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Crystallization and Morphology of Pb0.92La0.08(Zr0.68Ti0.32)0.98O3 Powders Synthesized Using the Gel-Hydrothermal Process
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-05-28 , DOI: 10.1002/crat.202100053 Xingsheng Zong 1 , Xiyun He 2 , Xia Zeng 2 , Pingsun Qiu 2 , Liang Ling 2 , Ying Shi 1
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-05-28 , DOI: 10.1002/crat.202100053 Xingsheng Zong 1 , Xiyun He 2 , Xia Zeng 2 , Pingsun Qiu 2 , Liang Ling 2 , Ying Shi 1
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Pure perovskite Pb0.92La0.08(Zr0.68Ti0.32)0.98O3 (PLZT (8/68/32)) crystal powders with good dispersibility are prepared by using gel-hydrothermal method. The effects of mineralizer concentration, hydrothermal treatment time, and excess lead content on powder crystallization and morphology are examined and analyzed. The suitable mineralizer concentration and hydrothermal treatment time are found to be helpful to promote the PLZT crystal powders growth and improve the particle surface morphology. Noticeably, the introduction of excessive Pb can well compensate for the lack of A-site ions in the solution, thereby promoting the formation of rhombohedral PLZT crystal powders. The following optimized hydrothermal conditions are established: the temperature ≈230 °C, the mineralizer concentration ≈2 m, the hydrothermal treatment time ≈24 h, and the amount of excess Pb ≈ 80%. The obtained PLZT crystal powders with clean and complete cube morphology, uniform particle size, and excellent dispersibility would be used as the crystal seeds applying in the seed-induced growth of PLZT ceramics.
中文翻译：
凝胶-水热法合成的Pb0.92La0.08(Zr0.68Ti0.32)0.98O3粉末的结晶和形貌
纯钙钛矿 Pb 0.92 La 0.08 (Zr 0.68 Ti 0.32 ) 0.98 O 3采用凝胶-水热法制备了分散性好的(PLZT(8/68/32))晶体粉末。检查和分析矿化剂浓度、水热处理时间和过量铅含量对粉末结晶和形态的影响。发现合适的矿化剂浓度和水热处理时间有助于促进PLZT晶体粉末的生长并改善颗粒表面形貌。值得注意的是，过量Pb的引入可以很好地补偿溶液中A位离子的缺乏，从而促进菱面体PLZT晶体粉末的形成。下列优化的水热条件被建立：温度≈230℃时，矿化剂浓度≈2米，水热处理时间≈24小时，过量Pb量≈80%。获得的PLZT晶体粉末具有干净完整的立方体形态、粒径均匀、分散性好，可作为晶种应用于PLZT陶瓷的晶种诱导生长。
更新日期：2021-05-28
中文翻译：
凝胶-水热法合成的Pb0.92La0.08(Zr0.68Ti0.32)0.98O3粉末的结晶和形貌
纯钙钛矿 Pb 0.92 La 0.08 (Zr 0.68 Ti 0.32 ) 0.98 O 3采用凝胶-水热法制备了分散性好的(PLZT(8/68/32))晶体粉末。检查和分析矿化剂浓度、水热处理时间和过量铅含量对粉末结晶和形态的影响。发现合适的矿化剂浓度和水热处理时间有助于促进PLZT晶体粉末的生长并改善颗粒表面形貌。值得注意的是，过量Pb的引入可以很好地补偿溶液中A位离子的缺乏，从而促进菱面体PLZT晶体粉末的形成。下列优化的水热条件被建立：温度≈230℃时，矿化剂浓度≈2米，水热处理时间≈24小时，过量Pb量≈80%。获得的PLZT晶体粉末具有干净完整的立方体形态、粒径均匀、分散性好，可作为晶种应用于PLZT陶瓷的晶种诱导生长。
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