本實驗利用化學共沉法製備鐵酸鉍塊材(BiFeO3)，並分別摻雜鑭元素及鐠元素。本實驗在製程上選擇化學共沉法，除了易於控制成分外，共沉法得到的微細粉末能降低材料的結晶溫度，相對於傳統固態反應法可以在比較低的製程溫度得到純相的鐵酸鉍塊材，本實驗的鐵酸鉍粉末最低在450℃即可結晶。摻雜鑭元素及鐠元素的鐵酸鉍塊材，Bi1-xLaxFeO3(BLFO)和Bi1-x PrxFeO3 (BPFO)選擇的成分為x=0.1和0.2，探討不同成分及不同摻雜離子對電性及磁性的影響。由結果得知，當x=0.2時，BLFO和BPFO的結晶相從菱形晶轉變為正方晶，在電性表現方面，BLFO和BPFO的介電常數都比BFO高，BLFO介電常數隨著摻雜濃度增加而變大，在1MHz下，x=0.2，燒結850℃後可得到最大的介電常數值，k=120；BLFO和BPFO的散逸因子也都比BFO低，在1MHz下，BPFO在x=0.2燒結850℃後可得到最低的散逸因子0.01。在磁性表現方面，BLFO和BPFO都表現出鐵磁特性，BLFO的磁化量隨著摻雜鑭濃度增加而增加，BPFO在x=0.2時的磁化量是各成分最高的，在15,000Oe下磁化量為4.16(emu/cm3)

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