Original scientific paper

Additives in coarse grain alumina ceramics for metallization

Alenka Š. Kosmos ; IEVT, Teslova 30, Ljubljana, Slovenia
Lidija I. Belič ; IEVT, Teslova 30, Ljubljana, Slovenia
Dimitrij Sušnik ; IJS, Jamova 39, Ljubljana, Slovenia

Abstract

The metal to ceramics seals are widely used as permanent seals in high vacuum technology. For these seals a coarse grain alumina ceramics is needed since a high temperature MoMn metallization is often applied because of several advantages, such as high mechanical strength, low dielectric losses at high frequencies and others. The coarse grain ceramics are produced by sintering alumina with different additives which have to promote densification and grain growth with the liquid phase during sintering. The CaO-SiO2 and CaO-MgO-SiO2 systems were used as additives in the present work. Different characteristics of the formed liquid phases have caused similar densification but different grain growth rates.

Keywords

Hrčak ID:

299603

URI

https://hrcak.srce.hr/299603

Publication date:

2.5.1996.

Article data in other languages: croatian

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