Platinum electrode of oxygen sensor and preparation method thereof
A technology of oxygen sensor and platinum electrode, which is applied in the field of oxygen sensor platinum electrode and its preparation, can solve problems such as unsatisfactory thermal shock resistance, achieve remarkable environmental protection, satisfy air permeability, and prevent poisoning
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Embodiment 1
[0032] This example is used to illustrate the preparation of the platinum electrode of the automobile oxygen sensor provided by the present invention.
[0033] (1) Take a certain amount of Al(OH) with a particle diameter of about 1 micron 3 The solid powder is poured into an alumina burning boat and pre-fired at 250°C for 72 hours; the obtained powder is mixed with MgO powder with a particle diameter of about 1 micron in a molar ratio of 1:1 and ball milled for 10 hours, and then heated at 1350 ℃ roasting for 3 hours; after cooling, magnesium aluminum spinel powder is obtained. The prepared magnesia-aluminum spinel is pulverized, classified and screened to keep the powder of about 1 micron.
[0034] (2) 45 parts by weight of Y-ZrO 2 Micropowder (ZrO 2 and Y 2 o 3 The molar ratio is 95:5, and the particle diameter is about 2-3 microns), 41 parts by weight of the above-mentioned magnesium aluminum spinel (MgAl 2 o 4 ) powder, 3 parts by weight Al 2 o 3 Powder, 3 parts b...
Embodiment 2
[0037] This embodiment is used to illustrate the preparation of the platinum electrode of the automobile oxygen sensor provided by the present invention
[0038] (1) Take a certain amount of Al(OH) with a particle diameter of about 1 micron 3 The solid powder is poured into an alumina burning boat and pre-fired at 260°C for 48 hours; the obtained powder and MgO powder with a particle diameter of 1 micron are mixed and ball milled at a molar ratio of 1:1 for 10 hours, and then heated at 1300 ℃ roasting for 2 hours; after cooling, magnesium aluminum spinel powder is obtained. The prepared magnesia-aluminum spinel is pulverized, classified and screened to keep the powder of about 1 micron.
[0039] (2) 50 parts by weight of Y-ZrO 2 Micropowder (ZrO 2 and Y 2 o 3 The molar ratio is 97:3, and the particle diameter is about 2-3 microns), 38 parts by weight of the above-mentioned magnesium aluminum spinel (MgAl 2 o 4 ) powder, 2 parts by weight of Al 2 o 3 Powder, 3 parts by...
Embodiment 3
[0042] This embodiment is used to illustrate the preparation of the platinum electrode of the automobile oxygen sensor provided by the present invention
[0043] (1) Take a certain amount of Al(OH) with a particle diameter of about 1 micron 3 The solid powder is poured into an alumina crucible and pre-fired at 280°C for 48 hours; the obtained powder and MgO powder with a particle diameter of about 1 micron are mixed and ball milled at a molar ratio of 1:1 for 10 hours, and then heated at 1360°C Roasting for 2 hours; after cooling, magnesium aluminum spinel powder is obtained. The prepared magnesia-aluminum spinel is pulverized, classified and screened to keep the powder of about 1 micron.
[0044] (2) 55 parts by weight of Y-ZrO 2 Micropowder (ZrO 2 and Y 2 o 3 The molar ratio is 92:8, the particle diameter is about 2-3 microns), 33 parts by weight of MgAl 2 o 4 Powder, 2 parts by weight Al 2 o 3 Powder, 3 parts by weight SiO 2 powder, 1 weight part K 2 CO 3, 3 par...
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Abstract
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