Abstract: A method for manufacturing a three-dimensionally shaped product, capable of obtaining a three-dimensionally shaped product having a sufficient mechanical strength without reduction in a shaping speed. A method for manufacturing a three-dimensionally shaped product includes a step of preparing a fiber sheet having a predetermined shape, a step of applying a three dimensional shaping composition to the fiber sheet, and a step of solidifying the three dimensional shaping composition applied to the fiber sheet.

Abstract: Provided is an abrasive agent for substrates that includes, as an abrasive material component in the abrasive agent, cerium oxide as the main component. The abrasive agent for substrates includes soluble silica and cerium oxide. The concentration ratio of the soluble silica, calculated as Si content, and the cerium oxide in the abrasive agent is 0.001:1 to 0.1:1.

Abstract: Provided is a method for manufacturing an abrasive agent including a dispersant and also including cerium oxide as a main abrasive material component. The method involves: a step for recovering an abrasive agent component by salting out a spent abrasive material slurry by using a cation of an element of the first Group or second Group with an ionic radius of 80 pm to 160 pm in six-coordinate conversion, and solid-liquid separating the cerium oxide by coagulation and sedimentation; and a step for adding a dispersant including an anionic polymer to the abrasive agent component after the recovery.

Abstract: For the purpose of providing a glass substrate for an information recording medium capable of acquiring a low GA value, provided is the glass substrate for an information recording medium, wherein a surface of the glass substrate has an arithmetic mean undulation Wa of less than 0.6 nm, and a fine undulation having a root-mean-square height Rq of less than 0.01 nm at a measurement wavelength of 80-120?m in a radial direction.

Abstract: Disclosed is a method of producing a glass substrate for an information recording medium including a precision polishing step of using a polishing material containing colloidal silica and performing precision polishing, under acidic conditions, on a glass material in which the amount of iron adhered on the surface is 0.5 ng/cm2 or less and the surface roughness Ra is 1 nm or less. Additionally disclosed is a glass substrate for an information recording medium produced by the foregoing method of producing a glass substrate for an information recording medium.

Abstract: Provided is a method for manufacturing an abrasive agent including a dispersant and also including cerium oxide as a main abrasive material component. The method involves: a step for recovering an abrasive agent component by salting out a spent abrasive material slurry by using a cation of an element of the first Group or second Group with an ionic radius of 80 pm to 160 pm in six-coordinate conversion, and solid-liquid separating the cerium oxide by coagulation and sedimentation; and a step for adding a dispersant including an anionic polymer to the abrasive agent component after the recovery.

Abstract: Disclosed is a method of producing a glass substrate for an information recording medium including a rough polishing step of performing a rough polishing on a glass material containing 0.01 to 2 mass % of cerium oxide; a washing step of washing the glass material after the rough polishing step, so that the cerium content of the glass material surface becomes 0.125 ng/cm2 or less; and a precision polishing step of performing precision polishing on the glass material after the washing step by cyclically using a polishing material containing colloidal silica.

Abstract: For an information storage medium a glass substrate is produced in a method including the steps of: polishing a glass substrate with a polishing agent applied thereon; and subsequently, chemically strengthening a major surface of the glass substrate. The polishing agent contains cerium oxide at a purity equal to or larger than 99% by mass for CeO2/TREO, and has an alkaline earth metal content having a total mass equal to or smaller than 10 ppm by mass. The step of polishing is performed with a soft polishing pad to polish the glass substrate.

Abstract: Provided is an abrasive agent for substrates that includes, as an abrasive material component in the abrasive agent, cerium oxide as the main component. The abrasive agent for substrates includes soluble silica and cerium oxide. The concentration ratio of the soluble silica, calculated as Si content, and the cerium oxide in the abrasive agent is 0.001:1 to 0.1:1.

Abstract: According to the process for producing a glass substrate for an information-recording medium of the present invention, a glass plate 10 is roughly polished by a polishing machine 1 using a polishing liquid 7 containing a polishing agent containing cerium oxide as a main component in the rough polishing step, followed by cleaning so as to adjust the amount of cerium oxide on the surface of the glass plate to be 0.125 ng/cm2 or less. The glass plate after rough polishing is thereafter finely polished with a polishing agent containing colloidal silica in the fine polishing step.

Abstract: An aspect of the invention is directed to a method for manufacturing a glass substrate for an information recording medium including: a polishing step of polishing a surface of a raw glass plate, with use of a polishing solution containing a polishing agent and water; and a chemically reinforcing step of reinforcing the polished surface of the raw glass plate which has undergone the polishing step, with use of a chemically reinforcing treatment solution. The polishing step is a step of using, as the polishing agent, a polishing agent containing CeO2, and of performing polishing in such a manner that the effective amount of CeO2 per unit area of the surface of the raw glass plate to be used in the polishing is in the range of from 0.05 to 0.5 ?g/cm2.

Abstract: For an information storage medium a glass substrate is produced in a method including the steps of: polishing a glass substrate with a polishing agent applied thereon; and subsequently, chemically strengthening a major surface of the glass substrate. The polishing agent contains cerium oxide at a purity equal to or larger than 99% by mass for CeO2/TREO, and has an alkaline earth metal content having a total mass equal to or smaller than 10 ppm by mass. The step of polishing is performed with a soft polishing pad to polish the glass substrate.

Abstract: According to the process for producing a glass substrate for an information-recording medium of the present invention, a glass plate 10 is roughly polished by a polishing machine 1 using a polishing liquid 7 containing a polishing agent containing cerium oxide as a main component in the rough polishing step, followed by cleaning so as to adjust the amount of cerium oxide on the surface of the glass plate to be 0.125 ng/cm2 or less. The glass plate after rough polishing is thereafter finely polished with a polishing agent containing colloidal silica in the fine polishing step.

Abstract: Disclosed is a method of producing a glass substrate for an information recording medium including a rough polishing step of performing a rough polishing on a glass material containing 0.01 to 2 mass % of cerium oxide; a washing step of washing the glass material after the rough polishing step, so that the cerium content of the glass material surface becomes 0.125 ng/cm2 or less; and a precision polishing step of performing precision polishing on the glass material after the washing step by cyclically using a polishing material containing colloidal silica.

Abstract: Disclosed is a method of producing a glass substrate for an information recording medium including a precision polishing step of using a polishing material containing colloidal silica and performing precision polishing, under acidic conditions, on a glass material in which the amount of iron adhered on the surface is 0.5 ng/cm2 or less and the surface roughness Ra is 1 nm or less. Additionally disclosed is a glass substrate for an information recording medium produced by the foregoing method of producing a glass substrate for an information recording medium.

Abstract: For the purpose of providing a glass substrate for an information recording medium capable of acquiring a low GA value, provided is the glass substrate for an information recording medium, wherein a surface of the glass substrate has an arithmetic mean undulation Wa of less than 0.6 nm, and a fine undulation having a root-mean-square height Rq of less than 0.01 nm at a measurement wavelength of 80-120 ?m in a radial direction.