发明申请
WO2021198302A1 PROCÉDÉ D'OBTENTION D'UN FERRITE SPINELLE DE NICKEL ZINC COBALT SOUS FORME CÉRAMIQUE
审中-公开
基本信息:
- 专利标题： PROCÉDÉ D'OBTENTION D'UN FERRITE SPINELLE DE NICKEL ZINC COBALT SOUS FORME CÉRAMIQUE
- 专利标题（英）：METHOD FOR PRODUCING A NICKEL ZINC COBALT SPINEL FERRITE IN CERAMIC FORM
- 申请号：PCT/EP2021/058371 申请日：2021-03-30
- 公开(公告)号：WO2021198302A1 公开(公告)日：2021-10-07
- 发明人： MATTEI, Jean-Luc , SOURIOU, David
- 申请人： UNIVERSITÉ BREST BRETAGNE OCCIDENTALE
- 申请人地址： 3 rue des Archives
- 专利权人： UNIVERSITÉ BREST BRETAGNE OCCIDENTALE
- 当前专利权人： UNIVERSITÉ BREST BRETAGNE OCCIDENTALE
- 当前专利权人地址： 3 rue des Archives
- 代理机构： SANTARELLI
- 优先权： FRFR2003212 2020-03-31
- 主分类号： C04B35/26
- IPC分类号： C04B35/26 ; C04B2235/3275 ; C04B2235/3279 ; C04B2235/3284 ; C04B2235/441 ; C04B2235/444 ; C04B2235/6562 ; C04B2235/6565 ; C04B35/265 ; C04B35/2666
The invention relates to a method for producing a nickel zinc cobalt spinel ferrite in ceramic form, comprising the steps of obtaining (1) a precipitate of iron, nickel, zinc and cobalt hydroxides by co-precipitation, rinsing (2) the precipitate, drying and grinding (3) the rinsed precipitate so as to produce a powder, shaping (4) into a compact by pressing the powder, and sintering (5) the compact. The sintering (5) step comprises a gradual increase in temperature at a rate of 2°C to 4°C per minute, from an ambient temperature to a maximum temperature between 950°C and 1,010°C, maintaining the maximum temperature for between forty-five minutes and three hours, and a gradual decrease in temperature at a rate of 2°C to 4°C per minute back to ambient temperature. Said steps, and in particular the sintering step, make it possible to obtain a material that is particularly well suited for the manufacture of an antenna intended for frequencies below one gigahertz.