Pb0.92La0.08(Zr0.65Ti0.35) o.98O3 (PLZT) nanosized powder was prepared from the corresponding nitrate alnd H2O2 by thermal decomposition of the peroxide. FT-IR, DTA-TG, XRD, TEM, and chemical analyses indicated that: ...Pb0.92La0.08(Zr0.65Ti0.35) o.98O3 (PLZT) nanosized powder was prepared from the corresponding nitrate alnd H2O2 by thermal decomposition of the peroxide. FT-IR, DTA-TG, XRD, TEM, and chemical analyses indicated that: (l) Peroxide precursor of PLZT was composed of Pbo.92La0.08 (Zr0.65Ti0.35)0.98O2 (O2) 3H2O; (2) PLZT started to form at 5500C, but PbO and PbZro3 still existed; (3) homogeneous tetragonal crystals of PLZT were formed at 7000C, with average particle diameter Of 22nm; (4) the sizes of the crystals increased with increasing calcination temperatures, crystals of PLZT were formed at 8500C with average particle diameter of 56nm.展开更多
采用部分共沉淀法制备锆钛酸铅镧(PLZT)粉体,分别用普通马弗炉和微波马弗炉进行烧结成瓷,对比分析不同烧结方法对PLZT陶瓷的晶体结构、微观形貌和电学性能的影响。结果表明:微波烧结和常规烧结均成功制备出钙钛矿相PLZT陶瓷。采用微波...采用部分共沉淀法制备锆钛酸铅镧(PLZT)粉体,分别用普通马弗炉和微波马弗炉进行烧结成瓷,对比分析不同烧结方法对PLZT陶瓷的晶体结构、微观形貌和电学性能的影响。结果表明:微波烧结和常规烧结均成功制备出钙钛矿相PLZT陶瓷。采用微波烧结得到的PLZT陶瓷样品比常规烧结的晶粒细小,尺寸更均匀,孔洞较少;在电学性能相近时,微波烧结温度远低于常规烧结,且保温时间远小于常规烧结。在1000℃进行微波烧结,陶瓷的介电常数εr和压电常数d33最大,εr为2512,d33为405 p C/N,此时,剩余极化强度为16.5 k V/cm,矫顽场为8.2μC/cm2;在1250℃常规烧结,陶瓷的介电常数最大,为2822,压电常数最大,为508 p C/N,剩余极化强度为21.6 k V/cm,矫顽场为9.6μC/cm2。展开更多
文摘Pb0.92La0.08(Zr0.65Ti0.35) o.98O3 (PLZT) nanosized powder was prepared from the corresponding nitrate alnd H2O2 by thermal decomposition of the peroxide. FT-IR, DTA-TG, XRD, TEM, and chemical analyses indicated that: (l) Peroxide precursor of PLZT was composed of Pbo.92La0.08 (Zr0.65Ti0.35)0.98O2 (O2) 3H2O; (2) PLZT started to form at 5500C, but PbO and PbZro3 still existed; (3) homogeneous tetragonal crystals of PLZT were formed at 7000C, with average particle diameter Of 22nm; (4) the sizes of the crystals increased with increasing calcination temperatures, crystals of PLZT were formed at 8500C with average particle diameter of 56nm.
文摘采用部分共沉淀法制备锆钛酸铅镧(PLZT)粉体,分别用普通马弗炉和微波马弗炉进行烧结成瓷,对比分析不同烧结方法对PLZT陶瓷的晶体结构、微观形貌和电学性能的影响。结果表明:微波烧结和常规烧结均成功制备出钙钛矿相PLZT陶瓷。采用微波烧结得到的PLZT陶瓷样品比常规烧结的晶粒细小,尺寸更均匀,孔洞较少;在电学性能相近时,微波烧结温度远低于常规烧结,且保温时间远小于常规烧结。在1000℃进行微波烧结,陶瓷的介电常数εr和压电常数d33最大,εr为2512,d33为405 p C/N,此时,剩余极化强度为16.5 k V/cm,矫顽场为8.2μC/cm2;在1250℃常规烧结,陶瓷的介电常数最大,为2822,压电常数最大,为508 p C/N,剩余极化强度为21.6 k V/cm,矫顽场为9.6μC/cm2。
