Carbon heating element and method for manufacturing a carbon heating element

• US 11,096,249 B2
• Filed: 05/22/2018
• Issued: 08/17/2021
• Est. Priority Date: 05/26/2017
• Status: Active Grant

• Current Assignee: Industry Foundation Of Chonnam National University (Chonnam National University), LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Youngjun, Yang, Kap Seung, Kim, Sang Wan
• Primary Examiner(s): Pelham, Joseph M.
• Application Number:
  US15/986,107
• Publication Number:
  US 20180343704A1
• Time in Patent Office: 1,183 Days
• Field of Search: None
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 2203/032 Heaters specially adapted for heating by radiation heating
• CPC Class Codes: H05B 3/0076 for cooking, e.g. in ovens lamps specially adapted for non-metallic cooking plates H05B3/742, H05B3/744
• CPC Class Codes: H05B 3/03 Electrodes
• CPC Class Codes: H05B 3/141 Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
• CPC Class Codes: H05B 3/145 Carbon only, e.g. carbon black, graphite
• CPC Class Codes: H05B 3/148 Silicon, e.g. silicon carbide, magnesium silicide, heating transistors or diodes
• CPC Class Codes: H05B 3/44 heating conductor arranged within rods or tubes of insulating material

Abstract

A carbon heating element and a method for manufacturing a carbon heating element are provided. The carbon heating element may efficiently dissipate heat and prevent disconnection or destruction of a heating element to prolong a lifespan thereof without generating a spark and plasma under a high voltage. The carbon heating element may include carbon (C) and silicon carbide (SiC), and the carbon heating element may have a thermal conductivity of 1.6 W/m·K or more.

Claims

1. A heating element for a carbon heater, the heating element substantially consisting of:

carbon (C);

silicon carbide (SiC); and

oxygen(O), wherein a total amount of oxygen in the heating element is 2 wt. % or less, wherein the heating element has a thermal conductivity of 1.6 W/m·

K or more and a specific resistance of the heating element is (11˜

16) *10<sup>−

2</sup> Ω

cm.

2. The heating element according to claim 1, wherein the SiC includes β

-SiC and α

-SiC.

3. The heating element according to claim 1, wherein a degree of crystallization of the SiC in the heating element has a full width at half maximum (FWHM) value of 0.14 as a result of analyzing an X-ray diffraction.

4. The heating element according to claim 1, wherein the heating element includes silicon oxide (SiO₂).

5. The heating element according to claim 1, wherein the heating element is solid.

6. The heating element according to claim 1, wherein the heating element is hollow.