Domestic 99.99% high-purity calcium carbonate, making a breakthrough!

Who broke through first? In 2026, domestic high-purity calcium carbonate finally achieved a milestone breakthrough! Ningbo Songsheng New Material Technology Co., Ltd.'s production line for 20,000 tons of electronic-grade ultra-high-purity calcium carbonate is expected to officially commence production in August, becoming the first high-tech enterprise in China to achieve large-scale production of 4N-grade (purity over 99.99%) calcium carbonate, completely breaking the long-term overseas monopoly.

Ningbo Songsheng New Material Technology Co., Ltd. (established on August 11, 2025, under the umbrella of Ningbo Defeng Technology) is located in Ningbo, Zhejiang Province, specializing in the research, development, and production of high-end food additives and high-purity inorganic functional materials. Its core products cover food-grade and electronic-grade calcium powder, including food calcium carbonate, light calcium carbonate, calcium hydroxide, calcium oxide, and other ultra-high purity calcium powders. It supports customization of 3N, 4N, and 5N high-purity powders according to customer requirements. It provides stable domestic supply chain support for downstream industries such as electronic ceramics, new energy, and semiconductors.

How did you break out?

 Relying on the doctoral research and development team from Fudan University in Shanghai, Songsheng New Materials has achieved systematic breakthroughs in raw materials, processes, and products after 10 years of technological breakthroughs and process iterations. In terms of raw materials, Songsheng has bid farewell to the curse of high costs, no longer relying on imported raw materials. Ordinary calcium carbonate can be used for production, significantly reducing supply chain risks and gaining market pricing power. Songsheng has successfully overcome core technical challenges such as high-purity purification, precise particle size control, and low impurity control, achieving large-scale production of 4N and 5N electronic-grade calcium carbonate, successfully filling the domestic market gap.

Why "All-round Breakout"?

 In terms of technology, breakthroughs have been made in raw materials, processes, product specifications, and applications.

 Raw material side: Guo Yongsong, Chairman of Songsheng New Materials, stated that the company's production of high-purity calcium carbonate has no special requirements for raw materials, and ordinary calcium carbonate raw materials can be used for production. The core pain point of relying on imports for traditional high-end, high-purity powders often lies in "high costs". The only thing that needs to be strengthened on the raw material side is the technical barrier. Without the burden of resource supply on the production line, participating in the competition in the high-purity powder material market has a significant cost advantage, which largely controls the pricing power.

 Process side: Relying on proprietary intellectual property technology, Songsheng New Materials has achieved refined and clean production of high-purity calcium carbonate, overcoming core technical challenges such as high-purity purification, precise particle size control, and low impurity management. Taking low impurity management technology as an example, Songsheng New Materials can control the content of impurity elements in limestone through precise impurity removal technology. By controlling individual impurity elements, it can achieve both controllable particle size and controllable impurity content, allowing for customized products according to different application needs.

In terms of production capacity, the issue of the small scale of the high-purity calcium carbonate production line has been addressed, with the production capacity being increased from 3N kiloton level to 4N ten-thousand-ton level.

 According to an investigation conducted by Guo Yongsong, Chairman of Songsheng New Materials, currently, only a few companies in the world, including Japan and Songsheng New Materials, possess significant supply capabilities on a large scale. As learned by the editor of Powder.com, there are currently few production lines for high-purity light calcium carbonate in China, with a production capacity mainly at the 3N kiloton level. However, there are indeed no clear reports on production lines for 4N ultra-high purity light calcium carbonate, and a 10,000-ton production line directly breaks the current upper limit of production capacity design and significantly changes the production mode and supply pattern of 4N and 5N ultra-high purity calcium carbonate. The reason for this cannot be separated from Songsheng New Materials' 10 years of research and development experience and its R&D investment of over 20%.  

 At the market level, Songsheng New Materials' 4N5N calcium carbonate has been sent to a well-known domestic electronic ceramic, chip packaging, and new energy enterprise for sample testing. In the future, Songsheng also plans to deeply explore the high-purity calcium carbonate market in South Korea and Japan.

Songsheng New Material submits high-purity calcium carbonate for inspection

What is the significance of a comprehensive breakthrough?

 Addressing the development challenges of food, pharmaceutical, and ordinary high-purity calcium carbonate. Currently, the development of domestic food-grade and pharmaceutical-grade calcium carbonate (purity 98.5-99%) is significantly limited by the availability of raw materials and supply chain constraints. Ordinary purity calcium carbonate (purity ≤98.5%) faces challenges of high investment, high energy consumption, low profits, and price competition.  

 Songsheng New Materials' 20,000-ton electronic-grade calcium carbonate production line ensures a product purity consistently exceeding 99.99%, with an actual measurement of 99.990424%. The products are widely applicable in high-end manufacturing sectors such as chip packaging, electronic ceramics, optical lenses, aerospace, 5G communication, new energy, chemical testing, and life sciences.

 Conclusion: To facilitate the development of high-end manufacturing, the domestic substitution of key basic materials serves as the core support for the autonomy and controllability of high-end manufacturing, injecting vital momentum into China's high-end manufacturing sector. The breakthrough of domestically produced high-purity calcium carbonate marks not only a milestone for Songsheng New Materials but also an important step in the domestic substitution of key materials in China. The comprehensive breakthroughs in purity, particle size, and production capacity will ultimately bolster China's high-end manufacturing capabilities.