CN101041588A - Material and method for preparing electric function ceramic by laser - Google Patents
Material and method for preparing electric function ceramic by laser Download PDFInfo
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- CN101041588A CN101041588A CN 200710200363 CN200710200363A CN101041588A CN 101041588 A CN101041588 A CN 101041588A CN 200710200363 CN200710200363 CN 200710200363 CN 200710200363 A CN200710200363 A CN 200710200363A CN 101041588 A CN101041588 A CN 101041588A
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Abstract
The invention discloses an electronic functional ceramic material of barium titanate and making method through laser, which comprises the following steps: blending BaCO3 and TiO2 with the same molar rate; adding adhesive; mixing evenly; sieving; weighing the composition; placing into mounting press to press the sample into pieces; drying the samples; removing water and adhesive; sintering through CO2 laser; obtaining the product. The invention saves energy effectively, which improves the strength of product.
Description
Technical field: the present invention relates to a kind of material and method of preparing electric function ceramic by laser, belong to the preparing technical field of electric function ceramic.
Background technology: at present, preparation BaTiO
3The used material of electric function ceramic is BaCO
3, BaO and TiO
2, its preparation method mainly contains solid sintering technology and liquid phase synthesizing method.But these two kinds of preparation methods exist shortcoming separately: solid sintering technology is had relatively high expectations to starting material, product is difficult to reach molecular level and mixes, and the material activity is low, and energy expenditure is big, introduce impurity easily, its purity, homogeneity are relatively poor, and sintering time is long, and reaction is difficult to control, the ceramic components yield rate that obtains is low, withstand voltage properties is poor, and ceramic crystalline grain is bigger, and defectives such as pore are arranged; Its expensive raw material price of lqiuid phase sintering method, and preparation SrCO
3Gel needs just can be converted into SrCO after the high-temperature calcination
3Powder, grain growth and problems such as particle hard aggregation and cost height when having calcining.
Summary of the invention:
The objective of the invention is to: provide a kind of material and method of preparing electric function ceramic by laser, to overcome existing solid sintering technology and the existing shortcoming of liquid phase synthesizing method.
The present invention constitutes like this: a kind of material of preparing electric function ceramic by laser, be by etc. the barium carbonate (BaCO of mol ratio
3) and titanium dioxide (TiO
2) form.
Described BaCO
3And TiO
2Purity be 99%.
The method of preparing electric function ceramic by laser of the present invention is: with BaCO
3And TiO
2Mol ratio with 1: 1 is mixed, and adds binding agent behind the mixing, mixes, and uses 50 purpose sieve again, makes doughy mix become particle of uniform size; Take by weighing mixture then, every part 2 gram is put compressing tablet to the mounting press respectively, and pressure is 20MPa; The sample that presses is put into baking oven, slowly is heated to 80 ℃ (heating too fast easy generation cracking phenomena) earlier, heat preservation and dryness 1 hour, and to remove the moisture in the sample, reheat to 350 ℃ heat preservation and dryness 4 hours is to remove binding agent; Take out sample, use CO
2The laser direct sintering promptly makes barium titanate electric function ceramic.
CO
2In the laser sintered process, broad band laser output rating P=400W, sweep velocity is 150mm/min, facula area D=14 * 2mm
2, defocusing amount f=315mm.These processing condition are that the contriver is at fixed light spot size (14 * 2mm
2) and the prerequisite of defocusing amount (315mm) under, change broad band laser output rating and sweep velocity, by orthogonal experiment optimization, the optimal processing parameter that screens.The ceramic product performance that sintering goes out under these processing condition is best.
Wherein used binding agent is that concentration is 5% polyvinyl alcohol solution.
The polymerization degree of described polyvinyl alcohol is 1750.
The principles of chemistry of the present invention are: BaCO
3And TiO
2After mixing, compressing tablet, drying are removed moisture and binding agent, issue biochemical reaction: BaCO in the effect of broad band laser
3+ TiO
2→ BaTiO
3+ CO
2Because BaCO
3And TiO
2Molar ratio be 1: 1, can react the CO that reaction back generates cmpletely
2Gas evolution promptly gets the higher barium titanate electric function ceramic of purity.
The prepared electric function ceramic of the present invention has advantages such as reliability height, safety, economize on electricity, be mainly used in aspects such as temperature-sensing element, threshold currents element and constant temperature heating element, be specifically related to fields such as communication, household electrical appliances, aviation, automobile, power equipment.
