利用传统的陶瓷工艺、通过B位氧化物预合成法制备了高质量、钙钛矿结构的(1-x)Pb(Fe1/4Sc1/4Nb1/2)O3-xPbTiO3(PFSN-PT)铁电陶瓷.结构测定和性能测试表明,1180℃烧结2h制备的PFSN-PT陶瓷呈现相当均匀的显微结构和良好的电学性能,同时具有较高的致密度(约95%),只有PbTiO3(PT)物质的量分数为40%、60%的陶瓷致密度略低(约91%).随着PT含量的增加,PFSN-PT从三方相结构转变为四方相结构,并伴随着晶胞体积的减小(从PFSN的6.6676×10-2 nm3下降到0.2PFSN-0.8PT的6.3555×10-2 nm3)和钙钛矿结构四方性的增大(从0.6PFSN-0.4PT的1.0242增加到0.2PFSN-0.8PT的1.0488).PFSN-PT陶瓷的介电常数最大值(εm)及其峰值温度(Tm)也随着PT含量的增加呈线性增大.介电性能测试和热滞行为研究表明,随着PT含量的增加,PFSN-PT的铁电-顺电相变从弛豫铁电体的弥散型铁电相变向正常铁电体的一级铁电相变转变.
参考文献
| [1] | Shrout T R;Halliyal A .Preparation of lead-based ferroelectric relaxors for capacitors[J].American Ceramic Society Bulletin,1987,66(04):704-711. |
| [2] | Haumont R;Dkhil B;Kiat J M et al.Cationic-competition-induced monoclinic phase in high piezoelectric (PbSc1/2Nb1/2O3)1-x-(PbTiO3)3 compounds[J].Physical Review B,2003,68:014114/1-01411410. |
| [3] | Optical properties of tetragonal Pb(Mg_(1/3)Nb_(2/3))_(0.62)Ti_(0.38)O_(3) single crystal[J].Journal of Applied Physics,2003(8):4766-4768. |
| [4] | B. Noheda .Structure and high-piezoelectricity in lead oxide solid solutions[J].Current opinion in solid state & materials science,2002(1):27-34. |
| [5] | Ivanov SA.;Rundlof H.;Thomas NW.;Ananta S.;Tellgren R. .Investigation of the structure of the relaxer ferroelectric Pb(Fe1/2Nb1/2)O-3 by neutron powder diffraction[J].Journal of Physics. Condensed Matter,2000(11):2393-2400. |
| [6] | Lampis N;Sciau P;Lehmann G A .Rietveld refinements of the paraelectric and ferroelectric structures of PbFe0.5Nb0.5O3[J].Journal of Physics:Condensed Matter,1999,11:3489-3500. |
| [7] | Adachi M;Miyabukuro E;Kawabata A .Preparation and properties of Pb[(Sc1/2Nb1/2)0.575Ti0.425]O3 ceramics[J].Japanese Journal of Applied Physics,1994,33:5420-5422. |
| [8] | Swartz S L;Shrout T R .Fabrication of perovskite lead magnesium niobate[J].Materials Research Bulletin,1982,17:1245-1250. |
| [9] | Orita M;Satoh H;Aizawa K et al.Preparation of ferroelectric relaxor Pb(Zn1/3Nb2/3)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 by two-step calcination method[J].Japanese Journal of Applied Physics,1992,31:3261-3264. |
| [10] | Fang B;Shan Y;Tezuka K;Imoto H .Synthesis and characterization of pseudo-ternary Pb(Fe1/2Nb1/2)O-3-PbZrO3-PbTiO3 ferroelectric ceramics via a B-site oxide mixing route[J].Journal of Materials Science,2005(24):6445-6451. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%