Composition, and resistance heating element

Patent metadata

Field	Value
Publication number	US-2025129450-A1
Application number	US-202418966564-A
Country	US
Kind code	A1
Filing date	Dec 3, 2024
Priority date	Aug 25, 2022
Publication date	Apr 24, 2025
Grant date	—

Abstract

This composition includes a Ru—Mo—W alloy having, in atomic %, a chemical composition including Mo: greater than 0% and 49% or less and W: greater than 0% and 45% or less, and the total content of Mo and W in the Ru—Mo—W alloy is greater than 30% and less than 50%.

First claim

1 . A specific alloy of a Ru—Mo—W alloy consisting essentially of Ru, Mo, and W, wherein:
in atomic percent,
i) a Mo's content of the Ru—Mo—W alloy is more than 0% and 49% or less;
ii) a W's content of the Ru—Mo—W alloy is more than 0% and 45% or less; and
iii) a total of the Mo's content and the W's content of the Ru—Mo—W alloy is more than 30% and less than 50%.

2 . The specific alloy according to claim 1 , the Ru—Mo—W alloy consisting essentially of Ru, Mo and W, wherein:
in atomic percent,
i) the Mo's content of the Ru—Mo—W alloy is 10% or more and 40% or less;
ii) the W's content of the Ru—Mo—W alloy is 10% or more and 40% or less; and
iii) the total of the Mo's content and the W's content of the Ru—Mo—W alloy is 20% or more and 47% or less.

3 . The specific alloy according to claim 1 ,
wherein the Ru—Mo—W alloy is in powder form or at least in paste form in which the Ru—Mo—W alloy is mixed with at least a solvent.

4 . The specific alloy according to claim 1 , which contains the Ru—Mo—W alloy is a thin film.

5 . A resistance heating element of an Ru—Mo—W alloy consisting essentially of Ru, Mo and W, wherein:
in atomic percent,
i) a Mo's content of the Ru—Mo—W alloy is more than 0% and 49% or less;
ii) a W's content of the Ru—Mo—W alloy is more than 0% and 45% or less; and
iii) a total of the Mo's content and the W's content of the Ru—Mo—W alloy is more than 30% and less than 50%, wherein

an fracture elongation of the Ru—Mo—W alloy is 5% or more.

6 . The resistance heating element according to claim 5 ,
wherein the Ru—Mo—W alloy consisting essentially of Ru, Mo and W, wherein in atomic percent,
i) a Mo's content of the Ru—Mo—W alloy 10% or more and 40% or less;
ii) a W's content of the Ru—Mo—W alloy is 10% or more and 40% or less; and
iii) a total of the Mo's content and the W's content of the Ru—Mo—W alloy is 20% or more and 47% or less, wherein: an fracture elongation of the Ru—Mo—W alloy is 5% or more.

7 . The resistance heating element according to claim 5 ,
wherein the resistance heating element has a linear or rod shape.

8 . A chemical composition of an Ru—Mo—W alloy consisting essentially of Ru, Mo and W, wherein:
in atomic percent,
i) a Mo's content of the Ru—Mo—W alloy is more than 0% and 49% or less;
ii) a W's content of the Ru—Mo—W alloy is more than 0% and 45% or less; and
iii) a total of the Mo's content and the W's content of the Ru—Mo—W alloy is more than 30% and less than 50%, and

the chemical composition further comprises an electrical insulator.

9 . The chemical composition according to claim 8 , the Ru—Mo—W alloy consisting essentially of Ru, Mo and W, wherein:
in atomic percent,
i) a Mo's content of the Ru—Mo—W alloy is more than 10% and 40% or less;
ii) a W's content of the Ru—Mo—W alloy is more than 10% and 40% or less; and
iii) a total of the Mo's content and the W's content of the Ru—Mo—W alloy is more than 20% and 47% or less.

Assignees

• Univ Tohoku
• C&A Corp

Inventors

• Murakami Rikito
• Yoshikawa Akira
• Kamada Kei
• Yamaguchi Hiroaki
• ITOI Shiika
• Shoji Yasuhiro

Classifications

• H05B3/64

  using ribbon, rod, or wire heater · CPC title

• H05B3/12

  characterised by the composition or nature of the conductive material · CPC title

• C22C30/00

  Alloys containing less than 50% by weight of each constituent · CPC title

• C22C5/04 Primary

  Alloys based on a platinum group metal · CPC title

• C22F1/16

  of other metals or alloys based thereon · CPC title