Synthesis of Perovskite by Solid-Phase Method with Metatitanic Acid and Calcium Carbonate and Its Pigment Properties Investigation

Abstract

Synthetic perovskite powder (SPP) was synthesized by the solid-phase method using metatitanic acid (TiO2·nH2O) and calcium carbonate (CaCO3) as raw materials, and its structure, morphology, pigment properties and application in architectural coatings were studied. When TiO2·nH2O and CaCO3 were mixed and ground at a molar ratio of TiO2:CaO = 1:1, and then calcined at 900–1100 °C, SPP with a single perovskite phase was obtained. The characterization results displayed that the unit particle size of SPP was 50–150 nm, the aggregate size was 1–2 μm, and its particles were well dispersed. The SPP also had a whiteness of 90.5%, and an oil absorption of 35.03 g/100 g. The hiding power of SPP was 24.02 g/m2, which was 81.6% of pure TiO2 hiding power (19.60 g/m2). When adding SPP to prepare a building exterior wall coating, the contrast ratio of the coating film was 0.92, which met the requirements of the Chinese national standard GB/T 9755-2014 and was equivalent to adding rutile titanium dioxide. Thus, perovskite synthesized from TiO2·nH2O and CaCO3 by the solid-phase method significantly improved the pigment properties of TiO2 in the same proportion.

Perovskite Oxides: Syntheses and Perspectives on Their Application for Nitrate Reduction

“…Also, most ceramics are evenly synthesized in this way and are utilized to create polycrystalline materials. This method requires raw carbonate and/or oxide form materials . The raw components do not interact chemically in this process at room temperature.…”

“…This method requires raw carbonate and/or oxide form materials. 63 The raw components do not interact chemically in this process at room temperature. However, the chemical reaction occurs quickly when the raw material mixture is heated to very high temperatures (about 700–1500 °C).…”

Preparation and Chromaticity Control of CoTiO3/NiTiO3 Co-Coated TiO2 Composite Pigments

“…Owing to excellent weather resistance, thermal stability and high hiding power, inorganic pigments are widely used in ceramics, high temperature materials, inks, coating materials and plastics [1][2][3][4][5]. However, most inorganic pigments contain toxic elements such as heavy metals, making inorganic pigments not only costly, but also have adverse effects on human health and the environment, which severely restricts their development [6][7][8].…”