Radar-absorbing materials have long been associated with stealth fighters, cruise missiles and other high-end military platforms for which performance often comes at a high cost. But in China, some stealth coatings could be moving into large-scale industrial production and driving prices down fast. A team from Foshan University reported a low-cost microwave-absorbing composite made from expanded graphite and titanium dioxide, according to a peer-reviewed paper published in the Journal of...