Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=41102144
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\41102144
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2025 ; 16
(1
): 9179
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
High-temperature oxide ceramic microwave absorber enabled by thermionic migration
mediated by electron delocalization
#MMPMID41102144
Cui R
; Duan Z
; Li Y
; Zhang X
; Liu X
; Yang G
; Yang L
; Zhao B
; Wan C
Nat Commun
2025[Oct]; 16
(1
): 9179
PMID41102144
show ga
The escalating demand for long-term high-temperature microwave-absorbing
materials (HTMAMs) in high-speed aerospace stealth is hindered by limitations
such as magnetic loss degradation or oxidation risks. Herein, we introduce rare
earth zirconate ceramics that exhibit air stability up to 1600?°C. Abundant
oxygen vacancies significantly enhance permittivity and thus microwave-absorbing
performance through activated thermionic migration at elevated temperatures.
Moreover, the thermionic-facilitated permittivity can be meticulously modulated
by electron delocalization, with the extent governed by lattice disorder. We
demonstrate this concept through a dual-layer Er(2)Zr(2)O(7)/Gd(2)Zr(2)O(7)
structure to further optimize impedance matching, achieving an ultra-wide
bandwidth (8.27?GHz) and strong absorption (-64.61?dB) at ultrathin thicknesses
under 1.2?mm at 600?°C mainly by macroscopic interfacial resonance, alongside an
ultralow thermal conductivity (1.61?W?m(-1)?K(-1)). This work presents an
innovative approach to design high-performance and anti-oxidative HTMAMs through
thermionic migration tuned by electron delocalization, advancing
structural-functional integrated materials for extreme environments.