Relationship between leucite content and compressive strength of K₂O-Al₂O₃-SiO₂ system dental glass ceramics

Abstract

Relationship between leucite content and compressive strength of K₂O-Al₂O₃-SiO₂ system dental glass ceramics were investigated. 10 groups of feedstock powder with different compositions were treated according to the same thermal treatment system of leucite micro-crystallization reported in some primary studies. The products of each group were analyzed by X-ray diffractometer, polaring microscope and scanning electronic microscope (SEM), and then the compressive strength was tested by a material testing machine. A direct proportion was found between leucite content and the compressive strength when leucite content was less than 50 vol%, and compressive strength decreased with the increasing of leucite micro-crystals when leucite content was more than 50vol%, The leucite content has a notable influence on the compressive strength of K₂O-Al₂O₃-SiO₂ system dental glass ceramics.

Keywords

leucite content / compressive strength / glass ceramics

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