feldspar and boron-oxide

feldspar has been researched along with boron-oxide* in 1 studies

Other Studies

1 other study(ies) available for feldspar and boron-oxide

Article	Year
Preparation and characterization of new dental porcelains, using K-feldspar and quartz raw materials. Effect of B2O3 additions on sintering and mechanical properties. Materials science & engineering. C, Materials for biological applications, 2016, Aug-01, Volume: 65 The aim of this work was to determine the effect of temperature and boric oxide (B2O3) addition on sintering and mechanical properties of a newly developed dental porcelain (DP) prepared from local Algerian raw materials. Based on a preliminary work, the new selected composition was 75wt.% feldspar, 20wt.% quartz and 5wt.% kaolin. It was prepared by sintering the mixture at different temperatures (1100-1250°C). The optimum sintering conditions gave a relatively higher density (2.47g/cm(3)) and excellent mechanical properties. The three point flexural strength (3PFS) and Martens micro-hardness of dental porcelains were 149MPa and 2600MPa, respectively. This obtained 3PFS value is more than four times greater than that of hydroxyapatite (HA) value (about 37MPa) sintered under the same conditions. However, the sintering temperature was lowered by about 25 and 50°C for 3 and 5wt.% B2O3 additions, respectively. But, it did not improve furthermore the samples density and their mechanical properties. It has also been found that B2O3 additions provoke a glass matrix composition variation which delays the leucite formation during sintering. Topics: Aluminum Silicates; Boron Compounds; Calorimetry, Differential Scanning; Dental Porcelain; Hardness; Microscopy, Electron, Scanning; Potassium Compounds; Quartz; Spectroscopy, Fourier Transform Infrared; Temperature; Tensile Strength; X-Ray Diffraction	2016

Article

Year

Preparation and characterization of new dental porcelains, using K-feldspar and quartz raw materials. Effect of B2O3 additions on sintering and mechanical properties.

Materials science & engineering. C, Materials for biological applications, 2016, Aug-01, Volume: 65

The aim of this work was to determine the effect of temperature and boric oxide (B2O3) addition on sintering and mechanical properties of a newly developed dental porcelain (DP) prepared from local Algerian raw materials. Based on a preliminary work, the new selected composition was 75wt.% feldspar, 20wt.% quartz and 5wt.% kaolin. It was prepared by sintering the mixture at different temperatures (1100-1250°C). The optimum sintering conditions gave a relatively higher density (2.47g/cm(3)) and excellent mechanical properties. The three point flexural strength (3PFS) and Martens micro-hardness of dental porcelains were 149MPa and 2600MPa, respectively. This obtained 3PFS value is more than four times greater than that of hydroxyapatite (HA) value (about 37MPa) sintered under the same conditions. However, the sintering temperature was lowered by about 25 and 50°C for 3 and 5wt.% B2O3 additions, respectively. But, it did not improve furthermore the samples density and their mechanical properties. It has also been found that B2O3 additions provoke a glass matrix composition variation which delays the leucite formation during sintering.

Topics: Aluminum Silicates; Boron Compounds; Calorimetry, Differential Scanning; Dental Porcelain; Hardness; Microscopy, Electron, Scanning; Potassium Compounds; Quartz; Spectroscopy, Fourier Transform Infrared; Temperature; Tensile Strength; X-Ray Diffraction

2016