Synthesis of Sphene (CaSnSiO₅)-Pink Pigments with CrCl₃

Abstract

In high temperature ceramic glazes, a stable range of pink-red colors that produced Cr 2 O 3 -SnO 2 -CaO-SiO 2 pigments were factored by Cassiterite(SnO 2

Sol-gel Synthesis and Optical Properties of Malayaite Ceramic Colour Pigments

“…A drop at around 650 nm is typical of the 3d 3 ions which are from the anti-crossing of the spin forbidden 1 E and 1 t 2 levels (Lopez-Navarrete et al 2003). The absorption band at 380 nm was originated from unreacted Cr 3+ but was not detected by XRD (Lee & Lee 2009). The brightness (L) decreased by almost half with Cr doping whereas the positive a value jumped by almost four times, indicating a higher degree of redness.…”

“…The structure itself could also accommodate several d-and f-elements, especially in the tin and calcium sites (Ou-benmmou et al 2000), with only a few pink-tone pigments produced industrially (12-25-5 in the DCMA classification) (Harisanov et al 2003). The malayaite phase is also an only alternative to cadmiumcontaining pigments yielding deep burgundy shades (Lee & Lee 2009;Lopez-Navarrete et al 2003).…”

Study of ceramic pigments with tin sphene structure in the system CaO-MgO-Al2O3-SiO2-SnO2-Cr2O3

“…It is evident that β-quartz which is introduced by quartz sand is consumed to form the malayaite phase. Furthermore, starting from 1,250°С, a set of absorption bands typical for tin sphene (Zhang et al , 1999; Lee and Lee, 2009; Lee et al , 2009; Cordoncillo et al , 2009; Lopez-Navarrete et al , 2003; Lopez-Navarrete and Ocana, 2002) is recorded. These bands reach maximum intensity after firing at the temperature of 1,350°С.…”

Recycling of the product of thermal inertization of cement–asbestos for various industrial applications

“…Purple and pink color pigments belonging to this class have been used in porcelain glazes. These Cr-cassiterite pigments show a purple or violet color that originated from formed Cr(IV) ions that were dissolved in SnO 2 crystals (Lee and Lee, 2009).…”