本論文主要內容為以反應燒結法研製Pb(Ni1 / 3Nb2 / 3)O3 (PNN) 與 0.72Pb(Ni 1 / 3Nb2 / 3)O3-0.28PbTiO3 (PNNT)弛緩性鐵電陶瓷, 在本研究中, 我們 所使用製程為一種無需煆燒而直接燒結混合粉末之反應燒結法。用反應燒結法 製造當量PNN、PNNT 鈣鈦礦陶瓷體時, 在沒有煆燒的情況下, 混合PbO、 Nb2O5、Ni(NO3 ) 2 6H2O 及TiO2 直接壓模成型而後燒結。PNN 在1150~1230oC 燒結2 和4 小時有pyrochlore 相生成, 1250oC 時為100% perovsk i te。當加入 5wt% PbO 產生含鉛燒結氣氛時於1150∼ 1250oC 燒結2 與4 小時均可得到 100% perovsk i te PNN,1200oC 燒結2 小時有最佳密度8.51g/cm3 (理論密度值之 99.3%)。PNNT 在1230~1270oC 燒結2 和4 小時, 也是有少量pyrochlore 相存 在, 當加入3wt% PbO 補償後可得100% perovskite 相, 1230oC 燒結4 小時有 最大密度8.49g/cm3 (理論密度值之99.8%)。
Pb(Ni1 / 3Nb2 / 3)O3 (PNN) and 0.72Pb(Ni1 / 3Nb2 / 3)O3-0.28PbTiO3 (PNNT) reaction-sintering process were investigated. Wi t h o u t a n y c a l c i n a t i o n , t h e mixyure of PbO, Ni(NO3 ) 2, Nb2O5 and TiO2 was pressed and sintered directly. Pyrochlore phase was observed in PNN cerami c s s i n t e r e d a t 1150-1230o C f o r 2 and 4 hours. 100% perovskite PNN could be obtained at 1250o C sintering. As 5wt% PbO was added to compensate the PbO loss, 100% perovskite PNN ceramic s were obtained at 1150-1250oC sintering for 2 and 4 hours. Density of 8.51g/cm3 (99.3% of theoretical value) was obtained after sintered at 1230o C f o r 2 h . Pyrochlore phase was also observed in PNNT ceramics sintered at 1230-1270oC for 2 and 4 hours. As 3wt% PbO was added, 100% perovskite PNNT cerami c s were obtained at 1230-1270oC sintering for 2 and 4 hours. Density of 8.49g/cm3 (99.8% of theoretical value) was obtained after sintered at 1230o C f o r 4 h .