Ultra-low-expansion ceramic pot and manufacturing method thereof

Abstract

The invention discloses an ultra-low-expansion ceramic pot. The ultra-low-expansion ceramic pot comprises a ceramic pot blank and a glaze coated on the surface of the ultra-low-expansion ceramic pot. The ceramic pot blank comprises main materials and one or more nucleation agents. The main materials comprise: by weight, 10 to 50% of petalite, 10 to 50% of spodumene, 25 to 40% of kaolin, 2 to 15% of quartz and 2 to 5% of calcined talcum. Preferably, the main materials comprise: by weight, 40 to 50% of petalite, 10 to 20% of spodumene, 30 to 35% of kaolin, 2 to 6% of quartz and 2 to 5% of calcined talcum. The weight of the one or more nucleation agents is 0.2 to 0.8% of that of the main materials. The invention also discloses a manufacturing method of the ultra-low-expansion ceramic pot. The ultra-low-expansion ceramic pot has excellent quick-cooling and quick-heating resistance and ultra-low thermal expansion coefficients. The manufacturing method provided by the invention obviously improves product use performances and stability, has simple processes and good repeatability, is suitable for industrial production and is conducive to promotion of ceramic cooker application and development.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a ceramic pot for cooking. Background technique [0002] Pots are the most commonly used cooking utensils in cooking, and the use of frying pans is more general. Because the frying pan is used under high temperature and rapid cooling and rapid heating, the material of the frying pan is generally all iron so far. However, the iron frying pan has poor heat preservation performance, and the cooking taste is not delicious; and it is easy to rust, and long-term use will cause harm to the human liver. For this reason, the prior art also has some organic coatings sprayed on the surface of the pot to prevent rust, but the use effect is not good, and it will inevitably cause secondary pollution. [0003] For addressing the above problem, prior art has also developed the wok of ceramic material. Ceramic pots have good heat preservation performance, delicious cooking, and are environmen...

AI Technical Summary

Problems solved by technology

In order to adapt to the cooking environment and requirements of the wok, the wok made of ceramic material in the prior art is usually made of ordinary low-expansion ceramic material, which can withstand heat exchange at 650°C to 20°C without cracking, but its coefficient of thermal expansion is relatively large ( α=2.6×10 -6 / °C), the carcass has a high water absorption rate, low strength, easy to burst, and short service life, so it is difficult to promote and apply