title: [Preparing of Al2O3/ZrO2 composite dental ceramics through isostatic pressing technology].
abstract: OBJECTIVE
  To find out how to prepare high-density dental ceramics through isostatic pressing so that sintering shrinkage will be reduced.
  
  
  METHODS
  To prepare Al2O3/ZrO2 composite powder first, then to mold through dry-pressing, and to shape the green-body through isostatic pressing. The green-bodies were sintered at the temperature of 1 400 degrees C and kept at the temperature for different period of time (2 h, 3 h, 4 h). After that, the density and fracture strength were measured and the microstructure observed by scanning electron microscope (SEM).
  
  
  RESULTS
  The sample product's density, line-shrinkage, and fracture strength of ceramics was rising with the sintering time lengthened. The sample product kept under the temperature of 1 400 degrees C for 4 hours, the fracture strength was (497.27 +/- 78.45) MPa and glass phase distributed evenly in the ceramics and the grains were integrated owing to the glass phase. The longer the sintering time, the more even the microstructure was.
  
  
  CONCLUSIONS
  The sintering quality and the efficiency were improved through isostatic pressing.
authors.affiliation: School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 612010, China.
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Liang
authors.forename: Guang-Fu
authors.initials: GF
authors.lastname: Yin
authors.forename: Shi-Yuan
authors.initials: SY
authors.lastname: Yang
authors.forename: Jun-Xia
authors.initials: JX
authors.lastname: Wang
mesh_terms: D002516:Ceramics; D003764:Dental Materials; D005898:Glass; D013696:Temperature
chemical_list: D003764:Dental Materials