A new series of cerium-substituted Y₂W₃O₁₂ ceramics were first fabricated with the goal of tailoring the thermal expansion and reducing the hygroscopicity. Influence of cerium substitution on the structure, hygroscopicity and thermal expansion property of Y₂W₃O₁₂ ceramics were investigated using XRD, FESEM, HRTEM, XPS, TGA and TMA. Results indicate that the Y³⁺ can partly be substituted by Ce³⁺ in Y_2-xCe_xW₃O₁₂ ceramics and increasing substitution of Y³⁺ in Y₂W₃O₁₂ by Ce³⁺ results in the crystal structure change from orthorhombic to monoclinic. Single-phase Y_2-xCe_xW₃O₁₂ ceramics can be synthesized in the range of 0.0 ≤ x ≤ 0.25 with an orthorhombic Y₂W₃O₁₂-type crystal structure and 1.0 < x ≤ 2.0 with monoclinic Ce₂W₃O₁₂-type crystal structure, respectively. As the amount of substituted cerium increases, the hygroscopic phenomenon of Y_2-xCe_xW₃O₁₂ is significantly promoted, meanwhile the coefficient of thermal expansion gradually decreases. The linear coefficient of thermal expansion of Y_2-xCe_xW₃O₁₂ ceramics can be adjusted from −13.094 × 10⁻⁶ K⁻¹ to 2.327 × 10⁻⁶ K⁻¹ by changing the substituted amount of cerium. Moreover, Y_0.25Ce_1.75W₃O₁₂ does not absorb moisture in air and shows almost zero thermal expansion from 182 °C to 700 °C and its coefficient of thermal expansion is tested to be −0.820 × 10⁻⁶ K⁻¹. This low thermal expansion Y_0.25Ce_1.75W₃O₁₂ material may have great potential applications in manufacturing precision device in many fields.

首先制造了一系列新的铈取代的Y ₂ W ₃ O ₁₂陶瓷，目的是调整热膨胀并降低吸湿性。用XRD，FESEM，HRTEM，XPS，TGA和TMA研究了铈的取代对Y ₂ W ₃ O ₁₂陶瓷的结构，吸湿性和热膨胀性能的影响。结果表明，Y _{2- x} Ce _x W ₃ O ₁₂陶瓷中的Y ³⁺可以部分被Ce ³⁺取代，并且Y ₂ W中的Y ³⁺取代度增加。Ce ^3+的₃ O ₁₂导致晶体结构从斜方晶向单斜晶变化。斜方晶系Y ₂ W ₃ O ₁₂型晶体结构可以在0.0≤x≤0.25的范围内合成，而单斜晶Ce ₂ W可以在1.0 <x≤2.0的范围内合成单相Y _{2- x} Ce _x W ₃ O ₁₂陶瓷。_分别为3 O ₁₂型晶体结构。随着铈的取代量的增加，Y _{2- x} Ce _x W ₃ O ₁₂的吸湿现象显着促进，同时热膨胀系数逐渐降低。通过改变铈的取代量，可以将Y _{2- x} Ce _x W ₃ O ₁₂陶瓷的线性热膨胀系数从-13.094×10 ^-6  K ^-1调整为2.327×10 ^-6  K ^-1。此外，Y _0.25 Ce _1.75 W ₃ O ₁₂不会吸收空气中的水分，并且从182°C到700°C几乎显示零热膨胀，其热膨胀系数经测试为-0.820×10 ^-6  K ^-1。这种低热膨胀Y _0.25 Ce _1.75 W ₃ O ₁₂材料在许多领域的精密设备制造中可能具有巨大的潜在应用。