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Lead magnesium niobate-lead titanate relaxor ferroelectric ceramic as well as preparation method and application thereof
The invention discloses a lead magnesium niobate-lead titanate relaxor ferroelectric ceramic and a preparation method and application thereof.The chemical general formula of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is (100-x) PbMg (1/3Nb2/3) O3-xPbTiO3, x is larger than or equal to 26 and smaller than or equal to 24, the trigonal-tetragonal phase change of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is larger than or equal to 80 DEG C, the Curie temperature of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is larger than or equal to 110 DEG C, and the pyroelectric coefficient of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is larger than or equal to 5.5 * 10 <-8 > C.cm <-2 >. K <-1 >. The preparation method comprises the following steps: A, weighing C4H6MgO4. 4H2O and Nb2O5 according to a stoichiometric ratio, and carrying out wet ball milling, material taking, drying and calcining to obtain an MgNb2O6 precursor; b, Pb3O4, TiO2 and MgNb2O6 are weighed according to the stoichiometric ratio, and PMN-PT powder is obtained through wet ball milling, material taking, drying and calcination; c, carrying out secondary ball milling on the PMN-PT powder, drying, sieving, adding polyvinyl alcohol (PVA), granulating, and carrying out compression molding to obtain a ceramic green body; according to the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic obtained by the invention, the trigonal-tetragonal phase change is greater than or equal to 80 DEG C, the Curie temperature is greater than or equal to 110 DEG C, the pyroelectric coefficient is greater than or equal to 5.5 * 10 <-8 > C.cm <-2 >. K <-1 >, and the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic can be widely applied to the aspect of high-performance pyroelectric detectors.
本发明公开了铌酸铅镁‑钛酸铅弛豫铁电陶瓷及其制备方法和应用，铌酸铅镁‑钛酸铅弛豫铁电陶瓷的化学通式为（100‑x）PbMg（1/3Nb2/3）O3‑xPbTiO3，其中24≤x≥26，且其三方‑四方相变≥80℃，居里温度≥110℃，热释电系数≥5.5×10‑8C.cm‑2.K‑1，其制备方法包括以下步骤：A、按化学计量比称量C4H6MgO4·4H2O、Nb2O5，经湿法球磨、取料、烘干、煅烧得到MgNb2O6前驱体；B、按化学计量比称量Pb3O4、TiO2、MgNb2O6，经湿法球磨、取料、烘干、煅烧得到PMN‑PT粉体；C、PMN‑PT粉体经二次球磨后，烘干，过筛，加入聚乙烯醇（PVA）造粒，压制成型得到陶瓷生坯。本发明得到的铌酸铅镁‑钛酸铅弛豫铁电陶瓷，其三方‑四方相变≥80℃，居里温度≥110℃，热释电系数≥5.5×10‑8C.cm‑2.K‑1，可广泛应用于高性能热释电探测器方面。
Lead magnesium niobate-lead titanate relaxor ferroelectric ceramic as well as preparation method and application thereof
The invention discloses a lead magnesium niobate-lead titanate relaxor ferroelectric ceramic and a preparation method and application thereof.The chemical general formula of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is (100-x) PbMg (1/3Nb2/3) O3-xPbTiO3, x is larger than or equal to 26 and smaller than or equal to 24, the trigonal-tetragonal phase change of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is larger than or equal to 80 DEG C, the Curie temperature of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is larger than or equal to 110 DEG C, and the pyroelectric coefficient of the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic is larger than or equal to 5.5 * 10 <-8 > C.cm <-2 >. K <-1 >. The preparation method comprises the following steps: A, weighing C4H6MgO4. 4H2O and Nb2O5 according to a stoichiometric ratio, and carrying out wet ball milling, material taking, drying and calcining to obtain an MgNb2O6 precursor; b, Pb3O4, TiO2 and MgNb2O6 are weighed according to the stoichiometric ratio, and PMN-PT powder is obtained through wet ball milling, material taking, drying and calcination; c, carrying out secondary ball milling on the PMN-PT powder, drying, sieving, adding polyvinyl alcohol (PVA), granulating, and carrying out compression molding to obtain a ceramic green body; according to the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic obtained by the invention, the trigonal-tetragonal phase change is greater than or equal to 80 DEG C, the Curie temperature is greater than or equal to 110 DEG C, the pyroelectric coefficient is greater than or equal to 5.5 * 10 <-8 > C.cm <-2 >. K <-1 >, and the lead magnesium niobate-lead titanate relaxor ferroelectric ceramic can be widely applied to the aspect of high-performance pyroelectric detectors.
本发明公开了铌酸铅镁‑钛酸铅弛豫铁电陶瓷及其制备方法和应用，铌酸铅镁‑钛酸铅弛豫铁电陶瓷的化学通式为（100‑x）PbMg（1/3Nb2/3）O3‑xPbTiO3，其中24≤x≥26，且其三方‑四方相变≥80℃，居里温度≥110℃，热释电系数≥5.5×10‑8C.cm‑2.K‑1，其制备方法包括以下步骤：A、按化学计量比称量C4H6MgO4·4H2O、Nb2O5，经湿法球磨、取料、烘干、煅烧得到MgNb2O6前驱体；B、按化学计量比称量Pb3O4、TiO2、MgNb2O6，经湿法球磨、取料、烘干、煅烧得到PMN‑PT粉体；C、PMN‑PT粉体经二次球磨后，烘干，过筛，加入聚乙烯醇（PVA）造粒，压制成型得到陶瓷生坯。本发明得到的铌酸铅镁‑钛酸铅弛豫铁电陶瓷，其三方‑四方相变≥80℃，居里温度≥110℃，热释电系数≥5.5×10‑8C.cm‑2.K‑1，可广泛应用于高性能热释电探测器方面。
Lead magnesium niobate-lead titanate relaxor ferroelectric ceramic as well as preparation method and application thereof
铌酸铅镁-钛酸铅弛豫铁电陶瓷及其制备方法和应用
LI JIAJIU (author) / YAO FANGZHOU (author) / YANG WANRONG (author)
2022-03-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
G01J
Messen der Intensität, der Geschwindigkeit, der spektralen Zusammensetzung, der Polarisation, der Phase oder der Pulscharakteristik von infrarotem, sichtbarem oder ultraviolettem Licht
,
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
| British Library Online Contents | 2007
| European Patent Office | 2022