| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance the photoelectric conversion efficiency of CIS solar batteries and the like, and reduce the manufacturing cost thereof by originating a substrate material having a high mechanical strength and heat resistance, and a proper thermal expansion coefficient. <P>SOLUTION: A tempered glass has a glass composition of, in mass%, 40 to 75% SiO<SB>2</SB>, 10 to 30% Al<SB>2</SB>O<SB>3</SB>, 0 to 10% B<SB>2</SB>O<SB>3</SB>, 3 to 20% Li<SB>2</SB>O+Na<SB>2</SB>O+K<SB>2</SB>O (the total amount of Li<SB>2</SB>O+Na<SB>2</SB>O+K<SB>2</SB>O ), 0 to 20% Na<SB>2</SB>O, 0 to 15% K<SB>2</SB>O, 1 to 20% MgO+CaO+SrO+BaO (the total of MgO+CaO+SrO+BaO), 1 to 15% CaO, and 0 to 15% ZrO<SB>2</SB>, and substantially does not contain As<SB>2</SB>O<SB>3</SB>, Sb<SB>2</SB>O<SB>3</SB>, PbO and F, and has a mass ratio of Al<SB>2</SB>O<SB>3</SB>/SiO<SB>2</SB>of 0.1 to 0.7, and a mass ratio of ZrO<SB>2</SB>/Al<SB>2</SB>O<SB>3</SB>of 0 to 0.3. <P>COPYRIGHT: (C)2010,JPO&INPIT |
