An alkali-resistant heatproof glass material and a preparation method thereof
A technology of glass materials and glass raw materials, which is applied in the field of glass materials with good alkali resistance and thermal stability and its preparation, can solve the problems of poor alkali resistance, high thermal expansion coefficient, and thermal instability, and achieve good alkali resistance Performance, Effect of Low Thermal Expansion Coefficient
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Embodiment 1
[0012] An alkali-resistant and heat-resistant glass material, the preparation method includes the following steps: (1) The weight ratio of the glass components is: TeO 2 7kg, K 2 O is 4kg, SiO 2 13kg, PbO 4kg, Y 2 o 3 Mix the raw materials corresponding to the above oxides; (2) Grind the mixed glass raw materials with an ultrafine pulverizer, and screen the passing powder with a 400-mesh sieve after pulverization; (3) Open the corundum crucible, Add the powder that passed through the 400-mesh sieve into the corundum crucible, heat the corundum crucible to 1340°C at a heating rate of 30°C / min, keep the temperature at the highest temperature for 3 hours, and stir the glass liquid at the same time ;(4) Clarify by ventilating after stirring; (5) pour the glass liquid into the mold after clarification; (6) anneal the glass after pouring, the first stage is annealing from the highest temperature to 1000°C for 1.5h, Then lower the temperature to 450°C and keep it for 3 hours, and...
Embodiment 2
[0014] An alkali-resistant and heat-resistant glass material. The preparation method includes the following steps: (1) The weight ratio of the glass components is: TeO 2 5kg, K 2 O is 7kg, SiO 2 13kg, PbO 9kg, Y 2 o 3 Mix the raw materials corresponding to the above oxides; (2) Grind the mixed glass raw materials with a superfine pulverizer, and screen the passing powder with a 400-mesh sieve after pulverization; (3) Open the corundum crucible, Add the powder that passed through the 400-mesh sieve into the corundum crucible, heat the corundum crucible to 1400°C at a heating rate of 30°C / min, keep the temperature at the highest temperature for 3 hours, and stir the glass liquid at the same time ;(4) Clarify by ventilation after stirring; (5) pour the glass liquid into the mold after clarification; (6) anneal the glass after pouring, the first stage is annealing from the highest temperature to 950°C for 1.5h, Then lower the temperature to 450°C and keep it for 3 hours, and f...
Embodiment 3
[0016] An alkali-resistant and heat-resistant glass material. The preparation method includes the following steps: (1) The weight ratio of the glass components is: TeO 2 6kg, K 2 O is 9kg, SiO 2 12kg, PbO 7kg, Y 2 o 3 Mix the raw materials corresponding to the above oxides; (2) Grind the mixed glass raw materials with a superfine pulverizer, and screen the passing powder with a 400-mesh sieve after pulverization; (3) Open the corundum crucible, Add the powder that passed through the 400-mesh sieve into the corundum crucible, heat the corundum crucible to 1370°C at a heating rate of 30°C / min, keep the temperature at the highest temperature for 3 hours, and stir the glass liquid at the same time ;(4) Clarify by ventilation after stirring; (5) pour the glass liquid into the mold after clarification; (6) anneal the glass after pouring, the first stage is annealing from the highest temperature to 970°C for 1.5h, Then lower the temperature to 450°C and keep it for 3 hours, and f...
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