On March 23, 2020, the international standard ISO 21713:2020 “Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of elastic modulus of ceramics at high temperature by thin wall C-ring method,” led by CTC, was officially released at ISO headquarters. 

This international standard is applicable to the high-temperature elastic modulus testing of special ceramic materials, including bulk fine ceramics, refractory materials, whiskers, particles, and fiber-reinforced ceramic composites, within the range from room temperature to 2200°C. In practical engineering applications, especially in aerospace and the defense industry, the evaluation of high-temperature mechanical properties of materials from room temperature to 2200°C is crucial for structural design and safety reliability in extreme environments. This standard is another case of international standardization of innovative technology by Professor Bao Yiwang, Chief Scientist of CTC. By combining the notched-ring method with the relative method, it effectively solves the technical difficulty of deformation measurement of special ceramics under ultra-high-temperature extreme environments, fills the technical gap at home and abroad, and has important practical significance for the service safety and optimal design of special ceramics.

The international standard ISO 21713 was successfully approved as a project in ISO/TC 206, the ISO technical committee for fine ceramics, through voting in September 2016. After more than three years, it went through multiple stages including NP, WD, CD, DIS, and FDIS. Research institutions from Japan and other countries were invited to conduct round-robin comparative experiments for verification. Through four international meeting discussions and more than one hundred email exchanges, the working group analyzed the feedback from peer experts and revised the standard text, ultimately gaining unanimous recognition.

As a high-tech enterprise in the inspection and certification field, CTC has always attached great importance to international standardization work. The successful publication of this international standard has enhanced China's international discourse power, effectively improved the scientific and technological influence, innovation capability, and core competitiveness of CTC's testing services, and promoted the better and stronger future development of CTC.