公开(公告)号：US20240101483A1

公开(公告)日：2024-03-28

申请号：US18272756

申请日：2022-01-19

Applicant: TOSOH CORPORATION

Inventor： Sho AZECHI ,  Yuki USHIO ,  Takahiro SHIMIZU ,  Yuya HIGUCHI ,  Hitoshi NAGAYAMA ,  Hiroyuki FUJISAKI ,  Kenji IMAI ,  Risa KAWASHIMA

IPC: C04B35/488 ,  A61C13/08 ,  A61C13/083 ,  A61K6/818 ,  C04B35/64

CPC classification number: C04B35/4885 ,  A61C13/082 ,  A61C13/083 ,  A61K6/818 ,  C04B35/64 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3246 ,  C04B2235/444 ,  C04B2235/5409 ,  C04B2235/725 ,  C04B2235/9661

Abstract: To provide at least one of: a powder composition from which a calcined body with similar processability can be produced without requiring the application of different forming conditions and calcination conditions for each composition; a method for producing the powder composition; a calcined body produced from the powder composition; a method for producing the calcined body; and uses thereof.
A powder composition including: two or more types of zirconia in which a lanthanoid rare-earth element is dissolved; a transition metal element other than zirconium and hafnium; and a remainder composed of zirconia stabilized only by one or more selected from the group consisting of yttrium, calcium and magnesium, wherein a different lanthanoid rare-earth element is dissolved in each zirconia in which the lanthanoid rare-earth element is dissolved, and a transition metal element content is 1500 ppm or less.

公开(公告)号：US20240376012A1

公开(公告)日：2024-11-14

申请号：US18691559

申请日：2022-09-15

Applicant: TOSOH CORPORATION

Inventor： Sho AZECHI ,  Yuya HIGUCHI ,  Hiroyuki FUJISAKI ,  Hitoshi NAGAYAMA ,  Kiyotaka KAWAMURA

IPC: C04B35/488 ,  C04B35/64

Abstract: Provided is a powder composition that includes, as a matrix, a zirconia having a high content of a stabilizing element and that can provide, through short-time sintering, a sintered body satisfying translucency and mechanical strength required for dental prosthetic materials, in particular, prosthetic anterior teeth. Provided is a powder composition including two or more stabilized zirconias having different contents of a stabilizing element, in which the powder composition has a content of the stabilizing element of more than 4.0 mol % and 5.8 mol % or less, a rate of change in thermal shrinkage rate per unit temperature at 1,300° C. is 0.07% C−1 or less, and the contents of the stabilizing element of the stabilized zirconias are each 8.0 mol % or less.

公开(公告)号：US20240217881A1

公开(公告)日：2024-07-04

申请号：US18288202

申请日：2022-04-25

Applicant: TOSOH CORPORATION

Inventor： Yuki USHIO ,  Hiroyuki FUJISAKI ,  Yuya HIGUCHI ,  Hitoshi NAGAYAMA

IPC: C04B35/488 ,  C04B35/645 ,  C04B41/00

CPC classification number: C04B35/4885 ,  C04B35/645 ,  C04B41/0072 ,  C04B2235/3217 ,  C04B2235/3246 ,  C04B2235/6567 ,  C04B2235/6583 ,  C04B2235/786 ,  C04B2235/9661

Abstract: Provided is a method for manufacturing a sintered body that uses atmospheric pressure sintering in an atmospheric atmosphere and allows the time required for sintering to be reduced.
The method for manufacturing the sintered body includes subjecting a sintered body of zirconia containing a coloring element to heat treatment at 600° C. or higher and 1200° C. or lower.