METHOD OF PRODUCING PARAMETRIC SERIES FERRITE MATERIAL OF LITHIUM FERROSPINEL FOR MICROWAVE ELECTRONICS
	PASHKOV A N; POLOZOV D N; ALEKSEEV A A; NALOGIN A G; TODOSECHUK I I; DEMSHEVSKII V V
	2023-11-16
专利权人	ISTOK SCI & PROD ENTERPRISE STOCK (ISTO-Non-standard)
申请日期	2023-11-16
专利号	RU2823960-C1
成果简介	NOVELTY - Invention relates to production of parametric ferrite materials of lithium ferrospinel for microwave electronic equipment. Charge is prepared in two stages: at the first one prepares part of charge containing Fe2O3, Li2CO3, MnCO3 and ZnO with subsequent calcination of this part of mixture at 930–970 °C for (36.0–39.6)·103 s. At the second stage, Bi2O3 is added to said part of the mixture in amount of 2–4 wt.% of the total composition of the mixture of ferrite material and binder and mixed in a ball mill using balls from high-carbon, wear-resistant steel with diameter of 8–14 mm at ratio of mixture of oxides of ferrite material, binder and balls 46:29:25 wt.%, respectively, for (79.2–86.4)·103 s. Prior to forming the workpiece, the charge is fore-evacuated for (0.9–1.2)·103 s to viscosity of 4.5–8.0 Pa·s. At least one tape of given thickness is formed by slip casting on a carrier from polyethylene terephthalate moving along the thermal zone at rate of (6.3–7.0)·10−3 m/s with simultaneous, uniform temperature rise to 70–75 °C. Obtained tape is sintered by heating in an oxidizing medium at a rate of temperature rise of not more than 15.0·10−3 °C/s to temperature of 440–460 °C, holding at this temperature for not more than 10.0·103 s with subsequent temperature rise at rate of (42.0–55.0)·10−3 °C/s to a temperature equal to 0.8 of temperature in range of 1,000–1,100 °C, holding at this temperature for (7.2–7.5)·103 s and cooling at a rate of not more than 27.0·10−3 °C/s, at pressure (1.0–1.2)·105 Pa. USE - Powder metallurgy. ADVANTAGE - Lower sintering temperature, higher efficiency, expanded performances, expanded functionality, ensuring specified values of electromagnetic parameters. 3 cl, 2 dwg, 1 tbl, 5 ex
IPC 分类号	B22F-003/12 ; H01F-001/34
国家	俄罗斯
专业领域	材料科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/19266
专题	中国科学院新疆生态与地理研究所
作者单位	ISTOK SCI & PROD ENTERPRISE STOCK (ISTO-Non-standard)
推荐引用方式 GB/T 7714	PASHKOV A N,POLOZOV D N,ALEKSEEV A A,et al. METHOD OF PRODUCING PARAMETRIC SERIES FERRITE MATERIAL OF LITHIUM FERROSPINEL FOR MICROWAVE ELECTRONICS. RU2823960-C1[P]. 2023.

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