Carbon composite composition and carbon heater manufactured using the same

Patent metadata

Field	Value
Publication number	US-11097985-B2
Application number	US-201815975348-A
Country	US
Kind code	B2
Filing date	May 9, 2018
Priority date	May 10, 2017
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A carbon composite composition and a carbon heater are provided. The carbon composite composition may include a phenolic resin as a binder, a lubricant, and a base material that determines a specific resistance of a resistance heating element at a high temperature. The carbon composite composition may prevent a dielectric breakdown, a spark and plasma from occurring in a carbon heater, and may improve radiation efficiency of the carbon heater.

First claim

What is claimed is:

1. A carbon composite composition, comprising:
a binder comprising a phenolic resin;
a lubricant;
a base material consisting of silicon carbide (SiC), the base material determining a specific resistance of a resistance heating element at a high temperature, wherein the SiC is present in an amount of 50 to 70%, based on a total weight of the composition; and
a specific resistance controlling agent comprising silicon oxide (SiO 2 ).

2. The carbon composite composition according to claim 1 , wherein the SiO 2 is present in an amount of 24 wt. % or less, based on the total weight of the composition.

3. The carbon composite composition according to claim 1 , wherein the phenolic resin is a novolac resin.

4. The carbon composite composition according to claim 3 , wherein the novolac resin is present in an amount of 15 to 30 wt. %, based on the total weight of the composition.

5. The carbon composite composition according to claim 1 , wherein the composition does not comprise a curing agent of hexamine for curing the phenolic resin.

6. The carbon composite composition according to claim 5 , wherein the lubricant acts as a curing agent of the phenolic resin.

7. The carbon composite composition according to claim 6 , wherein the lubricant is graphite.

8. The carbon composite composition according to claim 7 , wherein the graphite is present in an amount of 0.1 to 10 wt. %, based on the total weight of the composition.

9. A carbon composite composition, comprising:
a binder comprising a novolac resin;
a lubricant comprising graphite; and
a base material consisting of silicon carbide (SiC), the base material determining a specific resistance of a resistance heating element at a high temperature, wherein the SiC is present in an amount of 50 to 70%, based on a total weight of the composition; and
a specific resistance controlling agent comprising silicon oxide (SiO 2 ).

10. The carbon composite composition according to claim 9 , wherein the novolac resin is present in an amount of 15 to 30 wt. %; and the graphite is present in an amount of 0.1 to 10 wt. %, based on the total weight of the composition.

11. The carbon composite composition according to claim 9 , wherein the composition does not comprise a curing agent of hexamine for curing the phenolic resin.

12. The composite for carbon composite according to claim 9 , wherein the SiO 2 is present in an amount of 24 wt. % or less, based on the total weight of the carbon composite composition.

13. A carbon heater comprising the composition of claim 1 .

14. A carbon heater comprising the composition of claim 9 .

Assignees

• Lg Electronics Inc
• Univ Nat Chonnam Ind Found

Inventors

• Lee Youngjun
• Yang Kap Seung
• Kim Sang Wan

Classifications

• C08L61/06

  of aldehydes with phenols · CPC title

• C04B2235/3826

  Silicon carbides · CPC title

• C04B2235/3418

  Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint · CPC title

• H05B3/148

  Silicon, e.g. silicon carbide, magnesium silicide, heating transistors or diodes · CPC title

• C04B2235/425

  Graphite · CPC title