Ceramic liner for electric pressure cooking saucepan
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A technology of ceramic liner and electric pressure cooker, applied in the field of ceramic liner, can solve problems such as cost increase, and achieve the effect of overcoming the inability to withstand high pressure
Inactive Publication Date: 2012-10-03
宜兴市大成陶瓷有限公司
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Due to the addition of lithium raw materials, the cost is also inc
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Embodiment 1
[0022] Example 1: Nenhuangshi 15wt%; mullite 14wt%; cordierite 7wt%, talc 4wt%, red mud 22wt%, nail mud 30wt%, Suzhou soil 8wt%. Plus, soil bone 1wt%, 1wt% yellow dextrin. The material is crushed through a 100-mesh sieve, and the under-sieve is mixed to make wet mud, which is smelted, aged, shaped in a mold, trimmed, dried, and fired with an oxidizing flame at 1180-1200 ° C to obtain a pot of SiO 2 Content 54wt%, Al 2 o 3 The content is 36wt%, the compressive strength is 91MPa, no cracking after 80 exchanges at 200-20°C, and no cracking after one year of use.
Embodiment 2
[0023] Example 2: Nenhuangshi 24wt%; mullite 22wt%; cordierite 8wt%, talc 4wt%, red mud 20wt%, nail mud 18wt%, Suzhou soil 4wt%. Add 1wt% yellow dextrin. The preparation method is the same as Example 1, the pot SiO 2 Content 55wt%, Al 2 o 3 Content 32wt%, compressive strength 85MPa, 75 times at 200-20℃ without cracking.
Embodiment 3
[0024] Example 3: Nenhuangshi 25wt%; mullite 14wt%; cordierite 5wt%, talc 10wt%, white mud 14wt%, nail mud 26wt%, Suzhou soil 6wt%. Add 1wt% yellow dextrin. The preparation method is the same as Example 1, the pot SiO 2 Content≤52wt%, Al 2 o 3 The content is 34wt%, the compressive strength is 89MPa, and it will not crack after 75 times at 200-20°C.
[0025] In addition, for low-grade materials, 10-16wt% spundite and / or lithium feldspar can be added to adjust and improve thermal stability.
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Abstract
The invention relates to a ceramic liner for an electric pressure cooking saucepan, which is characterized by comprising the following components: 15 to 25 wt% of bright yellow stone, 12 to 20 wt% of mullite, 4 to 7 wt% of cordierite, 5 to 10 wt% of talc, 13 to 22 wt% of red mud and/or white mud, 15 to 30 wt% of argil, and 2 to 8 wt% of suzhou clay. The content of SiO2 of the cooking saucepan is less than or equal to 52 wt%, and the content of Al2O3 of the cooking saucepan ranges from 32 to 37 wt%. The invention not only retains the advantages of the liner of a ceramic pot but also overcomes the defects that the liner of the ceramic pot cannot bear high pressure, and the heat stability cannot meet the use requirement, can reach the test compression strength of 80 to 100 MPa, and is used stably for more than or equal to 1 year under the conventional cold-hot alternation.
Description
technical field [0001] The invention relates to a ceramic liner for an electric pressure cooker, in particular to a ceramic liner for an electric pressure cooker that has strong pressure resistance, good resistance to sudden cooling and rapid heat, and can be used for a long time without cracking. Background technique [0002] The ceramic liner for electric pressure cooker not only requires good stability of resistance to cold and heat changes, to ensure long-term normal and reliable use (for example, the number of cold and heat exchanges in conventional use ≥ 400 times, and stable use ≥ 1 year); it must also withstand 55- 65MPa or above working pressure to meet the requirements of electric pressure cooker. The biggest disadvantage of the pot liner made of ceramic material is that it has low thermal conductivity and is not resistant to rapid changes in cold and heat. During the alternation of cold and heat, it is prone to cracking, resulting in a short service life and losin...
Claims
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Application Information
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