High temperature SOFCs and sensors need electrolyte materials with high mechanical strength and thermal shock resistance for secure assembly and reliable service. These materials can be produced economically from commercial coprecipitated hydroxide powders using a special pretreatment, including heating and wet comminution to prevent mixing of stabilizing agents. Sintered ceramic bodies show high fracture toughness and strength, and the toughness-to-strength ratio becomes much higher. Such

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... nical behavior ensures the ultimate in thermal shock resistance as well as mechanical and thermal endurance.