Flow-casting production equipment for zirconium oxide substrates

Abstract

The invention discloses flow-casting production equipment for zirconium oxide substrates. The flow-casting production equipment is characterized in that a flow-casting bearing plate made of a stainless steel plate material is laid on the surface of a working platform, a film band paid off by a pay-off mechanism is taken up by a take-up mechanism after passing through the surface of the working platfrom, a flow-casting device is arranged at the end, close to the pay-off mechanism, of the working platform, a plurality of drying chambers are arranged on the working platform, the multiple drying chambers communicate with one another, a closed drying space is formed on the working platform, a first exhaust pipe is arranged at the front end in the closed drying space, a second exhaust pipe is arranged in the middle position in the closed drying space, glass baffles are arranged in the drying chambers and shield the film band passing through the drying chambers, the glass baffles are horizontally arranged in an inclined mode in the transverse direction, and a resistance wire heater with a thermocouple is installed at the bottom of the flow-casting bearing plate. According to the flow-casting production equipment, efficient high-quality production of the zirconium oxide substrates can be achieved, and the produced zirconium oxide substrates are free of cracking, flat in surface and even in thickness.

Description

technical field [0001] The invention relates to the technical field of zirconia sensors, in particular to zirconia substrate casting production equipment for making zirconia sensor chips. Background technique [0002] Zirconia sensor is used to measure the amount of residual oxygen in the combustion process of automobiles, which plays an active role in reducing environmental pollution and improving combustion efficiency. The key component of the zirconia sensor is the zirconia chip, and the latest zirconia chip adopts the lamination process of multi-layer zirconia substrates. In the prior art, zirconia substrates are produced by tape casting. In the casting stage of tape casting production, a flat scraper with a single blade is usually used to scrape the surface of the slurry to form a billet. It is difficult to control the viscosity and rheological properties, so the surface of the green sheet is prone to surface streaks during the casting stage; in addition, when the stoc...

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Problems solved by technology

In the prior art, zirconia substrates are produced by tape casting. In the casting stage of tape casting production, a flat scraper with a single blade is usually used to scrape the surface of the slurry to form a billet. It is difficult to control the viscosity and rheological properties, so the surface of the green sheet is prone to surface streaks during the casting stage; in addition, when the stock tank is continuously fed through multiple feeding pipes, the slurry will also cause Because the slurry cannot be kept uniform during the moving process and tends to be short-range ordered, resulting in streaks on the surface of the green sheet; also, in the drying stage of tape casting production, the drying process of the green sheet in the drying chamber usually adopts the method of blowing hot air , the way of blowing hot air will form a large air turbulence in the drying room. Since the slurry contains a large amount of additives and solvents, during the drying process of the green sheet, the drying behavior of the green sheet of each slurry has a very large difference, and during the drying process of the green sheet, the solvent in the green sheet evaporates from one side of the upper surface of the green sheet, and because the thickness of the green sheet is thin (generally 0.1-0.2mm), the green sheet is very easy to dry during the drying stage. The phenomenon of bending and cracking seriously restricts the efficient and high-quality production of zirconia substrates, which not only affects the production quality of zirconia chips, but also affects the measurement accuracy and working stability of zirconia sensors.

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