Stealth technology holds immense significance in enhancing the survival prospects of targeted systems and assets, serving as a vital defensive shield against detection. In the wake of the swift advancements in multi-band detection technologies, multi-band stealth technology finds itself confronted with formidable challenges that necessitate relentless innovation and adaptation. Recognizing this imperative, this comprehensive article embarks on a thorough exploration of the stealth mechanisms operative within each spectral band, providing a nuanced understanding of their intricacies and how they contribute to the overall stealth capability. This article first comprehensively summarizes the stealth mechanism of each band. Then, the design methods of multi-band compatible stealth materials are summarized separately into single materials and composite materials. Finally, this article summarizes the latest developments in the field of multi-spectral compatible stealth materials technology, including infrared and radar compatible stealth materials, infrared and visible light compatible stealth materials, and infrared and laser compatible stealth materials, both domestically and internationally. Furthermore, the article provides valuable insights into the future trajectory and research priorities for the development of multi-spectral stealth materials. It identifies the emerging trends, challenges, and opportunities that lie ahead, offering a roadmap for scientists and engineers seeking to push the boundaries of stealth technology.

In energy generation, aerospace, and other related industries, high-temperature acceleration sensing is an essential tool for diagnostic testing, troubleshooting, and quality control. Currently, commercial acceleration sensors have a maximum operating temperature of no more than 550 °C. The study of high-temperature piezoelectric ceramics is important for increasing the operating temperature of sensors. In this work, high-temperature Bi₂Mo_xW_1−xO₆ (BW) piezoelectric ceramics were prepared, and an all-mechanical center compression high-temperature acceleration sensor was designed and fabricated. The results show that when the doping ratio is x = 0.001, the ceramic sample has the best performance: the relative density of 92%, the piezoelectric coefficient (d₃₃) of 15 pC·N⁻¹, the quality factor (Q_m) of 1642, the dielectric constant (ε) of 307 (1 kHz), and the dielectric loss (tanδ) of 0.33 (1 kHz). With increasing B-doped Mo⁶⁺ content, the Curie temperatures of the ceramics are 975, 966, 961, and 967 °C, and the high-temperature annealing temperatures are 975, 975, 950, and 950 °C, respectively. According to tests of temperature performance, the developed BW high-temperature sensor has a good linear response and sensitivity. At room temperature, a BW high-temperature piezoelectric sensor can be used stably within 1 kHz, and the average sensitivity is 3.259 pC·g⁻¹. At 800 °C, this device can be used in the frequency range of 0.1–1.1 kHz, and the average sensitivity is 3.305 pC·g⁻¹; the linearity is greater than 0.99, and the sensitivity deviation is 1.4%.

Low-dimensional piezoelectric and quantum piezotronics are two important branches of low-dimensional materials, playing a significant role in the advancement of low-dimensional devices, circuits, and systems. Here, we firstly propose a solid-phase sintering and vapor–liquid–solid growth (SS–VLS-like) method of preparing a quantum-sized oxide material, i.e., black phosphorus (BP)@MgO quantum dot (QD) crystal with a strong piezoelectric response. Quantum-sized MgO was obtained by Mg slowly released from MgB₂ within the confinement of a nanoflake BP matrix. Since the slow release of Mg only grows nanometer-sized MgO to hinder the further growth of MgO, we added a heterostructure matrix constraint: nanoflake BP. With the BP as the matrix confinement, MgO QDs embedded in the BP@MgO QD crystals were formed. These crystals have a layered two-dimensional (2D) structure with a thickness of 11 nm and are stable in the air. In addition, piezoresponse force microscopy (PFM) images show that they have extremely strong polarity. The strong polarity can also be proved by polarization reversal and a simple pressure sensor.