-
摘要: 以Pb3O4、ZrO2 和TiO2 粉体为原料,利用柱面冲击波合成了单一的钙钛矿相Pb(Zr0.95Ti0.05)O3 (即PZT95/5)粉体,用X射线衍射(XRD)和X射线电子能谱(XPS)对PZT的物相、元素化学态、分子结构和 成分含量进行了表征。冲击合成粉体和制备陶瓷的XPS结果表明,除表面存在少量的吸附氧外,样品中存在 PZT结构中的Pb、Zr 和O,陶瓷的元素定量计算接近样品的配比。且冲击压缩造成PZT 中 Zr O 、Pb O 键的键长降低,引起冲击合成粉体的Pb4f、Zr3d结合能增大。利用固相合成粉体制备陶瓷 的Zr3dXPS比冲击合成粉体制备陶瓷的Zr3dXPS多2个峰,对应于少量游离ZrO2 被还原的低价锆离子。Abstract: BychoosingthePb3O4,ZrO2andTiO2powdersastheraw material,singleperovskitePb (Zr0.95Ti0.05)O3(PZT95/5)powdersweresynthesizedwithacylindricalshockwaveloadingadvice. Thephase,elementaryvalencestates,molecularstructureandcompositionofPZT95/5werecharacterizedbyX- raydiffraction (XRD)andX-rayphotoelectronspectroscopy (XPS).TheXPSresults showthattherearethecrystallatticesPb,ZrandOofPZTinthepowdersandceramicspreparedby shockwave,withtheexceptionofadsorbedoxygenonthesamplesurface.Andthechemicalcompositionoftheceramicsamplesisneartheidealstoichiometricratio. Inaddition,thebondlengthsof Zr O , Pb O becomeshortundershockcompression,whichenlargesthebindingenergyof Pb4fandZr3dintheshock-synthesizedpowders.TheZr3dspectraoftheceramicspreparedwithsolid- state-synthesizedpowdershavetwopeaksmorethanthoseoftheceramicspreparedwithshocksynthesizedpowdersdo, whichattributestothelowervalencezirconiumionfromthereducedZrO2.
-
Key words:
- solidmechanics /
- XPS /
- shockwave /
- PZT95/5 /
- bindingenergy
点击查看大图
计量
- 文章访问数: 2465
- HTML全文浏览量: 60
- PDF下载量: 392
- 被引次数: 0