Glass coating composition, manufacturing method for coated glass using the glass coating composition, and cooking apparatus using the coated glass

Patent metadata

Field	Value
Publication number	US-12246984-B2
Application number	US-202117156852-A
Country	US
Kind code	B2
Filing date	Jan 25, 2021
Priority date	Jan 23, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A glass coating composition may include a glass composition and a nanopowder. The nanopowder may include Zinc Oxide (ZnO) and may be added to a glass composition in 1 to 10 weight (wt %). The glass composition may include 20 to 40 wt % of phosphorus pentoxide (P 2 O 5 ), a total of 15 to 30 wt % of aluminum oxide (Al 2 O 3 ) and zirconium dioxide (ZrO 2 ), a total of 10 to 30 wt % of sodium oxide (Na 2 O) and potassium oxide (K 2 O), 10 to 25 wt % of boron trioxide (B 2 O 3 ), and 10 to 15 wt % of zinc oxide (ZnO).

First claim

What is claimed is:

1. A glass coating composition, comprising:
90 to 99 weight percent (wt %) of a glass composition; and
1 to 10 wt % of a nanopowder added to the glass composition, wherein the glass composition comprises:
20 to 40 wt % of phosphorus pentoxide (P 2 O 5 ), a total of 15 to 30 wt % of aluminum oxide (Al 2 O 3 ) and zirconium dioxide (ZrO 2 ), a total of 10 to 30 wt % of sodium oxide (Na 2 O) and potassium oxide (K 2 O), 10 to 25 wt % of boron trioxide (B 2 O 3 ), and 10 to 15 wt % of zinc oxide (ZnO), wherein the nanopowder comprises at least one of zinc oxide (ZnO), titanium dioxide (TiO 2 ), tin oxide (SnO 2 ), or indium tin oxide (ITO).

2. The glass coating composition of claim 1 , wherein the glass composition further comprises a total of 1 to 10 wt % of at least one of lithium oxide (Li 2 O), barium oxide (BaO), or calcium oxide (CaO).

3. The glass coating composition of claim 1 , wherein only ZnO is added as the nanopowder, and the nanopowder content accounts for 4 to 6 wt % of an entire weight of the glass coating composition.

4. The glass coating composition of claim 1 , wherein an amount of Al 2 O 3 in the glass composition is greater than an amount of ZrO 2 in the glass composition.

5. The glass coating composition of claim 1 , wherein an amount of Na 2 O in the glass composition is greater than an amount of K 2 O in the glass composition.

6. The glass coating composition of claim 1 , wherein the nanopowder has an average particle size of 100 nm or less.

7. A cooking appliance including a glass panel having a coating layer formed using the glass coating composition of claim 1 , the glass panel allowing a user to view inside of the cooking appliance via the glass panel.

8. A cooking apparatus, comprising:
a cavity forming a cooking space therein; and
a door configured to open or close the cooking space, the door including a window having a coating layer provided on a surface of the window, wherein the coating layer is formed using the glass coating composition of claim 1 .

9. The cooking apparatus of claim 8 , wherein, the window provided with the coating layer has a visible light transmittance of at least 80% and a haze of less than 5%.

Assignees

• Lg Electronics Inc
• Nat Univ Kongju Ind Univ Coop Found

Inventors

• Kim Taehee
• Kim Taeho
• Lee Yongsoo
• Chung Woon Jin
• Lee Hansol
• Kim In Gun

Classifications

• C03C8/20

  containing titanium compounds; containing zirconium compounds · CPC title

• C03C8/08

  containing phosphorus · CPC title

• C03C3/21

  containing titanium, zirconium, vanadium, tungsten or molybdenum · CPC title

• C03C2217/477

  Titanium oxide · CPC title

• C03C2217/476

  Tin oxide or doped tin oxide · CPC title