CN104446464A - Buzzer suitable for two-time reflow soldering temperature - Google Patents
Buzzer suitable for two-time reflow soldering temperature Download PDFInfo
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- CN104446464A CN104446464A CN201410623673.2A CN201410623673A CN104446464A CN 104446464 A CN104446464 A CN 104446464A CN 201410623673 A CN201410623673 A CN 201410623673A CN 104446464 A CN104446464 A CN 104446464A
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Abstract
The invention relates to a buzzer suitable for a two-time reflow soldering temperature and relates to a piezoelectric ceramics technology. The raw material of the piezoelectric ceramic piece for preparing the buzzer is a PZT (piezoelectric transducer) binary ceramic raw material which is doped with niobate which accounts for 5-7wt%, so that niobium lead zirconate titanate is prepared, and the general formula of niobium lead zirconate titanate is Pb0.988(Ti0.48Zr0.52)0.976Nb0.024O3. A preparation process comprises the following steps: roasting and mixing the raw materials; ball-milling and mixing; pre-pressing and moulding; synthesizing at a low temperature; ball-milling again; drying; sieving; moulding; arranging rubber and sintering; being electrodized; polarizing; and polarizing. The buzzer provided by the invention can be used for solving the problem that after high-temperature reflow soldering, the buzzer is free of piezoelectric property and umpolarization. As the piezoelectric ceramic piece contains a small amount of impure phases (5-7%), the Curie temperature TC is 380 DEG C, the buzzer can bear reflow soldering at 265 DEG C over 3 seconds, and umpolarization can be ignored. Adverse effects on the buzzer caused by high-temperature reflow soldering can be supported, and the endurance test service life of the buzzer can be prolonged by 3-5 times.
Description
Technical field
The present invention relates to piezoelectric ceramic technology, the piezo of espespecially a kind of adaptation twice reflow soldering temperature.
Background technology
Existing piezoelectric ceramics piezo has following deficiency:
Under the prerequisite that one, piezoelectric ceramics piezo are determined in physical dimension, frequency etc., after having lead, Lead-free Reflow Soldering, piezoelectric ceramic piece bulk comes off, and causes piezo to reduce without piezoelectric property or piezoelectric property.
Two, the long-time durable survey sound confirmatory experiment of piezoelectric ceramics piezo shows, piezoelectric ceramics piezo does not reach standard, has cracking phenomena.
Summary of the invention
The technical issues that need to address of the present invention are, overcome the problem of existing high temperature reflux postwelding piezo without piezoelectric property and umpolarization, provide the piezo of a kind of adaptation twice reflow soldering temperature.
For this reason, technical scheme of the present invention is:
The piezo of a kind of adaptation twice reflow soldering temperature, its material composition manufacturing the piezoelectric ceramic piece of piezo is doped with niobate in PZT binary system ceramics raw material, by weight, niobate deal is 5% ~ 7%, thus obtained niobium Pb-based lanthanumdoped zirconate titanates, general formula is Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3;
Its manufacturing process is:
Step 1, dries material, batching, is toasted by desired raw material, the moisture content in absorption raw material is discharged by general formula Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3, calculates required each raw material and weigh according to general formula;
Step 2, ball milling mixes, and makes its granularity reach≤1.5um, mixes, and obtains PZT piezoelectricity material powder;
Step 3, pre-molding, the compound powder briquetting that step 2 is obtained, in described compound powder, the water adding its raw material gross weight 4% ~ 6% is stirred before compacting, and raw material gross weight 1% ~ 3%, concentration 4% ~ 6% polyvinyl alcohol solution, and the dehydrated alcohol of raw material gross weight 1% ~ 3%, pressure-controlling, at 6MPa ~ 8MPa, adopts impact briquetting mode;
Step 4, low temperature synthesizes, and is synthesized by the material block of pre-molding in tunnel stove in 900 DEG C ~ 950 DEG C calcinings;
Step 5, again ball milling, implement ball mill pulverizing to the material block synthesized through low temperature, cause granularity to reach≤0.09um;
Step 6, dry, by the moisture content vaporization in material, electrothermal drying; Put into baking oven and toast 145 DEG C ~ 155 DEG C, 20h ~ 20h;
Step 7, sieves, and by the material toasted, is down to normal temperature, crosses 200 mesh sieves; Be prepared into molding mass powder;
Step 8, shaping, add several and water of Vltra tears, glycerine, alcohol in material powder, mixing, roll off, old and extrusion molding;
Step 9, binder removal, sintering, in circulation tunnel stove, binder removal, sinter ceramic plate into, sintering temperature 1280 DEG C ~ 1300 DEG C;
Step 10, by electrode, by the silver slurry of required diameter, thickness 0.01mm in the ceramic plate two surface silk screen printing of preparation, in tunnel stove, 340 DEG C ~ 360 DEG C oven dry, load in square crucible, put into tunnel stove 750 DEG C ~ 800 DEG C silver ink firings, Temperature fall, to room temperature, is made by silver-colored ceramic plate;
Step 11, polarization, will be put into automatic tunnel polarization machine by silver-colored ceramic plate and be warmed up to 140 DEG C ~ 160 DEG C, 3kv/mm ~ 5kv/mm voltage polarizing 15 minutes to 25 minutes, making general formula is
Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3 has the piezoelectricity pottery of piezoelectricity by silver strip.
