Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (3): 5-8.

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Structures and Properties of Na2O-BaO-AI2O3-P2O5 Glass

Deng Zai-de  Sun Jia-sen  Yin Bing  Yang Gang-feng  Chen Dong-dan   

  1. Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology,the Ministry of Education,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-06-09 Online:2005-03-25 Published:2005-03-25
  • Contact: 邓再德(1945-)，男，教授，主要从事特种光纤基质玻璃的研究． E-mail:imdengzd@scut.edu.cn
  • About author:邓再德(1945-)，男，教授，主要从事特种光纤基质玻璃的研究．
  • Supported by:

    广东省自然科学基金资助项目(013013)；广东省科技计划资助项目(2002B1 1604)

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Abstract:

In phosphate ass composed of 16.7Na2O•27.8BaO•xAl2O3•(55.5-x )P2O5( x=0,2.8,5.6,8.4,11.1.in mole)and doped with Nd2 O3，the relationships between the Al2O3content and the characteristics-density,molar volume,refractive index,transition temperature Tg ,softening temperature Tf,thermal expansion index and chemical stability-were studied.The structure of the glass was also investigated by means of infrared spectral analy-sis.Th e results show that,with the increase in Al2O3content,the density,refractive index,Tg and Tf of the glass increase,and the chemical stability gradually increases,while the molar volume and therm al expansion index de-crease.Th is indicates that,in phosphate glass,increased Al2O3content strengthens the network,thus improving the physical-chemical properties of the glass. Infrared spectral analyses show that the variation of the absorption peak of P-O-Al band is consistent with the improvement of the glass properties.

Key words: phosphate glass, physical-chemical property, structure