Chemical toughening agent, microcrystalline ceramic material and preparation method thereof and electronic device

A technology of microcrystalline ceramics and tempering agents, applied in the field of chemical tempering agents, microcrystalline ceramic materials and their preparation, can solve problems such as the inability to effectively improve the mechanical properties of microcrystalline ceramic materials, and achieve improved toughness and impact resistance, ion exchange high efficiency effect

Active Publication Date: 2022-07-08
WEIDALI IND CHIBI CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the tempering salt used in the existing glass tempering technology is generally based on NaNO 3 or KNO 3 The main salt is used in the temperature range of 350°C to 500°C. When tempering the matrix of the microcrystalline ceramic material at this temperature, the mechanical properties of the microcrystalline ceramic material cannot be effectively improved at all.

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  • Chemical toughening agent, microcrystalline ceramic material and preparation method thereof and electronic device

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[0051] Further, an embodiment of the present invention provides a method for preparing a microcrystalline ceramic material, including the following step S10.

[0052] Step S10, preheating the microcrystalline ceramic substrate, and then placing it in the chemical toughening agent as described above for tempering to obtain a microcrystalline ceramic material;

[0053] The conditions of tempering treatment are: tempering at 500℃~900℃ for 0.5h~28h.

[0054] In some of the embodiments, the conditions of the above-mentioned preheating step are: heating at 400° C.˜900° C. for 0.5˜5 h.

[0055] In some of these embodiments, the microcrystalline ceramic matrix described above contains an alkali metal oxide. Further, the mass of the alkali metal oxide accounts for 2% to 8% of the mass of the microcrystalline ceramic matrix.

[0056] The above-mentioned alkali metal oxides include, but are not limited to, lithium oxide, sodium oxide, and potassium oxide.

[0057] In some of these emb...

Embodiment 1

[0071] 1) Provide an untempered microcrystalline ceramic matrix, wherein the composition of the microcrystalline ceramic matrix includes lithium oxide, sodium oxide and potassium oxide, the mass percentage of lithium oxide is 5%, the mass percentage of sodium oxide is 1%, and the mass percentage of potassium oxide is 5%. The mass percentage is 1%.

[0072] 2) Preheating the untempered microcrystalline ceramic substrate at 500°C for 1 hour, immersing the preheated microcrystalline ceramic substrate in a chemical toughening agent for the first tempering treatment, tempering at 550 °C for 5 hours, and cooling to room temperature after tempering, The first microcrystalline ceramic was obtained. Wherein, the chemical toughening agent includes sodium nitrate, sodium carbonate, potassium sulfate and auxiliary additives, wherein, the auxiliary additives are diatomaceous earth, and the ratio of moles of sodium nitrate, sodium carbonate, potassium sulfate and auxiliary additives is 9:0....

Embodiment 2

[0076] 1) Provide an untempered microcrystalline ceramic matrix, wherein the composition of the microcrystalline ceramic matrix includes lithium oxide, sodium oxide and potassium oxide, the mass percentage of lithium oxide is 5%, the mass percentage of sodium oxide is 1%, and the mass percentage of potassium oxide is 5%. The mass percentage is 1%.

[0077] 2) Preheat the untempered microcrystalline ceramic substrate at 700°C for 1 hour, immerse the preheated microcrystalline ceramic substrate in a chemical toughening agent for the first tempering treatment, temper it at 750 °C for 5 hours, and cool it to room temperature after tempering. The first microcrystalline ceramic was obtained. The chemical toughening agent includes sodium nitrate, sodium carbonate, potassium sulfate and auxiliary additives, wherein the auxiliary additive is diatomaceous earth, and the molar ratio of sodium nitrate, sodium carbonate, potassium sulfate and auxiliary additives is 2:5:3:0.5 , the melting...

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Abstract

The invention relates to a chemical toughening agent, a microcrystalline ceramic material, a preparation method thereof and an electronic device. The chemical toughening agent includes molten salt A and molten salt B, and the ratio of the amount of molten salt A to molten salt B is (1 to 9): (1 to 8); molten salt A includes at least one of sodium nitrate and potassium nitrate. One, the molten salt B includes at least two of sodium carbonate, sodium sulfate, sodium chloride, potassium carbonate, potassium sulfate and potassium chloride. The present invention obtains a mixed molten salt with a higher melting point by mixing specific types of molten salt A and molten salt B in a specific proportion. The melting point of the chemical toughening agent is higher than 500° C. Strengthening can improve the toughness and impact resistance of the microcrystalline ceramic material. The protective shell used for preparing electronic products can improve the service life of electronic products.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a chemical toughening agent, a microcrystalline ceramic material, a preparation method and electronic equipment thereof. Background technique [0002] Microcrystalline ceramic material is a new type of composite material with high thermal conductivity and no expansion. It has a special complex phase structure composed of crystal phase and glass phase. Microcrystalline ceramic materials are generally prepared by mixing the glass phase with other additives, and then through a specific pressing and sintering process. Its structure is compact and uniform, with high mechanical strength, wear resistance and corrosion resistance, excellent electrical properties, adjustable expansion coefficient, thermal stability. Good performance and other excellent performance. Microcrystalline ceramic materials are widely used and can be used in many fields such as aerospace i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C21/00
CPCC03C21/002
Inventor 李倩倩陈亚兵许仁王伟
Owner WEIDALI IND CHIBI CO LTD
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