公开(公告)号：WO2022212437A1

公开(公告)日：2022-10-06

申请号：PCT/US2022/022442

申请日：2022-03-30

Applicant: CORNING INCORPORATED

Inventor： CONWAY, Bethany Rose ,  FORCE, Robin May ,  SUTHERLAND, James Scott ,  ZIMMERMANN, James William

IPC: B28B3/02 ,  B28B7/16 ,  B28B7/34 ,  C04B35/645 ,  B28B1/26 ,  B28B7/38 ,  B28B11/24 ,  C04B35/638 ,  B28B1/004 ,  B28B1/265 ,  B28B11/243 ,  B28B3/003 ,  B28B3/021 ,  B28B3/025 ,  B28B7/0097 ,  B28B7/10 ,  B28B7/164 ,  B28B7/342 ,  C04B2235/383 ,  C04B2235/602 ,  C04B2235/6028 ,  C04B2235/668 ,  C04B2235/77 ,  C04B2235/775 ,  C04B2235/945 ,  C04B2235/9623 ,  C04B35/5755 ,  C04B35/6268 ,  C04B35/62802 ,  C04B35/634 ,  C04B35/63476

Abstract: The disclosure relates to methods of fabricating ceramic structures, and more particularly to methods of fabricating ceramic structures (100) having profiled surfaces and more particularly to methods of fabrication of ceramic mirror blanks. In one embodiment, a method of forming a shaped ceramic article, includes: forming (202), via one of a cold-pressing process (202A - 202E) or pressure casting process, a green pressed body (314) comprising a first surface (104), an opposing second surface (108) and at least one high aspect ratio feature (106) shaped into at least one surface; heating (204) the green featured body (314) to form a debound featured ceramic part (600); and densifying (206) the debound featured ceramic part (600) via one of a pressureless sintering process or a hot-pressing process (206A - 206F).

公开(公告)号：WO2022072705A2

公开(公告)日：2022-04-07

申请号：PCT/US2021/052981

申请日：2021-09-30

Applicant: HERAEUS CONAMIC NORTH AMERICA LLC

Inventor： WALKER, Luke ,  DONELON, Matthew, Joseph ,  THOMPSON, Lillian

IPC: B28B3/02 ,  B22F3/14 ,  B28B3/08 ,  B28B11/24 ,  B30B11/04 ,  C04B35/645 ,  B28B11/243 ,  B28B3/025 ,  B28B3/086 ,  B30B11/027 ,  B30B15/022 ,  B32B18/00 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3244 ,  C04B2235/5418 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/5463 ,  C04B2235/5481 ,  C04B2235/608 ,  C04B2235/6562 ,  C04B2235/6567 ,  C04B2235/6581 ,  C04B2235/662 ,  C04B2235/666 ,  C04B2235/72 ,  C04B2235/763 ,  C04B2235/764 ,  C04B2235/768 ,  C04B2235/77 ,  C04B2235/775 ,  C04B2235/782 ,  C04B2235/784 ,  C04B2235/786 ,  C04B2235/95 ,  C04B2235/96 ,  C04B2235/963 ,  C04B2237/34 ,  C04B2237/343 ,  C04B35/119 ,  C04B35/185 ,  C04B35/195 ,  C04B35/44 ,  C04B35/443 ,  C04B35/50 ,  C04B35/505 ,  C04B35/581 ,  C04B35/6263 ,  C04B41/009 ,  C04B41/5346 ,  C04B41/91

Abstract: A method of making a sintered ceramic body comprising the steps of disposing a ceramic powder (5) inside an inner volume of a spark plasma sintering tool (1), wherein the tool comprises: a die (2) comprising a sidewall comprising inner and outer walls, wherein the inner wall has a diameter defining the inner volume; upper and lower punches (4,4') operably coupled with the die, wherein each of the punches have an outer wall defining a diameter less than the diameter of the die inner wall, thereby creating a gap (3) between the punches and the inner wall when at least one of the punches are moved within the inner volume, and the gap is from 10 μm to 70 μm wide; creating vacuum conditions inside the inner volume; moving at least one of the punches to apply pressure to the ceramic powder while heating, and sintering; and lowering the temperature of the sintered body.

公开(公告)号：WO2021128538A1

公开(公告)日：2021-07-01

申请号：PCT/CN2020/074402

申请日：2020-02-06

Applicant: 青岛理工大学 ,  沈阳宏扬精密陶瓷有限责任公司

Inventor： 李长河 ,  石明村 ,  马向阳 ,  张彦彬 ,  杨敏 ,  崔歆 ,  马晓红 ,  高腾 ,  王晓铭 ,  侯亚丽 ,  翟涵 ,  王珍 ,  卢秉恒 ,  曹华军 ,  张乃庆 ,  吴启东

IPC: B28B3/02 ,  B28B13/0235 ,  B28B17/0081 ,  B28B3/025

Abstract: 本发明公开了一种氧化铝陶瓷一体化热压成型机及工作方法，包括固定于机架的压紧装置、热压装置，所述热压装置位于压紧装置下方，热压装置内部设有搅拌装置，热压装置上方设有热压模具；所述压紧装置将一路高压气体作用于热压模具，将另一路高压气体进入热压装置使得浆料流入热压模具型腔内部；所述搅拌装置对热压装置内部浆料搅拌，使氧化铝胚料在浆料中分布更加均匀；所述热压装置内部分别设置有检测内部油液温度及出浆口浆料温度的测温元件，根据测温元件检测的温度，实时调控电加热装置功率，达到精确控温的目的。本公开通过模具及加热装置，使温度场分布趋于合理，可以精准控制浆料温度，明显提高加热效率，氧化铝粉末在液态石蜡中的分布可以显著提升铸件成型质量。