Yttrium-stabilized zirconia slurry, preparation method thereof and preparation method of yttrium-stabilized zirconia green body

Abstract

The invention relates to yttrium-stabilized zirconia slurry, a preparation method thereof and a preparation method of a yttrium-stabilized zirconia green body. The yttrium-stabilized zirconia slurry comprises the following components in percentage by weight: 70-90% of yttrium-stabilized zirconia powder, 6.5-25% of a solvent, 0.5-5% of a surfactant, 0.5-1.5% of a defoaming agent, 2-8% of adhesive and 0.5-2.5% of a plasticizer, wherein the solvent comprises water and an inorganic solvent, the organic solvent is at least one of tertiary butyl carbitol acetate, n-propyl acetate, olive oil, glycerol, ethanol, hexanediol, isobutanol and terpilenol, percentage content of water in the solvent is 70-95%; and the surfactant is at least one of oleic acid, castor oil, methylacrylate, triethanolamine, glycerol trioleate, menhaden fish oil and acrylate copolymer ammonium salt. The yttrium-stabilized zirconia slurry is more environmentally friendly, and a moulding technology is relatively simple.

Description

technical field [0001] The invention relates to a yttrium-stabilized zirconia slurry, a preparation method thereof and a preparation method of a yttrium-stabilized zirconia green body. Background technique [0002] The production technology of the automotive oxygen sensor chip is the core technology of the automotive oxygen sensor. The quality of the chip directly affects the quality of the oxygen sensor, which requires the preparation of a good ceramic substrate. At present, the commonly used preparation process for ceramic substrates is to make yttrium-stabilized zirconia slurry into large-area, thin, flat ceramic sheets by tape casting, and then cut them. [0003] The tape casting method is the main solution that has been industrialized at present. The disadvantages of the traditional yttrium-stabilized zirconia slurry tape casting process are that the organic solvents (such as toluene, xylene, etc.) used are toxic, the production cost is high, and the slurry The high co...

AI Technical Summary

Problems solved by technology

[0003] The tape casting method is the main solution that has been industrialized at present. The disadvantages of the traditional yttrium-stabilized zirconia slurry tape casting process are that the organic solvents (such as toluene, xylene, etc.) used are toxic, the production cost is high, and the slurry The high content of organic matter in the medium leads to low density of green embryos, etc.

Due to the low solid content of the yttrium-stabilized zirconia slurry, the thickness of the tape-cast film is relatively thin, and multiple films need to be laminated and compounded during use, which increases the complexity of the forming process.

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