Nitrogen oxide sensor-used platinum-rhodium electrode paste and preparation method thereof
An electrode slurry, nitrogen oxide technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve problems such as poor resolution of pure Pt electrodes
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[0024] A preparation method of platinum-rhodium electrode slurry for nitrogen oxide sensor, the steps are as follows:
[0025] (1) Production of glass binder: 40% SiO 2 , 20% Al 2 o 3 , 15% Bi 2 o 3 , 15% MgO, 2% CaO, 3% TiO 2 , 3% B 2 o 3 , 2% K 2 O, put it in a ball mill and mix it evenly, put it in a crucible, place it in a muffle furnace and heat it to 1500°C, keep it warm for 30 minutes, quench the molten glass in water and then pulverize it in a ball mill to obtain a particle size of <2 μm and a uniform composition Glass particles, stored for later use;
[0026] (2) Production of organic binder: weigh the organic solvent according to 90-95% of the total weight of the organic binder and place it in a beaker, first add additives to the solvent in accordance with the principle of increasing from less to more, and seal the beaker Place in a water bath and heat to 80°C, stir evenly until the additives are completely dissolved, then weigh the organic resin according t...
Embodiment 1
[0029] A platinum-rhodium electrode slurry (100g) for a nitrogen oxide sensor, the manufacturing process of which is as follows:
[0030] 1. Inorganic binder formula (prepared 100g): SiO 2 40g, AL 2 o 3 20g, Bi 2 o 3 15g; MgO15g; CaO2g; TiO 2 3g; B 2 o 3 3g;K 2 O2g;
[0031] 2. Production method of inorganic binder: Weigh the material according to the above weight, ball mill and mix it in a ball mill tank for 10 hours, take it out and place it in a crucible, heat it in a muffle furnace to 1300°C, keep it warm for 30 minutes, and quench it in high-purity water to obtain fine glass Particles, glass particles are crushed with a planetary ball mill for 4 hours, and the particle size is less than 10 μm;
[0032] 3. Ultra-fine platinum powder is micron powder, with an average particle size of 0.8μm and a bulk density of 1.1g / cm 3 , ultrafine platinum powder is spherical;
[0033] 4. The ultra-fine rhodium powder is a gradient powder: the particle size distribution of...
Embodiment 2
[0048] A platinum-rhodium electrode slurry (100g) for a nitrogen oxide sensor, the manufacturing process of which is as follows:
[0049] 1. Inorganic binder formula (prepared 100g): SiO 2 40g, AL 2 o 3 20g, Bi 2 o 3 15g; MgO15g; CaO2g; TiO 2 3g; B 2 o 3 3g;K 2 O2g;
[0050] 2. Production method of inorganic binder: Weigh the material according to the above weight, ball mill and mix it in a ball mill tank for 10 hours, take it out and place it in a crucible, heat it in a muffle furnace to 1300°C, keep it warm for 30 minutes, and quench it in high-purity water to obtain fine glass Particles, glass particles are crushed with a planetary ball mill for 4 hours, and the particle size is less than 10 μm;
[0051] 3. Ultra-fine platinum powder is micron powder, with an average particle size of 1μm and a bulk density of 1.1g / cm 3 , ultrafine platinum powder is spherical;
[0052] 4. The ultra-fine rhodium powder is a gradient powder: the particle size distribution of t...
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