V-containing ZrO₂ inorganic yellow nano-pigments

Abstract

In this work we report new results on the preparation, characterization and color properties of the inorganic yellow nano-pigmenting system based on monoclinic V-ZrO 2 solid solution nanoparticles. The series of solid solution nanopowders were obtained by a polyol technique where the precipitates, obtained after heating at 180 ºC ethylenglycol solutions of vanadyl acetonate and zirconium n-propoxide, were annealed at different temperatures up to 1300 ºC for short duration, in order to improve their crystallinity and control the crystalline form of the final nanoparticles. On annealing at around 450 ºC high crystalline tetragonal V-containing zirconia particles were developed, which transform into the monoclinic form of the V-ZrO 2 solid solution after subsequent annealing at 800 ºC. Interestingly, the final non-aggregated, well-shaped monoclinic zirconia solid solution particles heated even at as high temperatures as 1000 ºC, were sized in the nanometric range displaying well-defined faces and edges. The chromatic coordinates of the prepared nano-pigments after annealing at different temperatures between 800 and 1300 ºC indicated yellowness values comparable to conventionally prepared micrometric yellow pigments. The stability of the nanopigments in aqueous dispersions estimated by zeta potential measurements was good with a low degree of particles´ aggregation. The used polyol-mediated synthesis can be up-scaled on an industrial level in the preparation of zirconia-based nano-pigmenting systems.19 characteristics allow using the polyol approach as a suitable way of industrial manufacture of nano-pigments.From the results obtained in this specific pigmenting ceramic system it can be inferred that the polyol approach can be applied for the preparation of other widely used micrometric ceramic pigmenting systems in the nanometric scale with a good control of the three main characteristics of particles, i. e., size, degree of agglomeration and phase composition.

Role of walnut ac-based Si-ZrO2: investigation of rietveld refinement, optical and electrochemical properties for pseudo-capacitor applications

“…Meanwhile, as the silicon concentration increases in zirconia, it shows the minor formation of agglomerates which may be due to the sticky nature of zirconia or by the interfacial replacement of ions. The calculated average particle size is found in the range of 217-212 nm [36][37][38].…”

Review: development of inkjet printing colorants in ceramics

“…2.3.5.3 Optical properties (Gallage et al, 2008;Güngor et al, 2015;Calatayud and Alarc on, 2017;Cerro et al, 2019;Opuchovicn and Kareiva, 2015;Rodrigues Fiuza et al, 2018;Luxov a et al, 2019;Tang et al, 2018;Tang et al, 2019). The chromatic coordinates, by which the tinctorial strength is calculated, are affected by both the refractive indexes and the main absorption bands in the visible spectrum.…”

Fabrication and properties of pink 3 mol% yttria‐stabilized zirconia ceramics with high toughness

“…18,19 In recent years, the application of colored 3YSZ ceramics has expanded into a smart terminal, dental restoration, colored decoration, and other potential fields, which is attributed to the brilliant luster, excellent mechanical properties, and favorable biocompatibility of the materials. [20][21][22] Nowadays, in addition to white ceramics, ceramics with other colors such as black, red, blue, etc. have also been developed and widely used in medicine, decoration, jewelry, and other growing industries, among them, especially in the mobile phone back panels.…”

“…Since color is an important feature in the fields of electronics, decoration, and jewelry, in addition to mechanical properties, the study of color in ZrO 2 materials is also of importance and interest 18,19 . In recent years, the application of colored 3YSZ ceramics has expanded into a smart terminal, dental restoration, colored decoration, and other potential fields, which is attributed to the brilliant luster, excellent mechanical properties, and favorable biocompatibility of the materials 20–22 . Nowadays, in addition to white ceramics, ceramics with other colors such as black, red, blue, etc.…”