Effect of nucleating agents on microstructure and mechanical properties of SiO2-Al2O3-ZrO2 glass-ceramics

  • Yu Li-ping 
  • Xiao Han-ning Email author
  • Hu Peng-fei 


SiO2-Al2O3-ZrO2 glasses with different nucleating agents were crystallized under special processing schedule. The microstructure and mechanical properties of the glass-ceramics in SiO2-Al2O3-ZrO2 system were investigated by differential scanning calorimetry, scanning electron microscopy, X-ray diffraction and three-point bending method. The results show that ZrO2 is not an effective nucleating agent in SiO2-Al2O3-ZrO2 system, while TiO2 is effective for the separation of spinel, and P2O5 facilitates solubility of ZrO2 in glass and crystallization. The main crystalline phases of the glass-ceramics are spinel, anorthite and tetragonal zirconia. With the increase of ZrO2 content in the glass, glass-ceramics show higher bending strength (120 MPa) than others.

Key words

glass-ceramics SiO2-Al2O3-ZrO2 system microstructure mechanical property 

CLC number



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Copyright information

© Central South University 2005

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringHunan UniversityChangshaChina
  2. 2.School of Chemistry and Chemical EngineeringHunan Normal UniversityChangshaChina

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