Stable Isotopes

China has reported a major step in the race to build silicon-based quantum chips, with a new production breakthrough centered on silicon-28. The material is seen as one of the most important foundations for reducing noise in quantum systems and improving long-term stability. The China National Nuclear Corporation said its researchers have, for the first time, achieved independent mass production of silicon-28 with an abundance level above 99.99 percent. That result strengthens China’s ability to develop a more self-reliant supply chain for quantum materials based on silicon. Why silicon-28 matters Silicon-28 is a stable silicon isotope and is regarded as a core material for silicon-based quantum chips. It is often described as the “purest silicon” because of its ability to significantly reduce environmental noise in quantum computing. Environmental noise remains one of the biggest obstacles in quantum systems because it can interfere with the stability and accuracy of qubit operations. For that reason, control over ultra-high-purity silicon-28 is considered a key step toward better performance and scalability in quantum chip technology. Yu Dapeng, an academic at the Chinese Academy of Sciences, said the breakthrough opens the door for China to achieve scalable qubit control in silicon-based quantum computing. His assessment points to impact beyond materials alone and into the wider capability of quantum systems. From laboratory progress to industrial use The achievement is expected to support the independent development of core materials for silicon-based quantum computing in China. Experts also believe it could strengthen advanced semiconductor manufacturing, high-end navigation, and measurement benchmarks. That means the value of silicon-28 production extends far beyond quantum research. The material may also support precision technology sectors that depend on extremely high standards for materials and measurement. The work was carried out by the Institute of Nuclear Industry Physics and Chemistry Research, known as RIPCENI. The institute is affiliated with China Nuclear Energy Industry Corp., which operates under CNNC. The progress was described as the result of many years of sustained effort. Lei Zengguang, an academic at the Chinese Academy of Engineering, said the path from early research to mass production of high-purity silicon-28 is a historic milestone. Part of a broader isotope strategy The silicon-28 advance also reflects a wider direction in China’s development of stable isotope technologies. According to experts, stable isotopes have irreplaceable value in fields ranging from nuclear medical imaging and precision radiotherapy to environmental tracing and basic physics research. Within that broader context, silicon-28 shows how isotope materials can serve both cutting-edge technologies and wider industrial needs. Stable isotope development is not only relevant to laboratories, but also to manufacturing ecosystems and strategic applications. RIPCENI said its research and development in stable isotope engineering and industrialization has so far produced 26 types of stable isotopes from 12 elements. Those elements include molybdenum, tellurium, nickel, zinc, silicon, and ytterbium. That record shows the silicon-28 milestone is not an isolated project. It is part of a larger isotope technology portfolio that can support a wide range of scientific and industrial demands. What comes next After achieving independent mass production of silicon-28, RIPCENI researchers now plan to focus on developing a new range of stable isotope products. The effort is aimed at meeting strong demand across several strategic sectors. The fields listed include nuclear energy, nuclear medicine, aerospace, quantum information, particle physics, and space exploration. That plan positions isotope materials as cross-sector infrastructure for science and technology. With mass production of silicon-28 at an abundance level above 99.99 percent, China has taken a stronger position in the development of materials for silicon-based quantum chips. At the same time, the breakthrough underscores the role of stable isotopes as a foundation for the next generation of precision technologies.

China’s Ultra-Pure Silicon-28 Breakthrough Could Accelerate Quantum Chip Independence