Patent ID: 11918958
Assignee: AT&M ENVIRONMENTAL ENGINEERING TECHNOLOGY CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 3:
4. The preparation method according to claim 1, wherein the Fe—Al-based metal powder is a Fe3Al powder, and a raw material ratio of the Fe—Al-based metal powder, the Al powder and the metal fiber powder is adjusted to 30:1:1; and
during treatments in the sintering furnace, a first stage is heating up to 280-320° C. and then retaining temperature for 2 h, a second stage is heating up to below 450° C. and then retaining temperature for 2 h, a third stage is slow heating up to 650-730° C. and then retaining temperature for 1 h, and a fourth stage is continuing slow heating up to 1300° C.