1,721,076 research outputs found
Le nanopolveri nella funzionalizzazione delle superfici ceramiche
No full textIn questo articolo, dopo una brave introduzione sul significato di nano, nanotecnologia e nanopolvere, si valutano le possibili applicazioni nella funzionalizzazione della superficie dei materiali ceramici tradizionali
Coloring effects of synthetic inorganic cobalt pigments in fast-fired porcelainized tiles
No full textThis paper reports a laboratory and industrial study on the rationalization of using synthetic cobalt oxide, aluminate, and silicate pigments (0.5-4.0 wt%) for coloring porcelainized stoneware tiles. Adding about 1-2 wt% of pigments to the base body does not appreciably modify the microstructure, nature, and amount of phases of the fired tiles, while higher amounts, by promoting liquid phase formation, favor the sintering and can cause swelling of compact samples
Rheological Investigations of Clay Suspensions for the Optimization of Deflocculation Process
No full textThe rheological properties of clay aqueous suspensions are investigated in order to optimize the deflocculating dosages. The effects of four deflocculants have been investigated on the slip casting performance. The laboratory study on the deflocculation of casting slips has yielded the parameters from which the most efficient and economically advantageous deflocculant or mixture of deflocculants can be proposed for each ceramic body
Inorganic pigments for ceramic tiles: Characteristics and industrial applications
No full textThis paper aims at presenting an overview of recent trends in the industrial applications of inorganic pigments in the tile industry. Examples of applications of natural and synthetic inorganic pigments to colour-glazed and unglazed tiles at high temperatures are presented. The most important aspects concerning the physical and chemical properties of pigments, the design of new pigments and application of unconventional synthesis methods are discussed
Inorganic Pigments
No full textIn this paper the authors report the main characteristic of inorganic pigments used to color industrial ceramic material
Quantitative analysis of crystalline phases in a LZS glass-ceramic
No full textResults of adequately heat-treated Li2O-ZrO2-SiO 2 (LZS) glass-ceramic that consider the identification and quantification of crystalline and glassy-formed phases and their concentration profiles using the Chung method were presented. The batch produced 100 g of glass was placed into a platinum crucible and melted at 1450°C for 7 h in an electrically heated furnace and quenched onto a steel mold. X-ray diffraction (XRD) patterns show ZrSiO2 formation at 850°C, while at 900°C, the intensity of the compound increases and Li2O-2SiO 2 appears. The peak intensities registered at 950°C show an increased volume fraction occupied by the crystals. The compositions of LiSi2O5 and ZrSiO4 and total glass-ceramic crystalline phase are the function of the applied heat-treatment temperature
Na-Silicates as Deflocculating Agents for Clays
No full textIn this paper the rheological behavior of clay aqueous suspensions added with various commercial sodium silicates is investigated, in order to evaluate their utilization as deflocculating agents in practical industrial applications. In the sample preparations the industrial experimental conditions have been reproduced as nearly as possible. The best deflocculating conditions of the studied clays were obtained by using a sodium silicate compound having a SiO//2/Na//2O molar ratio of 2/1. This may be explained, since this silicate is the most effective as pH corrector, as deflocculant cation sequestering agent and as colloidal protector
- …
