1临床资料患者,男,65岁。因“车祸后腹部疼痛4 h”入遂宁市中心医院急诊科。查体:心率为124次/min,呼吸为20次/min,血压为74/46 mm Hg(1 mm Hg=0.133 k Pa),Sp O2为97%。嗜睡状,可遵嘱,对答尚切题。全身见散在瘀斑,以腹部及双大腿为著...1临床资料患者,男,65岁。因“车祸后腹部疼痛4 h”入遂宁市中心医院急诊科。查体:心率为124次/min,呼吸为20次/min,血压为74/46 mm Hg(1 mm Hg=0.133 k Pa),Sp O2为97%。嗜睡状,可遵嘱,对答尚切题。全身见散在瘀斑,以腹部及双大腿为著。导尿见鲜红色尿液流出。实验室检查:白细胞计数为28.9×10^(9)/L,血红蛋白为115 g/L,中性粒细胞比例为86.2%。展开更多
Inspired by increasing demand of advanced pulsed power capacitors,the development of lead-free dielectric ceramic capacitors with high energy storage density and temperature-insensitive performance are extremely cruci...Inspired by increasing demand of advanced pulsed power capacitors,the development of lead-free dielectric ceramic capacitors with high energy storage density and temperature-insensitive performance are extremely crucial.Herein,the lead-free relaxor ferroelectric ceramics based on(1-x)(Na_(0.5)Bi_(0.5))0.6Sr_(0.4)TiO_(3-x)Sr_(0.7)La_(0.2)ZrO_(3)[abbreviated as(1-x)NBST-xSLZ]are prepared by the solid-state reaction route.The large recoverable energy density(Wrec)of 3.45 J/cm^(3) and efficiency(h)of 90.1%are simultaneously realized in 0.86NBST-0.14SLZ ceramic due to increased breakdown strength.Furthermore,both the Wrec and h of 0.86NBST-0.14SLZ ceramic display superior of thermal stability(20e180C),frequency stability(1e1000 Hz),and cycle stability(10^(4))within a satisfactory range of variation.In addition,the 0.86NBST-0.14SLZ ceramic can also achieve a large current density(CD)of 625 A/cm^(2),an ultrahigh power density(PD)of 50 MW/cm^(3) and a fast discharge rate(t0.90)of 160.8 ns at 160 kV/cm.These results demonstrate that the 0.86NBST-0.14SLZ ceramic could be a highly competitive and ecofriendly relaxor ferroelectric material for next-generation pulsed power capacitors.展开更多
文摘1临床资料患者,男,65岁。因“车祸后腹部疼痛4 h”入遂宁市中心医院急诊科。查体:心率为124次/min,呼吸为20次/min,血压为74/46 mm Hg(1 mm Hg=0.133 k Pa),Sp O2为97%。嗜睡状,可遵嘱,对答尚切题。全身见散在瘀斑,以腹部及双大腿为著。导尿见鲜红色尿液流出。实验室检查:白细胞计数为28.9×10^(9)/L,血红蛋白为115 g/L,中性粒细胞比例为86.2%。
基金supported by the National Nature Science Foundation of China(Grant No.51902167)Zhejiang Province Nature Science Foundation of China(Grant No.LY21E020002)+1 种基金Ningbo Nature Science Foundation of China(Grant No.2019A610001)Key Laboratory of Engineering Dielectrics and Its Application(Harbin University of Science and Technology),Ministry of Education.
文摘Inspired by increasing demand of advanced pulsed power capacitors,the development of lead-free dielectric ceramic capacitors with high energy storage density and temperature-insensitive performance are extremely crucial.Herein,the lead-free relaxor ferroelectric ceramics based on(1-x)(Na_(0.5)Bi_(0.5))0.6Sr_(0.4)TiO_(3-x)Sr_(0.7)La_(0.2)ZrO_(3)[abbreviated as(1-x)NBST-xSLZ]are prepared by the solid-state reaction route.The large recoverable energy density(Wrec)of 3.45 J/cm^(3) and efficiency(h)of 90.1%are simultaneously realized in 0.86NBST-0.14SLZ ceramic due to increased breakdown strength.Furthermore,both the Wrec and h of 0.86NBST-0.14SLZ ceramic display superior of thermal stability(20e180C),frequency stability(1e1000 Hz),and cycle stability(10^(4))within a satisfactory range of variation.In addition,the 0.86NBST-0.14SLZ ceramic can also achieve a large current density(CD)of 625 A/cm^(2),an ultrahigh power density(PD)of 50 MW/cm^(3) and a fast discharge rate(t0.90)of 160.8 ns at 160 kV/cm.These results demonstrate that the 0.86NBST-0.14SLZ ceramic could be a highly competitive and ecofriendly relaxor ferroelectric material for next-generation pulsed power capacitors.
