Preparation method for high-toughness nanometer black porcelain material
A high-toughness, nano-technology, applied in the field of preparation of high-toughness nano-black ceramic materials, can solve the problems of low toughness of thermal substrates, limited widespread promotion, poor thermal conductivity, etc., and achieves strong thermal shock resistance, simple process, and lower sintering temperature Effect
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Embodiment 1
[0015] A preparation method of high-toughness nano black porcelain material, the steps are as follows:
[0016] 1) Put 3.5g of zirconia, 0.5g of alumina and 1g of titania whisker granular solid raw materials in a ball mill jar, add 50mL of absolute ethanol and use Al2O3 ball wet ball milling for 24 hours, dry the obtained powder The mixture is mixed with polyvinyl alcohol (PVA) solution at a volume ratio of 1:1, dried, ground into powder, and evenly dispersed into nano-ceramic materials. At the same time, 2.5g of yttrium oxide and 2.5g of lanthanum phosphate are added and mixed evenly, dried Afterwards, thermosetting molding is carried out at a vacuum degree of 100 Pa and 1000 ° C, and the obtained nano black porcelain material is ground into powder for later use;
[0017] 2) Put 8g of SiC and 2g of BN granular raw materials into a container, add 100mL of absolute ethanol and mix them with Al2O3 balls for 24 hours, dry them in vacuum for 12 hours, and mix the obtained powdery ...
Embodiment 2
[0020] A preparation method of high-toughness nano black porcelain material, the steps are as follows:
[0021] 1) Put 5.5g of zirconia, 1.5g of alumina and 3g of titania whisker granular solid raw materials into a ball mill jar, add 100mL of absolute ethanol and use Al2O3 ball wet ball milling for 24 hours, dry the obtained powder Mix the mixture with polyvinyl alcohol (PVA) solution at a volume ratio of 1:1, then dry it in a vacuum oven for 12 hours, grind it into a powder, and evenly disperse it in the nano-ceramic material, and add 5g of yttrium oxide and 5g of lanthanum phosphate at the same time And mix evenly, after drying, thermoset molding under the conditions of vacuum degree of 100Pa and 800°C, and grind the obtained nano black porcelain material into powder for later use;
[0022] 2) Put 8g of SiC and 2g of BN granular raw materials into a container, add 100mL of absolute ethanol and mix them with Al2O3 balls for 24 hours, dry them with nitrogen for 12 hours, and m...
Embodiment 3
[0025] A method for preparing a high-toughness nano black porcelain material, the steps of which are basically the same as in Example 2, except that the thermosetting conditions in step 1) are vacuum degree of 100 Pa and temperature of 1000 °C.
[0026] Observing the obtained high-toughness nano black porcelain material through an electron microscope, due to the increase in temperature, the cross-section of the ceramic fragments under the electron microscope is compared with Example 2, and the small holes are much less.
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