Ceradyne, Inc.'s Semicon Associates Division Acquires New Ceramic Impregnated Dispenser Cathode Technology

   Ceradyne, Inc. (NASDAQ: CRDN) has acquired intellectual property for producing a controlled porosity ceramic impregnated dispenser cathode using a patented "sintered wire" technology. This intellectual property was acquired from Calabazas Creek Research based in San Mateo, California.

Semicon Associates, a division of Ceradyne, Inc., has been producing ceramic impregnated dispenser cathodes for over 55 years using more mature porous tungsten powder technology. The basis of this departure from traditional methodology is intended to result in a significantly longer life with a more controlled electron beam. Semicon will be shipping prototypes of this new cathode to several of its customers for evaluation in the next few months.

Jeffrey Waldal, Ceradyne Corporate Vice President and President of Semicon Associates, commented, "I am very excited about this acquisition. The new sintered wire technology can produce over ten times the current density and extend life by two to four times when compared to the present state-of-the-art dispenser cathodes. We look forward to a continued working relationship with Calabazas Creek Research and to playing a pivotal role in advancing microwave tube technology."

The advances in microwave tube performance that this "sintered wire" technology produces is predicated on a "reservoir" of the barium based ceramic and a controlled distributed porosity. The result is a long life due to the presence of additional barium and a uniform emission even as the cathode ages. These qualities are prime considerations in modern microwave tube design for military and communication applications.

Dispenser cathodes are used in a variety of vacuum electron devices and in inert and reducing atmospheres. The most common end-use applications include military electronic counter measures, satellite and other communication devices, medical devices, and scientific research.

Lawrence Ives, President of Calabazas Creek Research, stated, "We are very pleased to find the perfect home for the sintered wire cathode technology. Semicon Associates' track record as a world leader in custom designed cathodes, along with their continuing emphasis on quality and performance, speaks for itself. We view this as the beginning of a long-term relationship as we work together to further extend the performance of sintered wire technology."

Information about Ceradyne, Inc.

Ceradyne develops, manufactures and markets advanced technical ceramic products and components for defense, industrial, automotive/diesel and commercial applications.

In many high performance applications, products made of advanced technical ceramics meet specifications that similar products made of metals, plastics or traditional ceramics cannot achieve. Advanced technical ceramics can withstand extremely high temperatures, combining hardness with light weight, are highly resistant to corrosion and wear, and often have excellent electrical capabilities, special electronic properties and low friction characteristics. Additional information can be found at the Company's web site: www.ceradyne.com.

Except for the historical information contained herein, this press release contains forward-looking statements regarding future events and the future performance of Ceradyne that involve risks and uncertainties that could cause actual results to differ materially from those projected. Words such as "anticipates," "believes," "plans," "expects," "intends," "future," and similar expressions are intended to identify forward-looking statements. These risks and uncertainties are described in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2009, and its Quarterly Reports on Form 10-Q, as filed with the U.S. Securities and Exchange Commission.