首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
纳米掺杂剂中Mn离子对BaTiO_3基多层陶瓷电容器瓷料的影响
作者:李波 张树人 周晓华 陈祝 贾程棡  
单位:电子科技大学微电子与固体电子学院 电子科技大学微电子与固体电子学院 电子科技大学微电子与固体电子学院 电子科技大学微电子与固体电子学院 电子科技大学微电子与固体电子学院 成都610054 成都610054 成都610054 成都610054 成都610054 
关键词:多层陶瓷电容器  钛酸钡    溶胶凝胶法  纳米掺杂工艺 
分类号:TM53
出版年,卷(期):页码:2006,34(3):293-298
DOI:
摘要:
通过溶胶凝胶法合成含Mn的复合氧化物Y3MgMnxSi O7.5+x(x=0.1,0.2,0.5,1.0)纳米掺杂剂,并采用纳米掺杂工艺制备BaTi O3基多层陶瓷电容器瓷料。采用热重差热分析、X射线衍射、透射电子显微镜对干凝胶及其焙烧粉体进行表征,并研究了纳米掺杂剂中Mn离子对陶瓷微观结构、介电性能以及抗还原性的影响。结果表明干凝胶经650,750,850,950℃焙烧后获得平均粒度分别为25.9,40.2,51.8,67.9nm的Y3MgMnxSi O7.5+x纳米粉,在850℃附近从无定形态向结晶态转变。Mn能够显著地抑制BaTi O3基陶瓷的晶粒生长并提高均匀性和致密性,平均晶粒尺寸约0.4μm。随着纳米掺杂剂中Mn含量的增加,陶瓷由四方晶型向赝立方晶型转变,并促使“壳芯”结构的形成,从而显著改善介电温度特性并提高室温介电常数(ε25℃≥2600)。纳米掺杂剂中多价态Mn离子作为受主能抑制自由电子浓度,增强瓷料的抗还原性,使瓷料的介质损耗减小(tanδ<1.0%),绝缘电阻率提高(ρ=1012Ω·cm),符合EI A X7R/X8R标准。
how do i know if my wife has cheated infidelity in marriage read
open cheat women go
my husband cheated on me redirect women who cheat on husband
doxycycline doxycycline doxycycline
sumatriptan side effects sumatriptan side effects sumatriptan side effects
bystolic copay card click bystolic coupon voucher
Nano-composite oxide dopant Y_3MgMn_xSiO_ 7.5+x (x=0.1,0.2,0.5,1.0) was synthesized by the solgel method and BaTiO_3-based ultrafine nonreducible dielectrics for multilayer ceramic capacitance were prepared by the nano-doping process. Xerogel and calcined nanopowder were characterized by thermogravimetricdifferential thermal analysis, X-ray diffraction and transmission electron microscopy. The effect of manganese ion in nano-dopant on the microstructure and dielectric properties as well as the non-reducibility of BaTiO_3-based ceramics were investigated. The results indicate that the average particle size of nanopowder Y_3MgMn_xSiO_ 7.5+x calcined at 650, 750, 850℃ and 950℃ is about 25.9, 40.2, 51.8nm and 67.9nm, respectively, and the BaTiO_3-based nanopowder begins to crystallize around 850℃. Mn can dramatically inhibit the grain growth of BaTiO_3 -based ceramics and promote the formation of fine grain structure (average grain size about 0.4μm). With the increase of Mn content in nano-dopant, the crystal structure of ceramics transform from tetragonal to pseudocubic and the coreshell structuses are perfectly formed. Accordingly, the dielectric temperature characteristics are improved and the permittivity at room temperature is more than 2600. Multivalent Mn ion in nano-dopant acting as an acceptor can effectively restrain the electronic concentration and reinforce the non-reducibility of the ceramics. Dielectric loss of the ceramic is lower than 1.0 % and insulation resistivity increases to 10 12 Ω·cm consequently. BaTiO_3-based dielectrics with high performances can be obtained to meet the requirements of EIA X7R/X8R standards.
read wifes cheat reasons wives cheat on their husbands
read read here link
基金项目:
作者简介:
online click open
read percentage of women who cheat signs of infidelity
open open My husband cheated on me
cialis discount coupons coupons for cialis 2016 cialis 2015 coupon
参考文献:
[1]KISHI H,MIZUNO Y,CHAZONO H.Base-metal electrode-multilayer ceramic capacitors:past,present and future per-spectives[J].Jpn J Appl Phys,2003,42(1):115. [2]CHAZONO H,FUJI MOTO M.Sintering characteristics and formation mechanisms of“core-shell”structure in BaTi O3Nb2O5Co3O4ternary system[J].Jpn J Appl Phys,1995,34(9):53545359. [3]KISHI H,OKI NO Y,HONDA M,et al.The Effect of MgO and rare-earth oxide on formation behavior of core-shell struc-ture in BaTi O3[J].Jpn J Appl Phys,1997,36(9):59545957. [4]李波,张树人,周晓华,等.水基溶胶凝胶法制备稀土/碱土金属硅酸盐纳米粉[J].中国稀土学报,2005,23(2):166170.LI Bo,ZHANG Shuren,ZHOU Xiaohua,et al.J Chin Rare Earth Soc(in Chinese),2005,23(2):166170. [5]李波,张树人,周晓华,等.复合氧化物纳米粉掺杂BaTi O3基MLCC超细瓷料[J].复合材料学报,2005,22(4):9195.LI Bo,ZHANGShuren,ZHOU Xiaohua,et al.Acta Materiae Compositae Sinica(in Chinese),2005,22(4):9195. [6]唐子龙,唐小锋,周志刚,等.掺锰BaTi O3PTCR陶瓷的电子顺磁共振研究[J].硅酸盐学报,2002,30(1):5761.TANG Zilong,TANG Xiaofeng,ZHOU Zhigang,et al.J Chin CeramSoc(in Chinese),2002,30(1):5761. [7]FANG T T,HSIEH H L,SHI AU F S.Effect of pore mor-phology and grain size on the dielectric properties and tetragon-al-cubic phase transition of high-purity barium titanate[J].J Am CeramSoc,1993,76(5):12051211. [8]KR GER F A,VI NK H J,Solid State Physics[M].New York:Academic Press,1956.p307.
how to cheat women who want to cheat wife cheat story
married cheaters cheat on my wife click
why women cheat on husbands link link
open open My husband cheated on me
bystolic copay card click bystolic coupon voucher
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com