材料导报
材料導報
재료도보
MATERIALS REVIEW
2010年
4期
8-10
,共3页
磷灰石电解质%氧离子导体%Sr掺杂%溶胶-凝胶%阻抗频谱
燐灰石電解質%氧離子導體%Sr摻雜%溶膠-凝膠%阻抗頻譜
린회석전해질%양리자도체%Sr참잡%용효-응효%조항빈보
apatite electrolyte%oxide ion conductor%Sr-doping%sol-gel%impedance spectroscopy
采用溶胶-凝胶法于900℃成功合成了Sr掺杂的La_(9.33-2x/3)Sr_x(SiO_4)_6O_2前驱粉体,然后于1450℃烧结成陶瓷样品.利用X射线粉末衍射和环境扫描电镜对材料的物相和形貌进行了分析和表征,结果表明合成产物为磷灰石相,烧结后样品晶体颗粒比较均匀,有较好的致密度.采用交流阻抗谱研究了材料的导电性,发现Ln位阳离子空位比Ln位阳离子掺杂对材料电导率的影响更大,合适的Ln位阳离子空位更有利于提高材料的电导率.
採用溶膠-凝膠法于900℃成功閤成瞭Sr摻雜的La_(9.33-2x/3)Sr_x(SiO_4)_6O_2前驅粉體,然後于1450℃燒結成陶瓷樣品.利用X射線粉末衍射和環境掃描電鏡對材料的物相和形貌進行瞭分析和錶徵,結果錶明閤成產物為燐灰石相,燒結後樣品晶體顆粒比較均勻,有較好的緻密度.採用交流阻抗譜研究瞭材料的導電性,髮現Ln位暘離子空位比Ln位暘離子摻雜對材料電導率的影響更大,閤適的Ln位暘離子空位更有利于提高材料的電導率.
채용용효-응효법우900℃성공합성료Sr참잡적La_(9.33-2x/3)Sr_x(SiO_4)_6O_2전구분체,연후우1450℃소결성도자양품.이용X사선분말연사화배경소묘전경대재료적물상화형모진행료분석화표정,결과표명합성산물위린회석상,소결후양품정체과립비교균균,유교호적치밀도.채용교류조항보연구료재료적도전성,발현Ln위양리자공위비Ln위양리자참잡대재료전도솔적영향경대,합괄적Ln위양리자공위경유리우제고재료적전도솔.
The Sr doped La_(9.33-2x/3)Sr_x(SiO_4)_6O_2 is obtained at lower temperature (900℃) by sol-gel process.X-ray diffraction(XRD),scanning electron microscopy(SEM) and impedance spectroscopy tester are used to characterize the structure,appearance and conductivity of La_(9.33-2x/3)Sr_x(SiO_4)_6O_2.The results indicate that the apatite is synthesized.The crystal grains are homogeneous and dense.It is further influenced by moderate Ln vacancies than doped in optimizing the conductivity of the La_(9.33-2x/3)Sr_x(SiO_4)_6O_2.
