Ceramic Industry

Ceradyne to Update Investors in Teleconference (posted 11/21/07)

November 21, 2007

Ceradyne, Inc. will host a teleconference to update investors on the overview of both its short- and longer-term outlook. Ceradyne management feels that this teleconference would be helpful to answer investor questions. Topics to be covered include the company’s 2007 and 2008 guidance, the status of the vehicle armor program (the BULL™ in particular), body armor opportunities (including the company’s outlook on XSAPI and ESAPI), increased demand for solar related ceramic crucibles, the positive performance of Ceradyne’s 2007 acquisitions of Minco and EaglePicher Boron, and other non-military opportunities.

Any investor or interested individual can listen to the teleconference, which is scheduled to begin at 8 a.m. PST (11 a.m. EST) on November 27, 2007. To participate in the teleconference, call (877) 717-3046 or (706) 634-6364 approximately 10 minutes prior to the start time.

The teleconference will also be available live via the Internet at www.ceradyne.com or www.earnings.com. For those unable to attend, these websites will host an archive of the call. A telephone playback will be available beginning at 11 a.m. PST on November 27 through 9 p.m. PST on November 29, 2007. The playback can be accessed by calling (800) 642-1687 or (706) 645-9291 and providing Conference ID 25428976.

Visit www.ceradyne.com for additional information.