Multifunctional energy efficient window coating

• US 20030054177A1
• Filed: 03/20/2002
• Published: 03/20/2003
• Est. Priority Date: 09/20/2001
• Status: Abandoned Application

• Current Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan)
• Original Assignee: National Institute of ADV Industrial SCI and Tech
• Inventors: Jin, Ping
• Application Number:
  US10/101,360
• Publication Number:
  US 20030054177A1
• Time in Patent Office: Days
• US Class Current: 428/432
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 17/3423 at least one of the coatings comprising a suboxide
• CPC Class Codes: C03C 2217/71 Photocatalytic coatings
• CPC Class Codes: G02F 1/0147 based on thermo-optic effects G02F1/132 takes precedence

Abstract

The present invention provides a multifunctional high-performance automatic chromogenic window coating material in which a vanadium dioxide based thermochromic material is coated by sputtering or the like onto a transparent substrate such as a piece of window glass, and a titanium dioxide based photocatalytic material that also acts as an antireflection film is coated thereon as an outermost layer.

Claims

1. A high-performance automatic chromogenic window coating material, comprising:

a vanadium dioxide based thermochromic material coated onto a transparent substrate; and

a titanium dioxide based photocatalytic thin film coated thereon as an outermost layer.

2. The material according to claim 1, wherein said vanadium dioxide based thermochromic material comprises vanadium dioxide, or vanadium dioxide having a metallic element added thereto, or vanadium dioxide having a nonmetal added thereto, and has an automatic thermochoromic function in accordance with changes in environmental temperature.

3. The material according to claim 1, wherein a titanium dioxide thin film that also acts as an antireflection film is coated on as an outermost layer, which has a property of always maintaining transparency and a high luminous transmittance.

4. The material according to claim 1, wherein the material has various photocatalytic functions of titanium dioxide and an ultraviolet ray cutting function.