Method for preparing oxide ceramic through furnace-free rapid sintering at room temperature

A technology of rapid sintering of oxide ceramics, which is applied in the field of rapid sintering of oxide ceramics at room temperature, can solve the problems of low energy utilization, long sintering time, and large hardware investment, and achieve high energy utilization and short sintering time. Short and low hardware investment

Active Publication Date: 2019-12-24
陕西智航昱铠新材料有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing oxide ceramics by furnace-free rapid sintering at room temperature, without the need for a high-temperature heating furnace, and directly and rapidly sinters various metal oxide ceramics or oxide ceramics by using current thermal effect at room temperature. The method of solid solution ceramics or composite oxide ceramics or complex oxide ceramics or oxide ceramic matrix or multi-phase oxide ceramics solves the problem of large hardware investment, high-temperature furnace equipment and sintering time in the preparation of various oxide ceramic materials. long, high energy consumption, low energy utilization, and high cost, this technology has the characteristics of small hardware investment, simple process, energy saving and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Rapid preparation of MgO ceramic material without furnace at 20°C

[0038] Step 1 Weighing of MgO ultrafine powder: take 25.0 grams of MgO ultrafine powder with a particle size between 5nm and 500nm.

[0039] Step 2 Preparation of saturated sodium chloride solution: Weigh 1.79 grams of analytically pure sodium chloride, add the said sodium chloride to 5.0 mL of distilled water at 20°C, stir evenly with a magnetic stirrer until the solution is clear, and prepare into a saturated solution of sodium chloride at 20°C.

[0040] Step 3 Preparation of MgO ultrafine powder precursor and wet green body molding: inject all the saturated sodium chloride solution prepared in step 2 into the MgO powder raw material, add 15.0 mL of distilled water, stir the MgO powder until uniform, and place it for aging After drying for 24 hours, the MgO was dried to a water content of 20% at 40°C to obtain a MgO powder precursor; then the prepared MgO precursor was put into a mold, and...

Embodiment 2

[0042] Example 2: Rapid preparation of MgO ceramic material without furnace at 20°C

[0043] Step 1 Weighing of MgO ultrafine powder: take 30.00 grams of MgO ultrafine powder with a particle size between 700nm and 1000nm.

[0044] Step 2 Preparation of saturated sodium sulfate solution: Weigh 0.93 g of analytically pure sodium sulfate powder, add sodium sulfate to 5.0 mL of distilled water at 20 °C, stir evenly with a magnetic stirrer until the solution is clear, and prepare 20 °C A saturated solution of sodium sulfate.

[0045] Step 3 Preparation of MgO ultrafine powder precursor and wet green body molding: inject all the saturated sodium sulfate solution prepared in step 2 into MgO, add 15.0 mL of distilled water, stir the MgO powder until uniform, and place it for aging for 0.5 hours. Then dry the MgO to a water content of 15% at 42°C to obtain a MgO powder precursor; then put the prepared MgO precursor into a mold and apply a pressure of 30MPa to form the precursor into a...

Embodiment 3

[0047] Example 3: Furnaceless rapid preparation of BaO ceramic material at 35°C

[0048] Step 1 Weighing of BaO ultrafine powder: Take 35.00 grams of BaO ultrafine powder with a particle size between 20nm and 300nm.

[0049] Step 2 Prepare potassium chloride saturated solution, aluminum sulfate saturated solution and iron nitrate saturated solution respectively: Weigh 0.39 grams of analytically pure grade potassium chloride powder, 0.43 analytically pure grade aluminum sulfate powder and 1.66 grams of analytically pure grade ferric nitrate Powder, at 35°C, add the above-mentioned potassium chloride to 1.0mL distilled water to make a saturated solution of potassium chloride; dissolve the said aluminum sulfate in 1.0mL distilled water, and add 1.0mol / L hydrochloric acid to adjust the pH to pH = 3 to make the aluminum sulfate solution clear, stir evenly with a magnetic stirrer to make a saturated solution of aluminum sulfate at 35°C; dissolve the so-called ferric nitrate in 1.0 m...

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Abstract

The invention relates to a method for preparing oxide ceramic through furnace-free rapid sintering at room temperature, particularly a method for preparing metal oxide ceramic or oxide solid solutionceramic or composite oxide ceramic or complex oxide ceramic or oxide ceramic matrix or complex-phase oxide ceramic directly and rapidly through rapid sintering at room temperature through the currentheat effect without the need of a high-temperature heating furnace. Compared with an existing ceramic sintering technology, the method has the advantages that densified sintering of various oxide ceramic materials can be achieved without high-temperature furnace equipment or sample heating in advance, the sintering time is short, the efficiency is high, the hardware investment is small, the energyutilization rate is high, the application range is wide, the process is simple, the energy-saving effect is good, and the cost is low. The method is suitable for rapidly preparing oxide ceramic and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a method for rapidly sintering oxide ceramics without a furnace at normal temperature, in particular to a method for directly and rapidly sintering various metal oxide ceramics or oxide solid solution ceramics without a heating furnace and using current thermal effect at normal temperature Or the preparation method of composite oxide ceramics or complex oxide ceramics or oxide ceramic matrix or composite oxide ceramics. Background technique [0002] Oxide ceramic materials can be used as structural ceramics or functional ceramic materials, and generally have many excellent physical and chemical properties such as: high chemical stability, high melting point, high temperature resistance, oxidation resistance, corrosion resistance, wear resistance, high temperature strength, mechanical and mechanical properties Common characteristics such as excellent performance have a wide range ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/64
CPCC04B35/01C04B35/64C04B2235/3203C04B2235/3201C04B2235/3205C04B2235/3206C04B2235/3208C04B2235/3213C04B2235/3215C04B2235/3284C04B2235/3281C04B2235/3272C04B2235/3279C04B2235/3275C04B2235/3262C04B2235/3296C04B2235/3217C04B2235/3409C04B2235/3239C04B2235/3241C04B2235/3286C04B2235/3224C04B2235/3244C04B2235/3232C04B2235/3418C04B2235/3229C04B2235/3251C04B2235/3267C04B2235/3293C04B2235/3258C04B2235/3263C04B2235/3277C04B2235/3225C04B2235/3227C04B2235/448C04B2235/444C04B2235/443C04B2235/442C04B2235/447C04B2235/449C04B2235/77C04B2235/666
Inventor 李焕勇张春辉黄欢欢王乾唐琦
Owner 陕西智航昱铠新材料有限责任公司
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