Synthesis of Cr-doped Al2O3 by Pechini sol-gel method and its application for reversible thermochromic sensors

A Temperature-Responsive Copper Molybdate Polymorph Mixture near to Water Boiling Point by a Simple Cryogenic Quenching Route

“…phase transition 15 , which in turn affect the absorption spectrum of the material.Inorganic thermochromic materials have the advantage of better stability and longer lifetime as well as easy and cost-effective preparation over their commonly used organic counterparts. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] Most of the available inorganic thermochromic metal oxides are reversible (figure 2 and table S1) and cannot be used to continuously and reliably monitor the temperature change over a period because their color changes back to its original color on cooling. 16,17,25 In contrast, irreversible materials are Figure 2.…”

“…and this limits their practical use, which enhances the need for and importance of low transition temperature inorganic thermochromic materials. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] Ehrenberg et al, in 1997 reported the presence of a new phase in CuMoO4, which is stable below -73 °C. 19 In 1997, Wiesmann et al, reported phase transition from the stable to the phase in single crystal CuMoO4 at atmospheric pressure by cooling at -83 °C or at room temperature by applying pressure (0.2 GPa).…”

Preparation, structural and spectroscopic study of sol-gel-synthesized $$\hbox {Cr}^{3+}$$:$$\hbox {Al}_{2}\hbox {O}_{3}$$ powder

“…Wet chemical route generally is a good way to resolve it [28]. The fine control of the stoichiometry of metals and high homogeneity of end products can be provided by wet chemical synthesis routes [29][30][31][32][33]. The stoichiometry control is attributed to the mixing of starting materials at the molecular level.…”

Síntese De Hidroxiapatita via Rota Pechini: Uma Breve Revisão

“…Este método baseia-se na quelação catiônica por ácido cítrico e na poliesterificação entre ácido cítrico e etileno glicol, o que leva à formação de um intermediário de resina policatiônica. Este intermediário de resina resultante contém átomos de metal ligados através de oxigênio a radicais orgânicos que compreendem a rede reticulada e, assim, interconectam as espécies reagentes (Nguyen et al, 2019). A policondensação do etileno glicol e ácido cítrico começa acima de 100 °C, resultando na formação de gel de citrato de polímero.…”