title: [Effects of alumina particle-size on mechanical properties of alumina-glass composite].
abstract: OBJECTIVE
  To study the effects of alumina particle-size on mechanical properties of alumina-glass composite.
  
  
  METHODS
  Alumina compacts were prepared by isostatic press method and sintered at 1400 degrees C for 2 hours with two various particle-size alumina. Alumina-glass composite was made by infiltrating partially sintered porous alumina with glass at 1200 degrees C for 4 hours.
  
  
  RESULTS
  The strength and fracture toughness of nanometre alumina-glass composite were 358.2 MPa, 2.38 MPam1/2 respectively. The strength and fracture toughness of micrometer alumina-glass composite were 432.2 MPa, 5.12 MPam1/2 respectively. Image analysis of SEM micrograph showed that porous rate was about 11.5% in the nanometer alumina-glass composite, 1.2% in the micrometer alumina-glass composite, and there was more glass composition in the nanometer alumina-glass composite than that in the micrometer alumina-glass composite.
  
  
  CONCLUSIONS
  The alumina volume percentage and porous rate play an important role in the strength and fracture toughness of alumina-glass composite.
authors.affiliation: College of Stomatology, West China University of Medical Sciences.
authors.forename: X
authors.initials: X
authors.lastname: Luo
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: Y
authors.initials: Y
authors.lastname: Chao
authors.forename: J
authors.initials: J
authors.lastname: Tian
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: S
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D010316:Particle Size; D018583:Pliability; D013718:Tensile Strength
chemical_list: D003776:Dental Porcelain; D000537:Aluminum Oxide