需要金幣： 1000 個(gè)金幣 |
資料包括：完整論文 |  |
 |
| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：14931 |  | |
| 折扣與優(yōu)惠：團(tuán)購(gòu)最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要：高居里溫度壓電材料在較高溫度下仍能良好工作，使其能應(yīng)用于航天航空、核能、冶金、石油化工等許多領(lǐng)域。通過(guò)傳統(tǒng)的固相反應(yīng)、利用鎢錳鐵礦預(yù)合成法，在不同的燒結(jié)溫度制備了xPb(Yb1/2Nb1/2)O3-(1-x)Pb(Zr0.35Ti0.65)O3（xPYN-(1-x)PZT）陶瓷。X射線衍射分析表明，合成的xPYN-(1-x)PZT（x=0.025-0.15）陶瓷為較純的四方鈣鈦礦結(jié)構(gòu)。在相同的燒結(jié)工藝條件下，0.075PYN-0.925PZT陶瓷具有最大的致密度，達(dá)到理論密度的92.24%。xPYN-(1-x)PZT陶瓷的介電響應(yīng)峰比較尖銳，隨著Pb(Yb1/2Nb1/2)O3（PYN）含量的增加，居里溫度呈上升趨勢(shì)。xPYN-(1-x)PZT陶瓷呈現(xiàn)典型的P-E電滯回線。0.125PYN-0.875PZT陶瓷的鐵電性能較好，剩余極化、矯頑場(chǎng)分別為20.40C/cm2、37.75kV/cm。xPYN-(1-x)PZT陶瓷的壓電應(yīng)變常量d33較小，0.125PYN-0.874PZT陶瓷的壓電性能最好，也僅達(dá)到68pC/N。xPYN-(1-x)PZT陶瓷的Qm、Kp、Kt值隨著PYN含量的增加呈現(xiàn)先增大后減小的趨勢(shì)。 關(guān)鍵詞：Pb(Yb1/2Nb1/2)O3-Pb(Zr0.35Ti0.65)O3；X射線衍射分析；鈣鈦礦結(jié)構(gòu)；居里溫度；電學(xué)性能
Abstract: Due to the excellent performance at high temperatures, high-Curie temperature piezoelectric materials have been applied widely in many fields, such as aerospace industry, nuclear energy, metallurgy industry, and petroleum and chemical industry. In this experiment, xPb(Yb1/2Nb1/2)O3-(1-x)Pb(Zr0.35Ti0.65)O3 (xPYN-(1-x)PZT) ferroelectric ceramics were prepared by the conventional solid-state reaction method via the wolframite precursor route sintered at different temperatures. XRD measurement confirmed that the synthesized xPYN-(1-x)PZT (x=0.025-0.15) ceramics exhibit rather pure tetragonal perovskite structure. At the same sintering conditions, the 0.075PYN-0.925PZT ceramics exhibit the largest density, which reaches 92.24% of the theoretical density. The xPYN-(1-x)PZT ceramics exhibit rather sharp dielectric response peaks. With the increase of the content of Pb(Yb1/2Nb1/2)O3 (PYN), the Curie temperature of the xPYN-(1-x)PZT ceramics increases almost linearly. The xPYN-(1-x)PZT ceramics exhibit typical P-E hysteresis loops. The 0.125PYN-0.875PZT ceramics exhibit excellent ferroelectric properties, in which the remnant polarization is 20.40C/cm2 and coercive field is 37.75kV/cm. Piezoelectric constant d33 of the xPYN-(1-x)PZT ceramics is small except for the 0.125PYN-0.874PZT ceramics, which reaches 68pC/N. With the increase of the content of PYN, the values of Qm, Kp and Kt exhibit the tendency to increase firstly and then decrease slightly. Key words：Pb(Yb1/2Nb1/2)O3-Pb(Zr0.35Ti0.65)O3; X-ray diffraction analysis; perovskite structure; Curie temperature; electrical properties
|
