Method for producing glass substrate for magnetic disk, and magnetic disk
Номер патента: MY143755A
Опубликовано: 15-07-2011
Автор(ы): Hiroshi Usui, Iori Yoshida, Katsuaki Miyatani, Kazuo Sunahara, Mitsuru Horie, Osamu Miyahara, Satoshi Kashiwabara, Tomohiro Sakai, Yoshihisa Beppu, Yoshinori Kon, Yuzuru Tanabe
Принадлежит: Asahi Glass Co Ltd
Опубликовано: 15-07-2011
Автор(ы): Hiroshi Usui, Iori Yoshida, Katsuaki Miyatani, Kazuo Sunahara, Mitsuru Horie, Osamu Miyahara, Satoshi Kashiwabara, Tomohiro Sakai, Yoshihisa Beppu, Yoshinori Kon, Yuzuru Tanabe
Принадлежит: Asahi Glass Co Ltd
Реферат: A METHOD FOR PRODUCING A GLASS SUBSTRATE FOR A MAGNETIC DISK BY POLISHING A CIRCULAR GLASS PLATE, WHICH COMPRISES A STEP OF POLISHING THE PRINCIPAL PLANE OF THE CIRCULAR GLASS PLATE BY USING A SLURRY CONTAINING A CEO2 CRYSTAL POWDER, THE CEO2 CRYSTAL POWDER BEING OBTAINED IN SUCH A MANNER THAT A MELT CONTAINING CE(2 IS QUENCHED TO OBTAIN AN AMORPHOUS MATERIAL, AND THE AMORPHOUS MATERIAL IS SUBJECTED TO HEAT TREATMENT TO OBTAIN A CEO2 CRYSTALS-PRECIPITATED AMORPHOUS MATERIAL, WHICH IS SUBJECTED TO ACID TREATMENT TO SEPARATE AND EXTRACT THE CEO2 CRYSTAL POWDER FROM THE CEO2 CRYSTALS-PRECIPITATED AMORPHOUS MATERIAL.
Method for the production of glass substrates for magnetic recording mediums.
Номер патента: MY126084A. Автор: Akio Fujimura,Daisaku Kobayashi. Владелец: Mitsui Mining & Smelting Co. Дата публикации: 2006-09-29.