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    • 6. 发明授权
    • Ferroelectric ceramic compound, a ferroelectric ceramic single crystal, and preparation processes thereof
    • 铁电陶瓷复合物,铁电陶瓷单晶及其制备方法
    • US07527690B2
    • 2009-05-05
    • US10551355
    • 2003-07-30
    • Sang-Goo LeeMin-Chan KimByung-Ju ChoiMin-Chul ShinSu-Han Yu
    • Sang-Goo LeeMin-Chan KimByung-Ju ChoiMin-Chul ShinSu-Han Yu
    • C30B11/04
    • C01G33/006C01P2006/40C30B11/00C30B29/22H01G7/06H01L21/3147H01L21/31691H01L41/18
    • The present invention relates to a ferroelectric ceramic compound having the composition of the following formula: s[L]−x[P]y[M]z[N]p[T], a ferroelectric ceramic single crystal, and preparation processes thereof. The ferroelectric ceramic compound and the single crystal according to the present invention are relaxor ferroelectrics having high piezoelectricity, a high electromechanical coefficient and a high electrooptical coefficient, and are useful for manufacturing tunable filters for radio communication, optical communication devices, surface acoustic wave devices, and the like. Particularly, the process of preparing the single crystal according to the present invention enables preparation of a single crystal having a diameter of 5 cm or greater and a single crystal wafer with uniform composition. In the formula, [P] is lead oxide, [M] is magnesium oxide or zinc oxide, [N] is niobium oxide, [T] is titanium oxide, [L] is one selected from the group consisting of lithium tantalate or lithium niobate, lithium, lithium oxide, platinum, indium, palladium, rhodium, nickel, cobalt, iron, strontium, scandium, ruthenium, copper, yttrium, and ytterbium or mixtures thereof, and x, y, z, p and s are defined as 0.55
    • 本发明涉及具有下式的组成的铁电陶瓷化合物及其制备方法:s [L] -x [P] y [M] z [N] p [T],铁电陶瓷单晶。 根据本发明的铁电陶瓷化合物和单晶是具有高压电性,高机电系数和高电光系数的弛豫铁电体,并且可用于制造用于无线电通信的可调谐滤波器,光通信装置,表面声波装置, 等等。 特别地,根据本发明的制备单晶的方法能够制备直径为5cm以上的单晶和具有均匀组成的单晶晶片。 在该式中,[P]是氧化铅,[M]是氧化镁或氧化锌,[N]是氧化铌,[T]是氧化钛,[L]是选自钽酸锂或锂 铌酸锂,锂,氧化锂,铂,铟,钯,铑,镍,钴,铁,锶,钪,钌,铜,钇和镱或其混合物,x,y,z,p和s定义为 0.55