High-temperature resistance temperature detectors (RTDs) are gaining significant attention for various promising applications, including aeroengines, steel metallurgy, and construction machinery. However, it remains a critical challenge in developing RTDs on curved metal substrates without involving high-cost and complicated manufacturing processes. Herein, a metal-based sandwich type thick-film platinum (Pt) RTD for in-situ temperature monitoring of hot-end components is developed through a facile and high-efficient tape mask process and direct ink writing (DIW) technology. The liquid-formed glass–ceramic insulating layer and protective layer effectively immobilize the Pt particles within a sandwich structure, resulting in adequate protection from volatilization and aggregation of the Pt sensitive layer. Meanwhile, the insulating/protective layer exhibits outstanding insulation performance. Additionally, the fabricated Pt RTD achieved excellent repeatability, ultra-high stability (with a temperature drift rate of 0.7%/h at 800 °C), and high accuracy (0.92% full-scale) in the range of 50–800 °C. As an application example, the Pt RTD was fabricated on the surface of a turbine blade to verify its functionality at temperatures up to 800 °C. The exceptional performance and flexible fabrication process indicate that the Pt RTD is a promising candidate for in-situ temperature monitoring of critical aeroengine components.

耐高温温度探测器 (RTD) 在航空发动机、钢铁冶金和建筑机械等各种有前景的应用中受到广泛关注。然而，在弯曲金属基板上开发 RTD 而不涉及高成本和复杂的制造工艺仍然是一个关键挑战。在此，通过简便高效的胶带掩模工艺和直接墨水写入（DIW）技术开发了一种用于热端部件原位温度监测的金属夹层型厚膜铂（Pt）RTD。液态玻璃陶瓷绝缘层和保护层有效地将铂颗粒固定在夹层结构内，从而充分保护铂敏感层免受挥发和聚集。同时，绝缘/保护层表现出优异的绝缘性能。此外，所制造的 Pt​​ RTD 在 50–800 °C 范围内实现了出色的重复性、超高稳定性（800 °C 时的温漂率为 0.7%/h）和高精度（0.92% 满量程） 。作为一个应用示例，Pt RTD 被制造在涡轮叶片的表面上，以验证其在高达 800 °C 的温度下的功能。卓越的性能和灵活的制造工艺表明，Pt RTD 是关键航空发动机部件现场温度监测的有前途的候选者。92% 满量程）在 50–800 °C 范围内。作为一个应用示例，Pt RTD 被制造在涡轮叶片的表面上，以验证其在高达 800 °C 的温度下的功能。卓越的性能和灵活的制造工艺表明，Pt RTD 是关键航空发动机部件现场温度监测的有前途的候选者。92% 满量程）在 50–800 °C 范围内。作为一个应用示例，Pt RTD 被制造在涡轮叶片的表面上，以验证其在高达 800 °C 的温度下的功能。卓越的性能和灵活的制造工艺表明，Pt RTD 是关键航空发动机部件现场温度监测的有前途的候选者。