Microwave dielectric ceramics, owing to their ability to serve as dielectrics in microwave circuits, are widely used in communications, navigation, radar, satellite, and other fields as a key foundational material in modern communications technology. Grounded in an analysis of the current state of microwave dielectric ceramics and their corresponding industry both in China and abroad, this study identifies the challenges faced in the development of these ceramics in China and proposes a strategy for the independent development of microwave dielectric ceramics, encompassing development goals, strategies, key directions, and a development roadmap. The study aims to promote the development of microwave dielectric ceramics, facilitate the shift of the product structure from mid- to high-end products, and achieve breakthroughs in high-performance microwave dielectric ceramics preparation techniques and the independent production of upstream high-purity raw materials. Recommendations for research include strengthening the basic research and application foundations of microwave dielectric ceramics, enhancing innovative research and development in key areas of microwave communications, actively planning for 6G dielectric ceramics, and strengthening the development of the industry's ecosystem.

The solid-state battery is crucial for achieving the next-generation batteries that possess high energy density, high safety, long service life, and low cost. Major countries and regions are rapidly advancing the research and industrial application of solid-state batteries. This study reviews the development status of key material systems for solid-state batteries worldwide from the aspects of technological, industrial, and supporting systems. It analyzes the technical development paths, industrial scales, and supporting systems of solid-state batteries in countries and regions including the United States, Europe, Japan, and Republic of Korea, and summarizes the development status and goals of the key material system for solid-state batteries in China. Our study reveals that the solid-state batteries are currently in a promotion stage in China, facing challenges in terms of key raw materials, breakthroughs in critical scientific and technological bottlenecks, mass production, and industrial application. To promote the development of solid-state batteries in China, we propose the following suggestions: (1) adhering to an overall staged-development strategy for solid-state batteries, (2) establishing national-level development programs and major scientific and technological projects for solid-state batteries, (3) promoting the construction of technology research and development institutions for solid-state batteries, (4) encouraging the market application and industrial transformation of solid-state batteries, and (5) optimizing the solid-state battery ecosystem.

High-performance polymers have become a strategic material to ensure national security and national economic development owing to their excellent comprehensive properties. They have been widely applied in important fields such as aerospace, electronics, and medical devices. This study reviews the key varieties of high-performance polymers in four categories: high-performance resins and engineering plastics, organic fibers, bio-based resins and degradable materials, and special rubber and elastomers. The current status and characteristics of key high-performance polymers in China and abroad are analyzed. The study revealed that an industrialization system, including chemical raw material synthesis, modification, and product application, has been established in China. Besides, the current development challenges like the insufficient supply of key raw materials and limited development and application of products are discussed. Accordingly, relevant suggestion for technological innovation, key raw material security, and industrial innovation consortia construction are proposed, paving the way for the development of high-performance polymers in China.

Steel scraps are renewable resources and indispensable iron resources for the iron and steel industry. In the context of carbon peaking and carbon neutrality, it is crucial to reconstruct the technology system for steel scrap recycling and utilization and innovate the management mode of steel scrap resources, so as to fundamentally crack the bottleneck of high-quality recycling and utilization of steel scraps for the green and low-carbon transformation of the iron and steel industry. This study analyzes the development status of the global steel scrap industry by comparison, predicts the changing trend of raw steel output and steel scrap resources in China, and proposes the possible existence of full steel scrap smelting in China around 2060. Moreover, the development directions of standardization, informatization, digitalization, and intelligentization of the steel scrap industry are summarized. The pressing problems and challenges regarding steel scrap recycling and utilization in China are systematically sorted out in terms of standards and institutional system, precise classification and recycling, material design based on extended producer responsibility (EPR), and digital identity parsing. On this basis, a new "4F5Z" pattern is innovatively proposed for the high-quality recycling and utilization of steel scrap resources, and its organizational framework and implementation strategy are clearly given. Specifically, the EPR system should be implemented in a coordinated manner toward a possible era of full steel scraps and from the aspects of the full life cycle, full production process, and full industrial chain ("4F") of steel materials, thus to realize the sorted management, recycling, and reuse of steel scrap resources. Meanwhile, the digitalization, informatization, labelling, and networking of full production process management should be strengthened and gradually transition to the robotization of high-quality steel scrap dismantling and recycling ("5Z"). Furthermore, to provide a solid guarantee for the full implementation of the "4F5Z" pattern, we propose the following suggestions: (1) improving the system, technology, and management for EPR implementation in the iron and steel industry, (2) strengthening the construction of a standards system for the steel scrap industry, (3) strengthening the digital labelling and analysis of the entire industrial chain and the whole life cycle of iron and steel materials, and (4) reinforcing the sorted collection, recycling, and reuse of steel scraps in key industries.