Mitsui Mining & Smelting patented a negative thermal expansion material represented by Zr2-aMaSxP2O12+d, with M as Sn and a as 0. This innovation allows for cost reduction and density reduction in producing negative thermal expansion materials. GlobalData’s report on Mitsui Mining & Smelting gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Mitsui Mining & Smelting, Hydrogen storage alloys was a key innovation area identified from patents. Mitsui Mining & Smelting's grant share as of March 2024 was 47%. Grant share is based on the ratio of number of grants to total number of patents.

Negative thermal expansion material with reduced cost and density

Source: United States Patent and Trademark Office (USPTO). Credit: Mitsui Mining & Smelting Co Ltd

A recently granted patent (Publication Number: US11970396B2) discloses a negative thermal expansion material with a unique composition represented by Zr2-aMaSxP2O12+d, where M is Sn and a is 0. This material exhibits a negative thermal expansion coefficient, making it suitable for various applications requiring controlled thermal expansion properties. Additionally, the patent claims a specific range for the value of x (0.4=x=0.48) to optimize the material's performance.

Furthermore, the patent describes the creation of composite materials by combining the negative thermal expansion material with metals or resin materials having positive thermal expansion coefficients. The method for producing the negative thermal expansion material involves hydrothermal treatment of a mixture containing specific compounds at controlled temperatures, followed by baking to form the desired material. By controlling the parameters during the production process, such as the temperature for baking and hydrothermal treatment, the properties of the material can be tailored to meet specific requirements for different applications. This innovation opens up possibilities for the development of advanced materials with tailored thermal expansion properties for use in various industries.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.