【摘 要】
：
(ZrMg)xY2-2xMo3O12 (x=0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1) ceramics have been synthesized to obtain less hygroscopicity and negative thermal expansion. With increasing the substitution of (ZrMg)6+ (ion radius 7.2 ×10-11 m) for Y3+ (ion
【机 构】
：
Physics Experiment Center, Zhengzhou University of Aeronautics, Zhengzhou 450046, China;School of Ph
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
(ZrMg)xY2-2xMo3O12 (x=0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1) ceramics have been synthesized to obtain less hygroscopicity and negative thermal expansion. With increasing the substitution of (ZrMg)6+ (ion radius 7.2 ×10-11 m) for Y3+ (ion radius 9×10-11 m), the crystal water are reduced obviously. The linear thermal expansion coefficient is improved with increasing the content of (ZrMg)6+. The material shows near zero thermal expansion (-0.12×10-6 K-1, 430-870 K) with x=0.7. Meanwhile, ZrMgMo3O12 shows low non-hygroscopicity and negative thermal expansion, but low softening temperature. After substituting amount of Y3+ for (ZrMg)6+ in ZrMgMo3O12 (x=0.8), the softening temperature increases remarkably (750 K to 830 K) and it presents near zero thermal expansion.
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