A method for preparing negative expansion material zirconium tungstate by solid phase reaction sintering method
A negative expansion material, solid-phase reaction technology, applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problems of cumbersome, low efficiency, etc., and achieve the effect of simple principle, high yield, and improved yield
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specific Embodiment approach 1
[0027] Specific implementation mode 1: The method for preparing the negative expansion material zirconium tungstate by the solid phase reaction sintering method of this implementation mode is carried out according to the following steps:
[0028] 1. Ingredients: Mix zirconia powder and tungsten oxide powder at a mass ratio of 1:3.5-4 to obtain a mixed material, and then mix the mixed material, zirconia balls and distilled water at a mass ratio of 1:2-5 : Add the ratio of 0.5 to 2 into the ball mill jar;
[0029] 2. Ball milling: place the ball milling tank in step 1 in a fast ball mill or a planetary ball mill, ball mill until the average particle size of the mixture is less than 1 μm, then add polyvinyl alcohol as a binder and ball mill for 5 minutes before taking out the slurry;
[0030] 3. Dry the slurry: pass the slurry obtained in step 2 through a 40-mesh standard sieve, then place it in a blast drying oven at 85-100°C for 14-16 hours, and then crush it with a mortar and ...
specific Embodiment approach 2
[0034] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, zirconia powder and tungsten oxide powder are mixed according to the mass ratio of 1:3.76. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in Step 1, the mixed material, zirconia balls and distilled water are added to the ball mill tank at a mass ratio of 1:3-4:1-1.5. Others are the same as in the first embodiment.
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