Mn-Zn铁氧体前驱体粉末压制性能研究  

The Performance Study on Powder Compaction of Mn- Zn Ferrite Precursor

作　　者：禹辉锆 张家敏[1] 果露 

机构地区：[1]昆明理工大学,云南昆明650093 [2]长沙锐合钻石工具有限公司,湖南长沙410205

出　　处：《云南冶金》2014年第6期38-42,共5页Yunnan Metallurgy

摘　　要：研究了Mn-Zn铁氧体前驱体粉末的压制性能,探讨了压制压力、球磨时间、预烧温度对前驱体粉末压坯密度的影响。结果表明:(1)压坯密度随着压制压力的增大而增大,当压制压力达到225 MPa以上时,在750℃、800℃预烧的粉末压坯密度增加趋势减缓,但在850℃、900℃预烧的粉末压坯密度继续随压制压力增加而增加,压力达到300 MPa时密度增加趋势减缓,球磨10 h 900℃预烧粉末的压制密度达到3.456 g/cm3,得到的压坯密度较大;(2)压坯密度随着预烧温度的增加而增加,球磨10 h的粉末分别在温度750℃、800℃、850℃、900℃预烧,成形压力300 MPa得到的压坯密度分别为2.85 g/cm3、2.92 g/cm3、3.12 g/cm3、3.31 g/cm3;(3)球磨时间对Mn-Zn铁氧体的压制性能有一定影响,随着球磨时间的增加压坯密度有增加的趋势,但是增加趋势不明显。The performance study on powder compaction of Mn-Zn ferrite precursor is researched; and the effect of compacting pressure,ball- mining time,pre- burning temperature on green compact density of precursor is discussed too. The results show：（ 1） the green density is increased along with the increasing compacting pressure,when the compacting pressure above 225 MPa,the pre- burning green compact density increased slowly under 750℃,800℃; but the pre- burning green compact density increased continually along with the increased compacting pressure under 850℃,900℃,when the pressure is reach to 300 MPa,the density is increased slowly,the preburning green compact density is 3. 456 g / cm3 with ball mining 10 hours,under 900℃,the green density is high;（ 2） The green density is increased along with the increased pre-burning temperature,we can get the green density separately are 2. 85 g / cm3,2. 92 g/cm3,3. 12 g/cm3,3. 31 g/cm3 under the temperature 750℃,800℃,850℃,900℃,with 10 hours ball mining and 300 MPa compacting pressure;（ 3）The ball mining time has a certain effect to the compacting properties of Mn-Zn ferrite,which has the increasing trend along with the increasing ball mining time,but the increasing trend is not obvious.

关 键 词：Mn-Zn铁氧体前驱体 压坯密度 压制压力 预烧温度 球磨时间 

分 类 号：TF124.31[冶金工程—粉末冶金]