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Lead-free NBT-based ceramic material and preparation method thereof
The invention belongs to the field of dielectric energy storage ceramic capacitors, and relates to a lead-free NBT-based ceramic material, the chemical formula is (1-x) (Na0. 5Bi0. 5) TiO3-xBi (Mg2/3Nb1/3) O3, x is the molar percentage of Bi (Mg2/3Nb1/3) O3, and x is more than or equal to 0.1 and less than or equal to 0.5. The preparation method comprises the following steps: preparing Bi2O3, Nb2O5, Na2CO3, TiO2 and MgO according to a chemical formula, ball-milling, uniformly mixing, drying, sieving, briquetting, pre-sintering at 750-850 DEG C for 3-5 hours to obtain a blocky solid, crushing the blocky solid, and sieving to obtain pre-sintered powder; carrying out ball milling on the pre-sintered powder, drying, and sieving to obtain raw material powder; and carrying out cold isostatic pressing on the raw material powder, carrying out isostatic pressing on the raw material powder to form a sheet, and sintering into ceramic to obtain the lead-free NBT-based ceramic material. The energy storage characteristic and the temperature stability of the sodium bismuth titanate-based ceramic material are improved.
本发明属于电介质储能陶瓷电容器领域，涉及一种无铅NBT基陶瓷材料，化学式为：(1‑x)(Na0.5Bi0.5)TiO3‑xBi(Mg2/3Nb1/3)O3，其中x为Bi(Mg2/3Nb1/3)O3的摩尔百分数，且0.1≤x≤0.5。按化学式配取Bi2O3、Nb2O5、Na2CO3、TiO2及MgO，通过球磨后混合均匀，烘干、过筛、压块，再经750～850℃预烧3～5小时，得到块状固体，然后将块状固体粉碎后过筛，得到预烧粉体；将预烧粉体球磨后烘干，过筛后获得原料粉体；将原料粉体进行冷等静压，等静压压制成片状后，烧结成瓷，得到该无铅NBT基陶瓷材料。提高钛酸铋钠基陶瓷材料的储能特性和温度稳定性。
Lead-free NBT-based ceramic material and preparation method thereof
The invention belongs to the field of dielectric energy storage ceramic capacitors, and relates to a lead-free NBT-based ceramic material, the chemical formula is (1-x) (Na0. 5Bi0. 5) TiO3-xBi (Mg2/3Nb1/3) O3, x is the molar percentage of Bi (Mg2/3Nb1/3) O3, and x is more than or equal to 0.1 and less than or equal to 0.5. The preparation method comprises the following steps: preparing Bi2O3, Nb2O5, Na2CO3, TiO2 and MgO according to a chemical formula, ball-milling, uniformly mixing, drying, sieving, briquetting, pre-sintering at 750-850 DEG C for 3-5 hours to obtain a blocky solid, crushing the blocky solid, and sieving to obtain pre-sintered powder; carrying out ball milling on the pre-sintered powder, drying, and sieving to obtain raw material powder; and carrying out cold isostatic pressing on the raw material powder, carrying out isostatic pressing on the raw material powder to form a sheet, and sintering into ceramic to obtain the lead-free NBT-based ceramic material. The energy storage characteristic and the temperature stability of the sodium bismuth titanate-based ceramic material are improved.
本发明属于电介质储能陶瓷电容器领域，涉及一种无铅NBT基陶瓷材料，化学式为：(1‑x)(Na0.5Bi0.5)TiO3‑xBi(Mg2/3Nb1/3)O3，其中x为Bi(Mg2/3Nb1/3)O3的摩尔百分数，且0.1≤x≤0.5。按化学式配取Bi2O3、Nb2O5、Na2CO3、TiO2及MgO，通过球磨后混合均匀，烘干、过筛、压块，再经750～850℃预烧3～5小时，得到块状固体，然后将块状固体粉碎后过筛，得到预烧粉体；将预烧粉体球磨后烘干，过筛后获得原料粉体；将原料粉体进行冷等静压，等静压压制成片状后，烧结成瓷，得到该无铅NBT基陶瓷材料。提高钛酸铋钠基陶瓷材料的储能特性和温度稳定性。
Lead-free NBT-based ceramic material and preparation method thereof
一种无铅NBT基陶瓷材料及其制备方法
ZHANG HONGLI (author) / CUI KAI (author)
2022-08-19
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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