Effect of Praseodymium Oxide on Thermal and Optical Properties in Raw Transparent glaze

Abstract

The light green transparent glaze was prepared by introducing praseodymium oxide as a colorant used in raw glaze. The effect of Pr6O11 on the thermal and color properties of the transparent glaze was investigated by thermogravimetry and differential thermal analysis and reflection spectra, respectively. The introduction of Pr6O11 could not form new crystalline phases in the transparent glaze. The glass transition temperature and melting temperature of the transparent glaze decreased with the increasing Pr6O11, which is due to the high field strength of Pr ion. In addition, the mechanism of color formation in the glaze containing Pr6O11 was also discussed.

New insight into the modification of pore structure in porous ceramics prepared from fly ash rich in CaO

“…An addition of 0–50wt.% dolomite initially enlarged the average pore diameter from ∼8.17 μm to ∼12.98 μm and then decreased to ∼2.82μm, which was consistent with the change of the pore size distribution of ceramics. This phenomenon might be explained as follows: the release of CO 2 from decomposition of dolomite generated new pores, while higher dolomite addition could introduce more CaO and MgO (alkaline‐earth oxides) to decrease melt viscosity, thereby further promoting the flowability of the melt among pores and the formation of small‐size pores …”