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Lead hafnate antiferroelectric ceramic material and preparation method thereof
The invention discloses a lead hafnate antiferroelectric ceramic material and a preparation method thereof, and belongs to the field of antiferroelectric ceramic materials. According to the preparation method disclosed by the invention, preparation is carried out by combining excessive lead and a three-layer crucible sintering method, and when the three-layer crucible sintering method is used for sintering, the PbZrO3 embedded material is heated and decomposed at a high temperature to generate a large number of oxygen molecules, so that local saturated vapor pressure is formed, evaporation, condensation and mass transfer can be promoted at the initial stage of sintering, and the densification rate of a sintered product is increased; the aluminum oxide powder stably exists at the sintering temperature, and a sintering environment with the uniform temperature is provided; according to the method, sintering is carried out under the conditions of relative oxygen enrichment and uniform temperature, the grain size of a sample obtained through sintering is uniform, and the microstructure is compact; and the stoichiometric ratio of Pb to Hf in the sintered product can be accurately controlled by controlling excessive lead and sintering conditions, so that the stoichiometric ratio is closer to 1: 1. The preparation method is simple in preparation process, low in cost and good in repeatability.
本发明公开了一种铪酸铅反铁电陶瓷材料及其制备方法，属于反铁电陶瓷材料领域。本发明的制备方法，采用铅过量和三层坩埚烧结法相结合进行制备，使用三层坩埚烧结法进行烧结时，PbZrO3埋料在高温下受热分解生成大量的氧分子，从而形成局部饱和蒸气压，在烧结初期能够促进蒸发‑凝聚传质，使得烧结品致密化速率加快；三氧化二铝粉在烧结温度下稳定存在，提供温度均匀的烧结环境；本发明在相对富氧且温度均匀的条件下烧结的，烧结得到的样品的晶粒大小均匀，微结构较为致密；而铅过量和烧结条件的控制，可以较为精确的控制烧结制品中的Pb和Hf的化学计量比，使之更加接近1：1。本发明制备工艺简单，成本较低，重复性较好。
Lead hafnate antiferroelectric ceramic material and preparation method thereof
The invention discloses a lead hafnate antiferroelectric ceramic material and a preparation method thereof, and belongs to the field of antiferroelectric ceramic materials. According to the preparation method disclosed by the invention, preparation is carried out by combining excessive lead and a three-layer crucible sintering method, and when the three-layer crucible sintering method is used for sintering, the PbZrO3 embedded material is heated and decomposed at a high temperature to generate a large number of oxygen molecules, so that local saturated vapor pressure is formed, evaporation, condensation and mass transfer can be promoted at the initial stage of sintering, and the densification rate of a sintered product is increased; the aluminum oxide powder stably exists at the sintering temperature, and a sintering environment with the uniform temperature is provided; according to the method, sintering is carried out under the conditions of relative oxygen enrichment and uniform temperature, the grain size of a sample obtained through sintering is uniform, and the microstructure is compact; and the stoichiometric ratio of Pb to Hf in the sintered product can be accurately controlled by controlling excessive lead and sintering conditions, so that the stoichiometric ratio is closer to 1: 1. The preparation method is simple in preparation process, low in cost and good in repeatability.
本发明公开了一种铪酸铅反铁电陶瓷材料及其制备方法，属于反铁电陶瓷材料领域。本发明的制备方法，采用铅过量和三层坩埚烧结法相结合进行制备，使用三层坩埚烧结法进行烧结时，PbZrO3埋料在高温下受热分解生成大量的氧分子，从而形成局部饱和蒸气压，在烧结初期能够促进蒸发‑凝聚传质，使得烧结品致密化速率加快；三氧化二铝粉在烧结温度下稳定存在，提供温度均匀的烧结环境；本发明在相对富氧且温度均匀的条件下烧结的，烧结得到的样品的晶粒大小均匀，微结构较为致密；而铅过量和烧结条件的控制，可以较为精确的控制烧结制品中的Pb和Hf的化学计量比，使之更加接近1：1。本发明制备工艺简单，成本较低，重复性较好。
Lead hafnate antiferroelectric ceramic material and preparation method thereof
一种铪酸铅反铁电陶瓷材料及其制备方法
WAN HONGYAN (Autor:in) / LIU ZENGHUI (Autor:in) / LI JINGRUI (Autor:in) / YANG HAO (Autor:in) / REN WEI (Autor:in) / YE ZUOGUANG (Autor:in)
09.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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