Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-density manganese-zinc ferrite
The invention discloses a preparation method of high-density manganese-zinc ferrite. The method sequentially comprises the following steps: 1) mixing 50-55 wt% of Fe2O3, 8-10 wt% of ZnO, 35-40 wt% ofMnO and 2-4 wt% of CoO powder, and adding 360 ppm of CaCO3, 220 ppm of SiO2, 480 ppm of Cr2O3 and 530 ppm of Nb2O5 into the mixed material; (2) carrying out primary ball milling, the rotating speed being 1100-1300rpm, and the ball milling time being 45min; (3) carrying out primary sintering, the temperature being controlled to be 880-920 DEG C, the time being 4 hours, heat preservation being conducted for 1 hour, and obtainig a block; 4) crushing the block until the particle size is less than 40 micrometers; (5) carrying out secondary ball milling under the argon atmosphere, the rotating speedbeing 1800-2500 rpm, and the ball milling time being 80 min; and (6) carrying out secondary sintering, wherein hot-pressing sintering is conducted under the vacuum condition, the pressure is 120 MPa,the temperature is controlled to be 1600-1650 DEG C, the time is 8-10 hours, and heat preservation is conducted for 2 hours to obtain the product. The hot-pressing sintering process is optimized, sothat the compactness of the finished product is greatly improved after hot-pressing sintering treatment, the grain structure becomes better, and the magnetic property and mechanical property are improved.
本申请公开了一种高致密锰锌铁氧体的制备方法，依次包括如下步骤：1）按重量百分比将50‑55%Fe2O3、8‑10%ZnO、35‑40%MnO、2‑4%CoO粉末混合，按照混合后的物料加入360ppm CaCO3、220ppm SiO2、480ppm Cr2O3、530ppm Nb2O5；2）一次球磨，转速为1100‑1300rpm，球磨时间为45min；3）一次烧结，控制温度为880‑920℃，时间4小时，保温1小时，得到块体；4）粉碎所述块体至粒径小于40μm；5）二次球磨，在氩气气氛下进行，转速为1800‑2500rpm，球磨时间为80min；6）二次烧结，真空条件下进行热压烧结，压力为120MPa，控制温度为1600‑1650℃，时间8‑10小时，保温2小时，得到产品。本发明优化了热压烧结过程，使得经过热压烧结处理之后，成品的致密性大大提高，并且晶粒结构变好，提高了磁学性能和力学性能。
Preparation method of high-density manganese-zinc ferrite
The invention discloses a preparation method of high-density manganese-zinc ferrite. The method sequentially comprises the following steps: 1) mixing 50-55 wt% of Fe2O3, 8-10 wt% of ZnO, 35-40 wt% ofMnO and 2-4 wt% of CoO powder, and adding 360 ppm of CaCO3, 220 ppm of SiO2, 480 ppm of Cr2O3 and 530 ppm of Nb2O5 into the mixed material; (2) carrying out primary ball milling, the rotating speed being 1100-1300rpm, and the ball milling time being 45min; (3) carrying out primary sintering, the temperature being controlled to be 880-920 DEG C, the time being 4 hours, heat preservation being conducted for 1 hour, and obtainig a block; 4) crushing the block until the particle size is less than 40 micrometers; (5) carrying out secondary ball milling under the argon atmosphere, the rotating speedbeing 1800-2500 rpm, and the ball milling time being 80 min; and (6) carrying out secondary sintering, wherein hot-pressing sintering is conducted under the vacuum condition, the pressure is 120 MPa,the temperature is controlled to be 1600-1650 DEG C, the time is 8-10 hours, and heat preservation is conducted for 2 hours to obtain the product. The hot-pressing sintering process is optimized, sothat the compactness of the finished product is greatly improved after hot-pressing sintering treatment, the grain structure becomes better, and the magnetic property and mechanical property are improved.
本申请公开了一种高致密锰锌铁氧体的制备方法，依次包括如下步骤：1）按重量百分比将50‑55%Fe2O3、8‑10%ZnO、35‑40%MnO、2‑4%CoO粉末混合，按照混合后的物料加入360ppm CaCO3、220ppm SiO2、480ppm Cr2O3、530ppm Nb2O5；2）一次球磨，转速为1100‑1300rpm，球磨时间为45min；3）一次烧结，控制温度为880‑920℃，时间4小时，保温1小时，得到块体；4）粉碎所述块体至粒径小于40μm；5）二次球磨，在氩气气氛下进行，转速为1800‑2500rpm，球磨时间为80min；6）二次烧结，真空条件下进行热压烧结，压力为120MPa，控制温度为1600‑1650℃，时间8‑10小时，保温2小时，得到产品。本发明优化了热压烧结过程，使得经过热压烧结处理之后，成品的致密性大大提高，并且晶粒结构变好，提高了磁学性能和力学性能。
Preparation method of high-density manganese-zinc ferrite
一种高致密锰锌铁氧体的制备方法
LIU YUN (Autor:in) / DAI JIABING (Autor:in) / MENG LI (Autor:in) / CAO ZHAOQING (Autor:in)
29.12.2020
Patent
Elektronische Ressource
Chinesisch
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