Aredes Rangel G, Antonelli Eduardo, Neto Lauro P Silva, Rossi Jose O, Lima Gustavo N, Barroso Joaquim J, Rangel Elizete G L, Schamiloglu Edl
IEEE Trans Ultrason Ferroelectr Freq Control. 2023 Aug;70(8):885-892. doi: 10.1109/TUFFC.2023.3282625. Epub 2023 Aug 2.
Ferroelectric perovskite ceramics with a high dielectric constant, low loss, high tunability, and high electric breakdown are ideal for nonlinear transmission lines (NLTLs) to generate radio frequency (RF) signals at high-power levels. To achieve the required properties, a comprehensive study of the material phase transitions and the optimal ratio adjustment between the chemical elements in the perovskite crystal structure is required. The advancement of this solid-state technology is the most promising optimization for NLTLs in developing high-power (>100 MW) devices with high tunability (>60%) and high repetition rate (>1 kHz) for soliton generation. The barium strontium zirconium titanate (BSZT) ceramic compositions were synthesized and characterized to maximize material tunability. The composition Ba0.97Sr0.03Zr0.2Ti0.8O3 exhibited a high permittivity (>12200), low loss tangent (< 0.01), and an exceptional tunability of the order of 79% at an electric field of 10 kV/cm near the phase temperature transition at 300 K. Ferroelectric ceramic is an outstanding material with promising characteristics for producing RF signals in an NLTL, and here, the BSZT is considered for this application.
具有高介电常数、低损耗、高可调性和高电击穿强度的铁电钙钛矿陶瓷是用于非线性传输线（NLTL）以在高功率水平下产生射频（RF）信号的理想材料。为了实现所需的性能，需要对材料的相变以及钙钛矿晶体结构中化学元素之间的最佳比例调整进行全面研究。这种固态技术的进步是在开发用于孤子产生的具有高可调性（>60%）和高重复率（>1kHz）的高功率（>100MW）器件时对NLTL最有前景的优化。合成并表征了钡锶锆钛酸（BSZT）陶瓷组合物，以最大化材料的可调性。组合物Ba0.97Sr0.03Zr0.2Ti0.8O3在300K附近的相温度转变点处，在10kV/cm的电场下表现出高介电常数（>12200）、低损耗正切（<0.01）以及约79%的优异可调性。铁电陶瓷是一种具有出色特性的材料，有望用于在NLTL中产生RF信号，在此，考虑将BSZT用于此应用。
