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Nanometer powder sintered BST-based perovskite structure ceramic
The invention discloses a nano-powder sintered BST-based perovskite structural ceramic material and a preparation method thereof, the general formula of the perovskite structural ceramic material is (Ba1xySrxGdy) (Ti1uvwMMnYvYbw) O3, 0.2 < = x < = 0.4, 0 < = y < = 0.003, 0 < = u < = 0.006, 0 < = v < = 0.02, and 0 < = w < = 0.003. The preparation method comprises the following steps: pre-sintering dry gel powder of BST-based perovskite structural ceramic obtained by a citric acid sol-gel method at 700-900 DEG C for 2-4 hours to obtain nano powder, and carrying out granulation, tabletting, glue removal, sintering, silver firing and other processes to prepare the ceramic material. The result shows that the BST-based perovskite structure ceramic material is obtained at the sintering temperature of 1100-1200 DEG C, the intrinsic pyroelectric coefficient of the BST-based perovskite structure ceramic material reaches the maximum value gamma int = 0.74 [mu] C/(cm < 2 >. K) at the temperature close to 13 DEG C, and the BST-based perovskite structure ceramic material is uniform and compact in crystal grain and sufficient in crystallization.
本发明公开了一种纳米粉体烧结的BST基钙钛矿结构陶瓷材料及其制备方法，该钙钛矿结构陶瓷的通式为(Ba1‒x‒ySrxGdy)(Ti1‒u‒v‒wMnuYvYbw)O3表示，0.2≤x≤0.4，0≤y≤0.003,0≤u≤0.006,0≤v≤0.02，0≤w≤0.003。采用柠檬酸溶胶‑凝胶法得到的BST基钙钛矿结构陶瓷的凝胶干粉在700~900°C预烧2~4 h得到纳米粉体，再经过造粒、压片、排胶、烧结、烧银等工艺制备陶瓷材料。结果表明，在1100~1200°C的烧结温度下得到了BST基钙钛矿结构陶瓷材料，其其本征热释电系数在13°C附近达到最高值γint=0.74μC/(cm2·K)，晶粒均匀、晶粒致密、结晶充分。
Nanometer powder sintered BST-based perovskite structure ceramic
The invention discloses a nano-powder sintered BST-based perovskite structural ceramic material and a preparation method thereof, the general formula of the perovskite structural ceramic material is (Ba1xySrxGdy) (Ti1uvwMMnYvYbw) O3, 0.2 < = x < = 0.4, 0 < = y < = 0.003, 0 < = u < = 0.006, 0 < = v < = 0.02, and 0 < = w < = 0.003. The preparation method comprises the following steps: pre-sintering dry gel powder of BST-based perovskite structural ceramic obtained by a citric acid sol-gel method at 700-900 DEG C for 2-4 hours to obtain nano powder, and carrying out granulation, tabletting, glue removal, sintering, silver firing and other processes to prepare the ceramic material. The result shows that the BST-based perovskite structure ceramic material is obtained at the sintering temperature of 1100-1200 DEG C, the intrinsic pyroelectric coefficient of the BST-based perovskite structure ceramic material reaches the maximum value gamma int = 0.74 [mu] C/(cm < 2 >. K) at the temperature close to 13 DEG C, and the BST-based perovskite structure ceramic material is uniform and compact in crystal grain and sufficient in crystallization.
本发明公开了一种纳米粉体烧结的BST基钙钛矿结构陶瓷材料及其制备方法，该钙钛矿结构陶瓷的通式为(Ba1‒x‒ySrxGdy)(Ti1‒u‒v‒wMnuYvYbw)O3表示，0.2≤x≤0.4，0≤y≤0.003,0≤u≤0.006,0≤v≤0.02，0≤w≤0.003。采用柠檬酸溶胶‑凝胶法得到的BST基钙钛矿结构陶瓷的凝胶干粉在700~900°C预烧2~4 h得到纳米粉体，再经过造粒、压片、排胶、烧结、烧银等工艺制备陶瓷材料。结果表明，在1100~1200°C的烧结温度下得到了BST基钙钛矿结构陶瓷材料，其其本征热释电系数在13°C附近达到最高值γint=0.74μC/(cm2·K)，晶粒均匀、晶粒致密、结晶充分。
Nanometer powder sintered BST-based perovskite structure ceramic
一种纳米粉体烧结的BST基钙钛矿结构陶瓷
LIU HONG (author) / ZHU JIANGUO (author) / ZHANG WEN (author)
2022-12-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME