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High-energy-storage silver niobate-based lead-free antiferroelectric ceramic and preparation method thereof
The invention discloses high-energy-storage silver niobate-based lead-free antiferroelectric ceramic and a preparation method thereof.The chemical formula of the high-energy-storage silver niobate-based lead-free antiferroelectric ceramicis Ag<1-3x>LaNb<0.9>Ta<0.1>O<3>, wherein x is the molar percentage, and the value of x can meets the electric neutrality requirement. The preparation method ofthe high-energy-storage silver niobate-based lead-free antiferroelectric ceramic comprises the following steps: (1) weighing raw materials according to a stoichiometric ratio in thechemical formula Ag<1-3x>LaNb<0.9>Ta<0.1>O<3>, carrying out ball-milling mixing, drying, sieving and tabletting on the raw materials, and presintering the raw materials for 4-6 hours to obtain a rough blank; (2) grinding the rough blank, carrying out secondary ball milling, drying, sieving, granulating, and uniaxial compression molding, and carrying out isostatic cool compression molding to obtain a biscuit; (3)discharging glue from the biscuit, and sintering to obtain a ceramic chip; and (4) grinding and polishing the ceramic chipinto a ceramic sheet, brushing the ceramic sheet with a silver electrode, calcining, and cooling. The energy storage ceramic with high energy storage density and high energy storage efficiency can be obtained by doping a trace amount of La < 3 + > at ceramicA site, the energystorage density is up to 4.6 J/cm < 3 >, and the energy storage efficiency is up to 59%.
本发明公开了一种高储能铌酸银基无铅反铁电陶瓷及其制备方法，该陶瓷化学式为AgLaNbTaO，其中x为摩尔百分比，x的取值满足电中性；该陶瓷的制备方法包括以下步骤：(1)按化学式AgLaNbTaO中的计量比称取原料，将原料进行球磨混合、烘干、过筛、压片，再将原料预烧结4～6小时，得到粗坯；(2)将粗坯研碎，再进行二次球磨、烘干、过筛、造粒、单轴压制成型后，进行冷等静压制成型，得到素坯；(3)将素坯排胶后进行烧结，得到陶瓷片；(4)将陶瓷片打磨、抛光为陶瓷薄片，刷上银电极后，再进行煅烧、冷却。该陶瓷A位使用微量La进行掺杂即可得到高储能密度和高储能效率的储能陶瓷，储能密度高达4.6J/cm，储能效率高达59％。
High-energy-storage silver niobate-based lead-free antiferroelectric ceramic and preparation method thereof
The invention discloses high-energy-storage silver niobate-based lead-free antiferroelectric ceramic and a preparation method thereof.The chemical formula of the high-energy-storage silver niobate-based lead-free antiferroelectric ceramicis Ag<1-3x>LaNb<0.9>Ta<0.1>O<3>, wherein x is the molar percentage, and the value of x can meets the electric neutrality requirement. The preparation method ofthe high-energy-storage silver niobate-based lead-free antiferroelectric ceramic comprises the following steps: (1) weighing raw materials according to a stoichiometric ratio in thechemical formula Ag<1-3x>LaNb<0.9>Ta<0.1>O<3>, carrying out ball-milling mixing, drying, sieving and tabletting on the raw materials, and presintering the raw materials for 4-6 hours to obtain a rough blank; (2) grinding the rough blank, carrying out secondary ball milling, drying, sieving, granulating, and uniaxial compression molding, and carrying out isostatic cool compression molding to obtain a biscuit; (3)discharging glue from the biscuit, and sintering to obtain a ceramic chip; and (4) grinding and polishing the ceramic chipinto a ceramic sheet, brushing the ceramic sheet with a silver electrode, calcining, and cooling. The energy storage ceramic with high energy storage density and high energy storage efficiency can be obtained by doping a trace amount of La < 3 + > at ceramicA site, the energystorage density is up to 4.6 J/cm < 3 >, and the energy storage efficiency is up to 59%.
本发明公开了一种高储能铌酸银基无铅反铁电陶瓷及其制备方法，该陶瓷化学式为AgLaNbTaO，其中x为摩尔百分比，x的取值满足电中性；该陶瓷的制备方法包括以下步骤：(1)按化学式AgLaNbTaO中的计量比称取原料，将原料进行球磨混合、烘干、过筛、压片，再将原料预烧结4～6小时，得到粗坯；(2)将粗坯研碎，再进行二次球磨、烘干、过筛、造粒、单轴压制成型后，进行冷等静压制成型，得到素坯；(3)将素坯排胶后进行烧结，得到陶瓷片；(4)将陶瓷片打磨、抛光为陶瓷薄片，刷上银电极后，再进行煅烧、冷却。该陶瓷A位使用微量La进行掺杂即可得到高储能密度和高储能效率的储能陶瓷，储能密度高达4.6J/cm，储能效率高达59％。
High-energy-storage silver niobate-based lead-free antiferroelectric ceramic and preparation method thereof
一种高储能铌酸银基无铅反铁电陶瓷及其制备方法
GUO YANYAN (Autor:in) / FAN QINGYU (Autor:in) / ZHANG JIN (Autor:in) / ZHAO JIANG (Autor:in)
19.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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