2025/09/03
September 3, 2025, is a date etched deep in the collective memory of the Chinese nation. This morning, the grand military parade commemorating the 80th anniversary of the victory of the Chinese People’s War of Resistance Against Japanese Aggression and the World Anti-Fascist War was solemnly held at Tiananmen Square in Beijing, drawing nationwide attention and global瞩目. To inspire patriotic enthusiasm and national pride among all employees and to unite them in a powerful spirit of solidarity and progress, Henan Yeda New Materials Technology Co., Ltd. convened its staff at 9:00 a.m. in the company conference room to watch live the majestic and profoundly significant parade.
2024/05/07
To enliven the cultural and recreational lives of company employees and foster a spirit of unity, collaboration, and tenacious progress, in anticipation of the May Day holiday, Yeda New Materials’ Zhengzhou, Henan, and Linfen, Shanxi offices organized fun-filled activities for all staff to celebrate the occasion.
2024/03/20
To further care for and safeguard the physical and mental well-being of employees, strengthen occupational health monitoring and management, and make every effort to prevent and control occupational diseases, the company organized the 2024 annual employee health checkups and occupational health examinations on March 19.
2023/11/18
Among natural corundum minerals, white fused alumina micron powder, brown fused alumina grain‑size abrasive, and black fused alumina abrasives rank just below diamond abrasives in hardness. These materials—white fused alumina micron powder, brown fused alumina grain‑size abrasive, and black fused alumina (Al₂O₃)—belong to the trigonal crystal system; their crystals exhibit a transition from ionic to covalent bonding and possess a relatively compact structure. Individual crystals typically occur as drum‑shaped or columnar forms, while aggregates appear granular or densely massive. The color is generally bluish‑gray or yellowish‑gray, with iron‑bearing varieties appearing black. They display a vitreous luster, have a Mohs hardness of 9, and lack cleavage. Twinning often gives rise to cleavage planes along {0001} or {101}. Their density ranges from 3.95 to 4.10 g/cm³, and they are chemically stable. When chromium‑containing specimens exhibit a red hue, they are referred to as rubies; those containing titanium and displaying a blue color are called sapphires.
2023/11/14
Where is silicon carbide mainly used?
Silicon carbide is produced by high‑temperature smelting in an electric resistance furnace, using raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips (with the addition of common salt when producing green silicon carbide).
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