In experiments involving planetary ball mills and roller ball mills, conventional grinding is typically carried out using planetary ball mill jars. These jars can be used for both dry and wet grinding. However, during the grinding process, it is impossible to prevent air from entering the jar, making it difficult to avoid reactions between the powder and air. Therefore, vacuum jars are applied in experiments requiring atmosphere-protected grinding. The vacuum atmosphere-protected ball mill jars produced by Changsha Miqi Technology are not only used for isolating air in single experiments but also for preventing oxygen exposure while avoiding sample contamination caused by wear from stainless steel jars. Depending on the specific experiment, the interior of the vacuum atmosphere-protected ball mill jar can be lined with various materials, such as corundum, zirconia, nylon, PTFE, polyurethane, agate, cemented carbide, silicon carbide, and more. The vacuum atmosphere-protected ball mill jars manufactured by Changsha Miqi adopt a high-seal combination of an inner liner jar and a vacuum jar sleeve, distinguishing them from the large-jar-within-a-small-jar design commonly found on the market.