Compared with prior art, material therefor low price of the present invention, laser sintered method power consumption is few, and sintering time is extremely lacked (about 1.5 seconds), the laser sintered BaTiO that makes
3Ceramic product crystal grain is very tiny, pore-free, and density is very high, makes product have certain intensity, and its performance (as electric conductivity, specific inductivity etc.) is reliable and stable.
Embodiment:
Embodiments of the invention 1: material therefor: BaCO
3(purity 99%), TiO
2(purity 99%)
With BaCO
3And TiO
2Mol ratio with 1: 1 is mixed, and adds concentration behind the mixing and is 5% polyvinyl alcohol solution and make binding agent, mixes, and uses 50 purpose sieve again, makes doughy mix become particle of uniform size; Take by weighing mixture then, every part 2 gram, put compressing tablet to the tabletting machine respectively, pressure is 20MPa, and the sample that presses is put into baking oven, slowly is heated to earlier 80 ℃ (heating too fast easy generation cracking phenomena), heat preservation and dryness 1 hour, to remove the moisture in the sample, reheat to 350 ℃ heat preservation and dryness 4 hours is to remove binding agent (polyvinyl alcohol); Take out sample, use CO
2The laser direct sintering: broad band laser output rating P=400W, sweep velocity is 150mm/min, facula area D=14 * 2mm
2, defocusing amount f=315mm; Promptly make barium titanate electric function ceramic.
Claims (6)
1. the material of a preparing electric function ceramic by laser is characterized in that: it by etc. the barium carbonate BaCO3 of mol ratio and titanium dioxide TiO2 form.
2. according to the material of the described preparing electric function ceramic by laser of claim 1, it is characterized in that: the purity of described BaCO3 and TiO2 is 99%.
3. the method for preparing electric function ceramic by laser as claimed in claim 1 or 2, it is characterized in that: BaCO3 and TiO2 are mixed with 1: 1 mol ratio, add binding agent behind the mixing, mix, use 50 purpose sieve again, make doughy mix become particle of uniform size; Take by weighing mixture then, every part 2 gram is put compressing tablet to the mounting press respectively, and pressure is 20MPa; The sample that presses is put into baking oven, is heated to 80 ℃ of heat preservation and drynesses earlier 1 hour, reheat to 350 ℃ heat preservation and dryness 4 hours; Take out sample,, promptly make barium titanate electric function ceramic with CO2 laser direct sintering.
4. according to the method for the described preparing electric function ceramic by laser of claim 3, it is characterized in that: in the laser sintered process of CO2, the broad band laser output rating is 400W, and sweep velocity is 150mm/min, and facula area is 14 * 2mm2, and defocusing amount is 315mm.
5. according to the method for the described preparing electric function ceramic by laser of claim 3, it is characterized in that: used binding agent is that concentration is 5% polyvinyl alcohol solution.
6. according to the method for the described preparing electric function ceramic by laser of claim 5, it is characterized in that: the polymerization degree of described polyvinyl alcohol is 1750.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710200363 CN101041588A (en) | 2007-03-29 | 2007-03-29 | Material and method for preparing electric function ceramic by laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710200363 CN101041588A (en) | 2007-03-29 | 2007-03-29 | Material and method for preparing electric function ceramic by laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101041588A true CN101041588A (en) | 2007-09-26 |
Family
ID=38807406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710200363 Pending CN101041588A (en) | 2007-03-29 | 2007-03-29 | Material and method for preparing electric function ceramic by laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101041588A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302100B (en) * | 2008-06-30 | 2011-06-22 | 贵州大学 | Material and method for preparing strontium titanate and barium titanate electronic function ceramic using laser |
| CN108428872A (en) * | 2018-03-23 | 2018-08-21 | 陈红梅 | A kind of nickelic ternary electrode material of lithium battery and preparation method |
-
2007
- 2007-03-29 CN CN 200710200363 patent/CN101041588A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302100B (en) * | 2008-06-30 | 2011-06-22 | 贵州大学 | Material and method for preparing strontium titanate and barium titanate electronic function ceramic using laser |
| CN108428872A (en) * | 2018-03-23 | 2018-08-21 | 陈红梅 | A kind of nickelic ternary electrode material of lithium battery and preparation method |
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Open date: 20070926 |