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High Curie temperature lead-based pyroelectric material and preparation method thereof
The invention belongs to the technical field of pyroelectric infrared detection, and particularly relates to a high Curie temperature lead-based pyroelectric material and a preparation method thereof, the chemical composition of the high Curie temperature lead-based pyroelectric material is Pb (Zr0. 9Ti0. 1) O3-xK2CO3, and x is more than or equal to 0.0 and less than or equal to 1.5% (mol). K2CO3 is doped into a PZT substrate, K < + > enters a crystal lattice and then replaces Pb < 2 + > at an A site to form an oxygen vacancy, polarization overturning is hindered, and the dielectric constant and the dielectric loss are reduced. As the radius of K < + > is larger than that of Pb < 2 + >, lattice distortion is further intensified, the polarization characteristic of the material is improved, and the material shows high pyroelectric performance and good temperature stability. In order to avoid element volatilization and reduce the sintering cost, a microwave sintering method is adopted, and the high-Curie-temperature lead-based pyroelectric ceramic material with good consistency can be efficiently prepared at low cost through process adjustment.
本发明属于热释电红外探测技术领域，具体地，涉及一种高居里温度铅基热释电材料及其制备方法，其化学组成为Pb(Zr0.9Ti0.1)O3‑xK2CO3，其中0.0≤x≤1.5％(mol)。通过向PZT基体掺杂K2CO3，K+进入晶格后取代A位的Pb2+形成氧缺位，阻碍极化翻转，使得介电常数与介电损耗有所降低。由于K+半径大于Pb2+，进一步加剧晶格畸变，提高了材料极化特性，使材料表现出较高的热释电性能和良好的温度稳定性。为了避免元素挥发，同时降低烧结成本，本专利采用微波烧结法，通过工艺调节，能够高效低成本地制备出一致性良好的高居里温度铅基热释电陶瓷材料。
High Curie temperature lead-based pyroelectric material and preparation method thereof
The invention belongs to the technical field of pyroelectric infrared detection, and particularly relates to a high Curie temperature lead-based pyroelectric material and a preparation method thereof, the chemical composition of the high Curie temperature lead-based pyroelectric material is Pb (Zr0. 9Ti0. 1) O3-xK2CO3, and x is more than or equal to 0.0 and less than or equal to 1.5% (mol). K2CO3 is doped into a PZT substrate, K < + > enters a crystal lattice and then replaces Pb < 2 + > at an A site to form an oxygen vacancy, polarization overturning is hindered, and the dielectric constant and the dielectric loss are reduced. As the radius of K < + > is larger than that of Pb < 2 + >, lattice distortion is further intensified, the polarization characteristic of the material is improved, and the material shows high pyroelectric performance and good temperature stability. In order to avoid element volatilization and reduce the sintering cost, a microwave sintering method is adopted, and the high-Curie-temperature lead-based pyroelectric ceramic material with good consistency can be efficiently prepared at low cost through process adjustment.
本发明属于热释电红外探测技术领域，具体地，涉及一种高居里温度铅基热释电材料及其制备方法，其化学组成为Pb(Zr0.9Ti0.1)O3‑xK2CO3，其中0.0≤x≤1.5％(mol)。通过向PZT基体掺杂K2CO3，K+进入晶格后取代A位的Pb2+形成氧缺位，阻碍极化翻转，使得介电常数与介电损耗有所降低。由于K+半径大于Pb2+，进一步加剧晶格畸变，提高了材料极化特性，使材料表现出较高的热释电性能和良好的温度稳定性。为了避免元素挥发，同时降低烧结成本，本专利采用微波烧结法，通过工艺调节，能够高效低成本地制备出一致性良好的高居里温度铅基热释电陶瓷材料。
High Curie temperature lead-based pyroelectric material and preparation method thereof
一种高居里温度铅基热释电材料及其制备方法
YANG YUYUN (Autor:in)
10.12.2024
Patent
Elektronische Ressource
Chinesisch
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
/
H10N
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