April 9, 2021: CAM, the Italian industrial automation engineering company, announced on March 16 that leady oxide from its CAM MOP 30 ball mill had been tested by the University of L’Aquila’s department of chemical engineering in Italy. The test results showed 87.8% tetragonal litharge [red lead], and 12.1% of [the unoxidized] lead, the firm said.
“The results were sensational,” said Francesco Marfisi, electrical manager at CAM.
“The first thing that jumped out at us was the complete absence of orthorhombic oxide — this is fantastic because it means that batteries produced with this oxide will be more reliable over time, with consistent performance.”
A tetragonal crystal structure allows the leady oxide to better adhere to the grid while orthorhombic crystals are more prone to flaking.
CAM said: “Our ball mills are the only mills that have an internal cooling system using water spray. By controlling the temperature inside the mill in a direct manner, you never have peaks of temperature which could cause the formation of orthorhombic crystals.”
“This is the only way to achieve 100% tetragonal oxide and the results of the University of L’Aquila confirm this,” said Marfisi
The university testing was done under the auspices of professor Giuliana Taglieri and research fellow Valeria Daniele.