| 摘要 |
PROBLEM TO BE SOLVED: To provide lead-free glass which is improved particularly in environmental resistance and is improved in workability and durability, and to provide a magnetic head using the lead-free glass. SOLUTION: The lead-free glass is composed of SiO<SB>2</SB>and ZnO as principal components, and further contains TeO<SB>2</SB>and Bi<SB>2</SB>O<SB>3</SB>, wherein the content combining the contents of the TeO<SB>2</SB>and the Bi<SB>2</SB>O<SB>3</SB>is within a range from 19 to 24 (mol%) and the content of the TeO<SB>2</SB>is greater than the content of the Bi<SB>2</SB>O<SB>3</SB>. The lead-free glass is used as joining glass for the magnetic head. As a result, the stable glass state can be obtained and the glass transition temperature (Tg) and sag point (At) can be lowered within a prescribed range, as a result of which the working temperature can be lowered and the exertion of an adverse influence by heat on a core half body can be appropriately prevented. The difference in the coefficient of thermal expansion between the joining glass and the core half body can be reduced and the magnetic head having the excellent durability can be manufactured. COPYRIGHT: (C)2006,JPO&NCIPI
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