Mechanical properties of solid-state-synthesized strontium- and magnesium-doped lanthanum gallate

被引:38
作者
Sammes, NM [1 ]
Keppeler, FM [1 ]
Näfe, H [1 ]
Aldinger, F [1 ]
机构
[1] Max Planck Inst Met Forsch, Pulvermet Lab, D-70569 Stuttgart, Germany
关键词
D O I
10.1111/j.1151-2916.1998.tb02744.x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This paper has examined the room-temperature mechanical properties of La0.8Sr0.2Ga1-xMgxO3-delta (x = 0.1-0.2) that was synthesized by using a solid-state technique. The modulus of rupture (MOR) was measured over the range of x = 0.1-0.2 and decreased as the B-site dopant content increased. At x = 0.15, for example, the MOR Was 139 +/- 17 MPa, whereas at x = 0.2, an MOR value of 113 +/- 8 MPa was observed. This decrease is postulated as being caused by the increased lattice stress due to the increased magnesium concentration on the B-site, The fracture toughness of the sample decreased as the magnesium content increased; at x = 0.15, a fracture toughness of 1.63 +/- 0.2 MPa . m(1/2) was observed, whereas at x = 0.2, a value of 1.28 MPa . m(1/2) was obtained.
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收藏
页码:3104 / 3108
页数:5
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