Porous plate-shaped filler, heat insulation film, and method for producing porous plate-shaped filler

Patent metadata

Field	Value
Publication number	US-10317004-B2
Application number	US-201615284798-A
Country	US
Kind code	B2
Filing date	Oct 4, 2016
Priority date	Apr 17, 2014
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A porous plate-shaped filler is a plate shape having an aspect ratio of 3 or more, and has a minimum length of 0.1 to 50 μm and a porosity of 20 to 90%. Furthermore, the porous plate-shaped filler 1 includes plate-shaped pores 2 having an aspect ratio of 1.5 or more. Consequently, in the porous plate-shaped filler, a thermal conductivity is low. The heat insulation film includes the porous plate-shaped filler, whereby a heat insulation effect of the heat insulation film can improve.

First claim

The invention claimed is:

1. A porous plate-shaped filler which is a plate shape having a length to thickness aspect ratio of 3 or more, has a thickness of 0.1 to 50 μm and a porosity of 20 to 90%, and
includes plate-shaped pores having an aspect ratio of 1.5 or more.

2. The porous plate-shaped filler according to claim 1 ,
wherein in a cross section in the thickness direction of the porous plate-shaped filler, an average of angles between directions of thicknesses of the pores and the thickness direction of the porous plate-shaped filler is 45° or less.

3. The porous plate-shaped filler according to claim 1 ,
wherein a thermal conductivity in the thickness direction of the porous plate-shaped filler is 1 W/(m·K) or less.

4. A heat insulation film which includes the porous plate-shaped filler according to claim 1 .

5. The heat insulation film according to claim 4 , wherein the thermal conductivity in a thickness direction is 1.5 W/(m·K) or less.

6. A method for producing the porous plate-shaped filler according to claim 1 , which comprises: preparing a slurry including a plate-shaped pore former having an aspect ratio of 1.5 or more; and firing the pore former to produce the porous plate-shaped filler including the plate-shaped pores having an aspect ratio of 1.5 or more.

7. The method for producing the porous plate-shaped filler according to claim 6 , wherein a viscosity of the slurry is from 100 to 90000 cps.

Assignees

• Ngk Insulators Ltd

Inventors

• Kobayashi Hiroharu
• Tomita Takahiro
• Oribe Akinobu

Classifications

• C09C1/407

  Aluminium oxides or hydroxides · CPC title

• C09C3/10

  Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)} · CPC title

• C04B38/00

  Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof (treating slag with gases or gas generating material C04B5/06 {; expanded graphite C04B35/536}) · CPC title

• C01P2004/24

  Nanoplates, i.e. plate-like particles with a thickness from 1-100 nanometer · CPC title

• C09C1/3607

  Titanium dioxide · CPC title