It is shown that the linear thermal expansion coefficient (CLTE) for sitalls based on the lithium aluminosilicate system can be precisely controlled near values close to zero in the temperature range from –80 to +500°C. It was found that heat-treatment for several hours at temperatures corresponding to the stage of nucleation of a crystalline phase makes it possible, after a lengthy incubation period, to change the sign of the CLTE of sitall from positive to negative, while preserving its sign constancy in the entire temperature interval near zero values of the CLTE.

中文翻译：

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接近于零值的透明锂铝硅酸盐陶瓷线性热膨胀系数的精确控制可能性

结果表明，在–80至+ 500°C的温度范围内，基于铝硅酸锂系统的便衣的线性热膨胀系数（CLTE）可以精确控制在接近零的值附近。发现在与结晶相成核阶段相对应的温度下进行数小时的热处理，可以在漫长的温育期后将西塔尔的CLTE信号从正变为负，同时保留其正负号在整个温度间隔中，CLTE的恒定值接近零。