机械力化学法制备Pb(Sc_(0.5)Ta_(0.5))O_3弛豫铁电陶瓷微粉  

Preparation of Pb(Sc~ 0.5 Ta^0.5 )O^3 Relaxor Ferroelectric Ceramic Fine Powders Via Mechanochemical Method

作　　者：张明福[1] 杨立见 王靖 王彪[2] 王世忠[3] 

机构地区：[1]南京大学固体微结构物理实验室,南京210093 [2]哈尔滨工业大学复合材料研究所,哈尔滨150001 [3]哈尔滨工业大学航天工程与力学系,哈尔滨150001

出　　处：《压电与声光》2002年第5期378-381,共4页Piezoelectrics & Acoustooptics

摘　　要：用机械力化学法合成了单相 Pb(Sc0 .5Ta0 .5) O3(R)弛豫铁电陶瓷微粉 ,并对球磨 5 h得到的陶瓷粉体和未经球磨的原料进行了热处理研究。实验结果表明 ,单相 Pb(Sc0 .5Ta0 .5) O3可在球磨 7h得到 ,TEM图像显示 ,晶粒尺寸为 30～ 4 0 m m,与根据 Scheerer公式计算的结果吻合。 5 h粉体的热处理结果显示 ,焦绿矿相并未因球磨过程而在煅烧中不出现 ;原始粉体的热处理结果也显示出焦绿矿在 135 0°C温度下煅烧 4 h,仍有少量存在。比较实验的结果表明 ,在制备 Pb(Sc0 .5Ta0 .5) O3的过程中 ,初始原料必须经过充分球磨才可实现单相目标产物的合成。Fine powders of single phase Pb(Sc 0 5 Ta 0 5 )O 3 relaxor ferroelectric ceramic were synthesized by mechanochemical method.Heat treatment analyzed reaction mechanism of starting materials and the powder as milled for 5 h.The results indicated that single phase Pb(Sc 0 5 Ta 0 5 )O 3 with the particle size of 30～40 nm was obtained with milling for 7 h,and the size is consisted with the value calculated from Scheerer.The heat treatment results of as milled 5 hours shown that the pyrochloride phase was not avoided under the milling process,that of the starting powders exhibited the pyrochloride phase with little amount still existed in the product that calcined at 1 350 °C for 4 h.The comparison experiments suggested that the starting powders must be milled adequately in order to synthesize single phase Pb(Sc 0 5 Ta 0 5 )O 3

关 键 词：Pb(Sc0.5Ta0.5)O3 陶瓷微粉 钽钪酸铅 机械力化学 弛豫铁电体 

分 类 号：TM282[一般工业技术—材料科学与工程]