由于偏铝酸锂陶瓷材料具有耐高温、辐照稳定、氚的释放率低等优点,故被选作产氚靶件芯体。热导率是靶件设计的重要参数,我们用激光脉冲法测量了LiAlO_2在293—676K温度范围内的热扩散率(a),并计算了相应的热导率(λ),测量误差为 Lithium meta-aluminate ceramics have been selected as the target of tritium production because of their high temperature resistance, stable irradiation and low release rate of tritium. The thermal conductivity is an important parameter of the target design. The thermal diffusivity (a) of LiAlO_2 in the temperature range 293-676K was measured by laser pulse method, and the corresponding thermal conductivity (λ) was calculated. The measurement error was