Silicon nitride ceramic slurry, preparation method of silicon nitride ceramic slurry and application of silicon nitride ceramic slurry in preparing silicon nitride cast film
A technology of silicon nitride ceramics and silicon nitride, which is applied in the preparation of ceramic slurry and the field of preparation of silicon nitride ceramic slurry, can solve problems such as difficult preparation, achieve low sintering shrinkage, high density, and a wide range of applications Effect
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Embodiment 1
[0028] In this embodiment, a method for preparing a silicon nitride cast film by non-water-based tape casting comprises the following steps:
[0029] (1) Weigh 27.2g of absolute ethanol and 52.8g of dibutyl ketone as the solvent respectively, and weigh 5.022g of pvp as the dispersant, add the dispersant and the solvent into the ball mill jar, and ball mill for 2h at a speed of 220r / min to make Dissolve the dispersant in the solvent to obtain a ball-milled dispersant solution. After the dispersant is dissolved, weigh 162g of silicon nitride powder, and weigh 8.1g of Y 2 o 3 and 8.1g of MgO powder as a sintering aid, open the ball milling tank, add silicon nitride powder and sintering aid to the dispersion in the ball milling tank, then seal the ball milling tank, continue ball milling for 24 hours, and control the speed at 220r / min, to obtain a stable suspension;
[0030] (2) take by weighing the BBP of 8.1g and the PEG of 8.1g as plasticizer respectively, and take by weighi...
Embodiment 2
[0034] This embodiment is basically the same as Embodiment 1, especially in that:
[0035] In this embodiment, a method for preparing a silicon nitride cast film by non-water-based tape casting comprises the following steps:
[0036] (1) Weigh 34.0g of absolute ethanol and 66.0g of dibutyl ketone as solvent, weigh 5.184g of pvp as dispersant, add the dispersant and solvent into the ball mill tank, and ball mill for 2h at a speed of 250r / min, Dissolve the dispersant in the solvent to obtain a ball-milled dispersant solution. After the dispersant is dissolved, weigh 162g of silicon nitride powder, and weigh 8.1g of Y 2 o 3 and 8.1g of MgO powder as a sintering aid, open the ball milling tank, add silicon nitride powder and sintering aid to the dispersion in the ball milling tank, then seal the ball milling tank, continue ball milling for 24 hours, and control the speed at 250r / min, to obtain a stable suspension;
[0037] (2) take by weighing the BBP of 13.6g and the PEG of 1...
Embodiment 3
[0041] This embodiment is basically the same as the previous embodiment, and the special features are:
[0042] In this embodiment, a method for preparing a silicon nitride cast film by non-water-based tape casting comprises the following steps:
[0043] (1) Weigh 51.0 g of absolute ethanol and 99.0 g of dibutyl ketone as solvent, weigh 7.168 g of pvp as dispersant, add dispersant and solvent into the ball mill tank, and ball mill for 2 hours at a speed of 200 r / min, Dissolve the dispersant in the solvent to obtain a ball-milled dispersant solution. After the dispersant is dissolved, weigh 224g of silicon nitride powder, and weigh 10.08g of Y 2 o 3 and 10.08g of MgO powder as a sintering aid, open the ball milling jar, add silicon nitride powder and sintering aid to the dispersion in the ball milling jar, then seal the ball milling jar, continue ball milling for 24 hours, and control the speed of 250r / min, get a stable suspension;
[0044] (2) take by weighing the BBP of 20...
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