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption

Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption

Effective synthesis of green nano‐sized ceramic pigments by co‐doping Zn²⁺, Cr³⁺ and Sm³⁺ into the cobalt‐aluminate

Ceramic pigments and dyes beyond the inkjet revolution: From technological requirements to constraints in colorant design

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Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)2O4 pigments synthesized by solution combustion route

Cited by 6 publications

References 29 publications

Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption

Study of the Synthesis Variables in the Preparation of CoAl2O4 Pigment Using Microwaves to Reduce Energetic Consumption

Effective synthesis of green nano‐sized ceramic pigments by co‐doping Zn2+, Cr3+ and Sm3+ into the cobalt‐aluminate

Ceramic pigments and dyes beyond the inkjet revolution: From technological requirements to constraints in colorant design

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Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)₂O₄ pigments synthesized by solution combustion route

Effective synthesis of green nano‐sized ceramic pigments by co‐doping Zn²⁺, Cr³⁺ and Sm³⁺ into the cobalt‐aluminate