制备了MoO3-V2O5-P2O5-Fe2O3系磷酸盐玻璃,研究了玻璃形成能力、热膨胀系数和抗潮解等性能.结果表明,MoO3-V2O5-P2O5-Fe2O3系统具有较宽的玻璃形成区和较强的玻璃形成能力,当MoO3/V2O5≈1.5时,玻璃形成能力最强. MoO3-V2O5-P2O5-Fe2O3玻璃的热膨胀系数约为60-110×10-7/℃,并且随着Fe2O3含量的增加而逐渐增大.加入适量的Fe2O3能够显著改善MoO3-V2O5-P2O5玻璃的抗潮解性能,在90℃的去离子水中的溶解速率达到8.0×10-9g·cm-2·min-1.
Glasses in the MoO3-V2O5-P2O5-Fe2O3 quaternary system were prepared as potential replacements to lead-based frits for low
temperature sealing applications. The glass forming regions were explored and the glass forming ability, thermal expansion,
and water durability were investigated. Results show that MoO3-V2O5-P2O5 ternary system has strong glass forming ability, which extended down to
10mol% P2O5. The glass forming region in the MoO3-V2O5-P2O5-Fe2O3 quaternary system becomes relatively wider while the stabilities of the
glasses against crystallization are still strong with 10mol% Fe2O3. With the increasing content of Fe2O3 the glass forming region
becomes smaller. The glass forming ability in this quaternary system is most strong as the ratio of MoO3/V2O5 equals to 1.5.
The thermal expansion coefficient can be increased and the water durability improved by adding Fe2O3 content into the MoO3-V2O5-P2O5
ternary system. Trivalence iron ions can enter into phosphate chain and form Fe-O-P bond in place of P=O double bond, hereby increase the water durability
of glasses. Many glass compositions in the system of MoO3-V2O5-P2O5-Fe2O3 have a thermal expansion coefficient of 60～110×10-7/℃
and a dissolution rate in deionized water at 90℃ of 8.0×10-9g·cm-2·min-1, which willbe a good alternative to lead-based sealing frits.
参考文献
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| [2] | Hudecek C J. Engineered Materials Handbook. ASM International, 1991, 4: 1069. [2] Morena T. Journal of Non-Crystalline Solids, 2000, 263\& |
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