Processing apparatuses and methods of using

Patent metadata

Field	Value
Publication number	US-12533869-B2
Application number	US-202519078154-A
Country	US
Kind code	B2
Filing date	Mar 12, 2025
Priority date	Sep 14, 2022
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

Set forth herein are processes for making sintered bilayers and sintered bilayers made by such processes. The process includes rapidly sintering thin bilayers that comprise a green body layer on a metal layer in order to produce bilayers that have a sintered oxide layer on a metal layer.

First claim

What is claimed is:

1 . A process for making a sintered bilayer, comprising:
providing a green bilayer, comprising a green body layer and a metal layer, under tension of 1 N to 300 N per meter of web width; moving the green bilayer through a first heating zone to produce a debindered bilayer; moving the debindered bilayer through a second heating zone to prepare a sintered bilayer; wherein the debindered bilayer is in an arched configuration as the debindered bilayer moves through the second heating zone; wherein the debindered bilayer is in the second heating zone for about 1 second to about 3 minutes; wherein the tension is from 31.1 N to 187.5 N per meter of web width in the second heating zone; wherein the temperature in the second heating zone is 1050° C. to 1250° C.; and wherein the thickness of the sintered bilayer is less than 100 μm.

2 . The process of claim 1 , wherein the green bilayer is under tension of 1 N to 300 N in the first heating zone.

3 . The process of claim 1 , wherein the tension in the first heating zone is different than the tension in the second heating zone.

4 . The process of claim 1 , wherein the tension in the first heating zone is lower than the tension in the second heating zone.

5 . The process of claim 1 , wherein the tension is 3 N to 35 N per meter of web width in the first heating zone.

6 . The process of claim 1 , wherein the tension is 3 N to 30 N per meter of web width in the first heating zone.

7 . The process of claim 1 , wherein the tension is 10 N to 20 N per meter of web width in the first heating zone.

8 . The process of claim 1 , wherein the sintered bilayer comprises sintered lithium-stuffed garnet.

9 . The process of claim 1 , wherein the metal layer comprises nickel, iron, or an alloy thereof.

10 . The process of claim 1 , wherein the thickness of the metal layer is 1 μm to 10 μm.

11 . The process of claim 8 , wherein the thickness of the sintered lithium-stuffed garnet layer is 5 μm to 40 μm.

12 . The process of claim 1 , wherein the sintered bilayer length is at least 1 meter.

13 . The process of claim 1 , wherein debindered bilayer is in an arched configuration characterized by a radius of curvature of 0.5 meters to 6.0 meters.

14 . The process of claim 1 , wherein at least one runway provides the arched configuration.

15 . The process of claim 1 , wherein at least one roller provides the arched configuration.

16 . The process of claim 1 , wherein at least one speed bump provides the arched configuration.

17 . The process of claim 1 , wherein the debindered bilayer is heated at a rate higher than 300° C./min.

18 . A sintered bilayer with an average roughness of less than 15 as measured by Keyence microscopy, wherein the sintered bilayer is made by a process comprising:
providing a green bilayer, comprising a green body layer and a metal layer, under tension of 1 N to 300 N per meter of web width; moving the green bilayer through a first heating zone to produce a debindered bilayer; moving the debindered bilayer through a second heating zone to prepare a sintered bilayer; wherein the debindered bilayer is in an arched configuration as the debindered bilayer moves through the second heating zone; wherein the debindered bilayer is in the second heating zone for about 1 second to about 3 minutes; wherein the tension is from 31.1 N to 187.5 N per meter of web width in the second heating zone; wherein the temperature in the second heating zone is 1050° C. to 1250° C.; and wherein the thickness of the sintered bilayer is less than 100 μm.

19 . The process of claim 1 , wherein the debindered bilayer moves through the second heating zone at a rate from 10 cm/min to 80 cm/min.

20 . The process of claim 19 , wherein the rate is from 20 cm/min to 80 cm/min.

Assignees

• Quantumscape Battery Inc

Inventors

• Berkstresser David
• Broganer Lucas
• Holme Timothy
• Olenick John
• Ramaswamy Murugan
• Samir Tugrul
• Sheffield Matthew
• Stimson Brad
• Winterkorn Martin
• Zhou Yi
• Ramanathan Rishi
• Friedland Jordan
• Parejiya Anand

Classifications

• B32B2315/02

  Ceramics · CPC title

• B32B2311/30

  Iron, e.g. steel · CPC title

• B32B2311/22

  Nickel or cobalt · CPC title

• B32B2307/7376

  Thickness · CPC title

• B32B2250/02

  2 layers · CPC title