Zirconia ceramic as a digital storage media

Details Zirconia ceramic as a digital storage media Zirconia ceramic as a digital storage media

G - Physics

11

B

G11B 7/24 (2006.01) C04B 35/486 (2006.01) G11B 7/243 (2006.01) G11B 7/26 (2006.01)

Patent

CA 2204719

An improved computer type data storage disk is formed using a ceramic material incorporating zirconium oxide mixed with a secondary oxide such as yttria in a range of approximately 0.5 through 5 mol%. The process of forming the ceramic data storage disk comprises the steps of: (a) providing a ceramic powder, comprised of a particulate zirconium oxide and a secondary oxide selected from the group consisting of yttria, magnesia, and calcia wherein the secondary oxide, in the case of yttria or calcia has a range mole percent of about 0.5 to about 5 and if magnesia has a range mole percent of about 0.1 to about 1.0 relative to the total of zirconium oxide; (b) providing a mold for receiving and processing the ceramic powder; (c) compacting the ceramic powder in the mold to form a ceramic disk; (d) sintering the ceramic disk thereby forming a sintered ceramic disk; and (e) further shaping the sintered ceramic disk to form the finished ceramic data storage disk.

Support de données sur disque informatique amélioré, composé d'un matériau céramique associant de l'oxyde de zirconium à un oxyde secondaire tel que l'oxyde d'yttrium dans une proportion d'environ 0,5 à 5 mol%. Le processus de formation du disque en céramique comprend les étapes suivantes : (a) fournir une poudre céramique composée d'un oxyde de zirconium particulaire et d'un oxyde secondaire choisi parmi le groupe oxyde d'yttrium, magnésie et oxyde de calcium, ledit oxyde secondaire ayant, dans le cas de l'oxyde d'yttrium et de l'oxyde de calcium, un pourcentage molaire allant d' environ 0,5 à environ 5 et, dans le cas de la magnésie, d'environ 0,1 à environ 1,0 par rapport au total de l'oxyde de zirconium; (b) fournir un moule pour recevoir et traiter la poudre céramique; (c) compacter la poudre céramique dans le moule pour forme un disque de céramique; (d) fritter ledit disque de céramique pour former un disque de céramique fritté; et (e) façonner le disque fritté sous la forme du produit fini.

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