【摘要】：鐵氧體是一種應(yīng)用廣泛的非金屬磁性材料�；瘜W共沉淀法制備的顆粒具有顆粒細小、表面活性高等優(yōu)點，對制備低溫燒結(jié)的鐵氧體粉末十分適合。 本論文主要采用化學共沉淀法制備了適于低溫燒結(jié)的NiZnCu軟磁鐵氧體粉末和M型Ba硬磁鐵氧體粉末，并對影響其磁性能和晶體結(jié)構(gòu)的因素進行了分析，得到如下結(jié)果： 對NiZnCu軟磁鐵氧體粉末，實驗發(fā)現(xiàn)，首先，無論是采用NaOH還是Na_2CO_3作為沉淀劑，粉末樣品皆形成了單相的尖晶石結(jié)構(gòu)；以Na_2CO_3為沉淀劑制備的樣品的Ms比用NaOH為沉淀劑制備的樣品略高，而其平均晶粒尺寸遠小于以NaOH為沉淀劑制備的粉末，原因是使用Na_2CO_3為沉淀劑阻礙了晶粒的長大。其次，增加二次清洗過程有利于清洗Na~+雜質(zhì)離子，從而有利于促進樣品形成單相和晶粒長大。再次，不同的Li-Cr替換比例對Ni_(0.25-2x)Li_xCr_xCu_(0.15)Zn_(0.6)Fe_2O_4(x=0,0.01,0.02,0.03,0.04)鐵氧體的磁性能和晶體大小影響較大，總體上當x=0.02時樣品具有較好的磁性能。 對名義成分為Ba(ZnTi)_xFe_(12-2x)O_(19)(x=0.0,0.2,0.6,1.0,1.4)的M型Ba鐵氧體粉末，實驗發(fā)現(xiàn)，在非磁性離子(Zn~(2+)和Ti~(4+))聯(lián)合替換Fe~(3+)的情況下，，取代可以使煅燒溫度降低；飽和磁化強度Ms和剩余磁化強度Mr都在x=0.2左右達到最大值，但內(nèi)稟矯頑力與替換比例呈反比關(guān)系�？傮w來說，當x=0.2~0.6、煅燒溫度為1000C時，所得樣品性能相對較好。
[Abstract]:Ferrite is a widely used non-metallic magnetic material. The particles prepared by chemical coprecipitation have the advantages of fine particles and high surface activity, which are suitable for preparing ferrite powders sintered at low temperature. In this paper, NiZnCu soft magnetic ferrite powder and M type Ba hard magnetic ferrite powder suitable for low temperature sintering were prepared by chemical coprecipitation method, and the factors affecting their magnetic properties and crystal structure were analyzed. The results are as follows: for the NiZnCu soft magnetic ferrite powder, it is found that, first of all, the single phase spinel structure is formed in the powder samples whether NaOH or Na_2CO_3 is used as precipitant. The Ms of samples prepared with Na_2CO_3 as precipitant is slightly higher than that of samples prepared with NaOH, but the average grain size is much smaller than that of powders prepared with NaOH. The reason is that the use of Na_2CO_3 as precipitant hinders the growth of grains. Secondly, the addition of secondary cleaning process is conducive to the cleaning of Na ~ + impurity ions, thus facilitating the formation of single phase and grain growth of the sample. Thirdly, the different ratio of Li-Cr substitution has a great effect on the magnetic properties and crystal size of Ni0.25-2x LixCrxCu0.15 Zn0.6 Fe_2O_4 (x0. 01 / 0. 02 / 0. 03 / 0. 04) ferrite. For M-type Ba ferrite powders with nominal composition of Ba (ZnTi) xFe12-2x O19 (x0.00.20.20.2o0.60.0.40), it is found that the calcination temperature can be decreased when the substitution of Fe3 is combined with the substitution of non-magnetic ions (Zn2 and Ti4). The results show that the calcination temperature of M type Ba ferrite powders can be decreased when Fe ~ (3) is replaced by non-magnetic ions (Zn ~ (2) and Ti ~ (4) in the presence of non-magnetic ions (Zn ~ (2) and Ti4). The saturation magnetization (Ms) and the residual magnetization (Mr) have reached the maximum values around XG 0.2, but the intrinsic coercivity is inversely proportional to the substitution ratio. On the whole, the properties of the samples obtained are relatively good when the calcination temperature is 1000C.
【學位授予單位】：安徽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TM277

【參考文獻】

相關(guān)期刊論文 前10條

1 謝丹陽,高發(fā)明;M型鋇鐵氧體的制備與表征[J];兵器材料科學與工程;2004年01期

2 刁春麗;婁廣輝;;鐵氧體磁性材料的研究現(xiàn)狀與展望[J];山東陶瓷;2006年01期

3 張悅;蘭中文;余忠;;溶膠-凝膠法合成納米NiZn鐵氧體研究[J];材料導報;2006年S1期

4 吳雪予;抗EMI濾波器設(shè)計與應(yīng)用原理[J];磁性材料及器件;1999年05期

5 陳國華;21世紀軟磁鐵氧體材料和元件發(fā)展趨勢[J];磁性材料及器件;2001年04期

6 韓志全;疊層片式電感及低溫燒結(jié)鐵氧體的研發(fā)進展[J];磁性材料及器件;2004年06期

7 戴玉琴;趙特技;張懷武;;NiCuZn鐵氧體材料的應(yīng)用與開發(fā)[J];磁性材料及器件;2007年03期

8 趙特技;任學恒;袁陽;張懷武;;溶膠-凝膠法制備的高性能納米NiCuZn鐵氧體材料[J];磁性材料及器件;2007年03期

9 韓志全;廖楊;馮濤;;氧化物法與溶膠-凝膠法低溫共燒NiCuZn鐵氧體性能比較[J];磁性材料及器件;2008年04期

10 賴振宇;鄭亞林;徐光亮;劉敏;孫蓉;;微波輔助共沉淀法制備NiZnCu鐵氧體納米粉體研究[J];功能材料;2007年05期

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