A kind of orthogonal phase gd(oh)co3 and its preparation method and application
A technology of orthorhombic phase and orthorhombic crystal system, applied in chemical instruments and methods, rare earth metal compounds, single crystal growth, etc., can solve the problems of unreported applications and failure to obtain single crystals, and achieve high stability, Effect of high magnetic entropy change
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Embodiment 1
[0048] Mix gadolinium chloride hexahydrate and malononitrile at a molar ratio of 1:1, add water to dissolve in the reaction kettle, and keep the temperature at 180°C for 72 hours, take it out and cool down naturally, filter, wash, and dry to obtain the positive Cross-phase Gd(OH)CO 3 , the yield is about 30%.
Embodiment 2
[0050] Mix gadolinium chloride hexahydrate and malononitrile in a molar ratio of 1:2, add water to dissolve in the reaction kettle, and keep the temperature at 180°C for 72 hours, take it out and cool down naturally, filter, wash, and dry to obtain the positive Cross-phase Gd(OH)CO 3 , the yield is about 40%.
Embodiment 3
[0052] Mix gadolinium chloride hexahydrate and malononitrile in a molar ratio of 1:3, add water to dissolve in the reaction kettle, and keep the temperature at 180°C for 72 hours, take it out and cool down naturally, filter, wash, and dry to obtain the positive Cross-phase Gd(OH)CO 3 , The yield is about 48%.
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