A thick film resistance paste for alumina ceramic pressure sensor
A pressure sensor, alumina ceramic technology, applied in the field of sensors, can solve the problems of large interference of the output signal of the sensor, reduced accuracy of measurement results, low sensor sensitivity, etc., to achieve the effects of increased sensitivity, improved accuracy, and improved strain coefficient
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Embodiment 1
[0027] A kind of thick-film resistance paste for alumina ceramic pressure sensor, comprises the following components by weight:
[0028] 45 parts of molybdenum oxide, 8 parts of glass powder, 25 parts of modified phenolic resin binder, 15 parts of organic vehicle; the particle size of the glass powder is 2.5 μm; the mass ratio of lead oxide and silicon dioxide in the glass powder It is 3:6.
[0029] The organic vehicle includes the following components in parts by weight:
[0030] 18 parts of ethyl cellulose, 4 parts of furoic acid, 7 parts of polyacrylate, 60 parts of butyl carbitol acetate.
[0031]The preparation method of modified phenolic resin binder comprises the following steps:
[0032] Add phenol and o-hydroxyphenol to the reactor after preheating and melting, the molar ratio of o-hydroxyphenol and phenol is 1:8, add catalyst sodium hydroxide to the reactor, the amount of sodium hydroxide added is 3.5wt% of phenol , heat up to 83°C, add formaldehyde, the molar rat...
Embodiment 2
[0036] A kind of thick-film resistance paste for alumina ceramic pressure sensor, comprises the following components by weight:
[0037] 48 parts of molybdenum oxide, 9 parts of glass powder, 28 parts of modified phenolic resin binder, 17 parts of organic vehicle; The particle size of described glass powder is 3 μm; The mass ratio of plumbous oxide and silicon dioxide in described glass powder is 3:7.
[0038] The organic vehicle includes the following components in parts by weight:
[0039] 19 parts of ethyl cellulose, 4 parts of furoic acid, 8 parts of polyacrylate, 65 parts of butyl carbitol acetate.
[0040] The preparation method of modified phenolic resin binder comprises the following steps:
[0041] Add phenol and o-hydroxyphenol to the reactor after preheating and melting, the molar ratio of o-hydroxyphenol and phenol is 1:9, add catalyst sodium hydroxide to the reactor, the amount of sodium hydroxide added is 4.5wt% of phenol , heat up to 85°C, add formaldehyde, t...
Embodiment 3
[0045] A kind of thick-film resistance paste for alumina ceramic pressure sensor, comprises the following components by weight:
[0046] 42 parts of molybdenum oxide, 6 parts of glass powder, 22 parts of modified phenolic resin binder, 13 parts of organic vehicle; The particle size of the glass powder is 2 μm; The mass ratio of lead oxide and silicon dioxide in the glass powder is 1:2.
[0047] The organic vehicle includes the following components in parts by weight:
[0048] 16 parts of ethyl cellulose, 3 parts of furoic acid, 6 parts of polyacrylate, 55 parts of butyl carbitol acetate.
[0049] The preparation method of modified phenolic resin binder comprises the following steps:
[0050] Add phenol and o-hydroxyphenol to the reactor after preheating and melting, the molar ratio of o-hydroxyphenol and phenol is 1:6, add catalyst sodium hydroxide to the reactor, the amount of sodium hydroxide added is 2.5wt% of phenol , heat up to 80°C, add formaldehyde, the molar ratio o...
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