Effect of Polymorphism of SiO2 Addition on Mechanical Properties of Feldspathic Porcelains

Abstract

The present study aimed to investigate the effects of SiO2 polymorphism on the mechanical properties of feldspathic porcelains. Seven kinds of experimental feldspathic porcelains were prepared using chemical reagents; three types of low-fusing feldspathic glasses and four types of two-phase porcelains by adding 10 or 20 mass% of fused silica (T-F) or cristobalite (T-C). Flexural strength and fracture toughness of these porcelains were evaluated. Flexural strengths of two-phase porcelains did not show any significant increase when compared with those of single-phase glasses. On the other hand, fracture toughnesses of porcelains with cristobalite showed a significant increase when compared with those of single-phase glasses. Circumferential cracks were observed in the porcelains with cristobalite. These results suggested that cristobalite could strengthen fracture toughness of feldspathic porcelains, but not flexural strength.

Effect of Zirconia Silica Nanofibers on Flexural Strength of Feldspathic Ceramic - An Experimental Study

“…The previous studies[ 11 12 13 14 15 16 17 18 ] described various techniques to reinforce veneering or metal ceramics. Nanoscience is the manufacturing of materials in billions of meters or nanometer to 2–3 atoms.…”

Comparative Evaluation of Flexural Strength of Nano-zirconia-integrated Pressable Feldspathic and Lithium Disilicate Ceramics

“…9 The effective employment of nanoparticles to improve the properties of conventional ceramics is limited in literature. [10][11][12][13] This study evaluated and compared the flexural strength of reinforced feldspathic porcelain and lithium disilicate ceramics with various percentages of zirconia nanoparticles.…”