The invention has the beneficial effects as follows:
One, uses piezoelectric ceramic piece of the present invention to manufacture piezo, can solve the problem of high temperature reflux postwelding piezo without piezoelectric property, umpolarization.Because piezoelectric ceramic piece of the present invention contains a small amount of dephasign (5% ~ 7%), Curie temperature TC=380 DEG C, can bear 265 DEG C of Reflow Solderings more than 3 seconds, umpolarization can be ignored.High temperature reflux can be born and weld the detrimentally affect that piezo is brought, the piezo durable checking life-span 3 ~ 5 times can be improved.
Its two, due to good compactness, lose cavity, intercrystalline cracking, physical strength is good, can not ftracture.
Accompanying drawing explanation
Fig. 1 is the Curie temperature test curve figure (in figure, Curie temperature is 380 DEG C) of the piezoelectric ceramic piece of piezo of the present invention;
Fig. 2 is the XRD test curve figure of the piezoelectric ceramic piece of piezo of the present invention;
Fig. 3 is the micro-test pattern of SEM of the piezoelectric ceramic piece of piezo of the present invention.
Embodiment
Below, the specific embodiment of the present invention is introduced.
Embodiment one
the piezo of a kind of adaptation twice reflow soldering temperature, its material composition manufacturing the piezoelectric ceramic piece of piezo is doped with niobate in PZT binary system ceramics raw material, by weight, niobate deal is 5% ~ 7%, thus obtained niobium Pb-based lanthanumdoped zirconate titanates, general formula is Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3.
Its manufacturing process is:
Step 1, dries material, batching, is toasted by desired raw material, the moisture content in absorption raw material is discharged by general formula Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3, calculates required each raw material and weigh according to general formula;
Step 2, ball milling mixes, and makes its granularity reach≤1.5um, mixes, and obtains PZT piezoelectricity material powder;
Step 3, pre-molding, the compound powder briquetting that step 2 is obtained, in described compound powder, the water adding its raw material gross weight 5% is stirred before compacting, and raw material gross weight 2%, concentration 5% polyvinyl alcohol solution, and the dehydrated alcohol of raw material gross weight 2%, pressure-controlling, at 6MPa ~ 8MPa, adopts impact briquetting mode;
Step 4, low temperature synthesizes, and is synthesized by the material block of pre-molding in tunnel stove in 900 DEG C ~ 950 DEG C calcinings;
Step 5, again ball milling, implement ball mill pulverizing to the material block synthesized through low temperature, cause granularity to reach≤0.09um;
Step 6, dry, by the moisture content vaporization in material, electrothermal drying; Put into baking oven and toast 150 DEG C, 20h; Dry the length of material time, according to feeded number and determine;
Step 7, sieves, and by the material toasted, is down to normal temperature, crosses 200 mesh sieves; Be prepared into molding mass powder;
Step 8, shaping, Vltra tears, glycerine, alcohol and water is added in material powder, mixing, roll off, old and extrusion molding, as added weight 2%, the Gonak of concentration 15 ~ 20%, 1% glycerine, 5% alcohol and water (determining to add appropriate filtered water according to the dry wet situation of compound) in material powder;
Step 9, binder removal and sintering, in circulation tunnel stove, binder removal, sinter ceramic plate into, sintering temperature 1280 DEG C ~ 1300 DEG C, insulation 1h binder removal, and existing technique sintering temperature needs 1320 DEG C ~ 1340 DEG C;
Step 10, by electrode, by the silver slurry of required diameter, thickness 0.01mm in the ceramic plate two surface silk screen printing of preparation, in tunnel stove, 350 DEG C of oven dry, load in square crucible, put into 780 DEG C, tunnel stove, be incubated 10-15 minute silver ink firing, Temperature fall, to room temperature, is made by silver-colored ceramic plate;
Step 11, polarization, will be put into automatic tunnel polarization machine by silver-colored ceramic plate and be warmed up to 150 DEG C, 3kv/mm ~ 5kv/mm voltage polarizing 20 minutes, making general formula is
Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3 has the piezoelectricity pottery of piezoelectricity by silver strip.
Embodiment two
The piezo of a kind of adaptation twice reflow soldering temperature, its material composition manufacturing the piezoelectric ceramic piece of piezo is doped with niobate in PZT binary system ceramics raw material, by weight, niobate deal is 6%, thus obtained niobium Pb-based lanthanumdoped zirconate titanates, general formula is Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3.
Its manufacturing process is identical with embodiment one.
Embodiment three
The piezo of a kind of adaptation twice reflow soldering temperature, its material composition manufacturing the piezoelectric ceramic piece of piezo is doped with niobate in PZT binary system ceramics raw material, by weight, niobate deal is 7%, thus obtained niobium Pb-based lanthanumdoped zirconate titanates, general formula is Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3.
Its manufacturing process is identical with embodiment one.
The above is only preferred embodiment of the present invention, not imposes any restrictions technical scope of the present invention.The technician of the industry, under the inspiration of the technical program, some distortion and amendment can be made, every above embodiment is done according to technical spirit of the present invention any amendment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (2)
1. one kind adapts to the piezo of twice reflow soldering temperature, it is characterized in that: manufacture the material composition of the piezoelectric ceramic piece of piezo for doped with niobate in PZT binary system ceramics raw material, by weight, niobate deal is 5% ~ 7%, thus obtained niobium Pb-based lanthanumdoped zirconate titanates, general formula is Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3;
Its manufacturing process is:
Step 1, dries material, batching, is toasted by desired raw material, the moisture content in absorption raw material is discharged by general formula Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3, calculates required each raw material and weigh according to general formula;
Step 2, ball milling mixes, and makes its granularity reach≤1.5um, mixes, and obtains PZT piezoelectricity material powder;
Step 3, pre-molding, the compound powder briquetting that step 2 is obtained, in described compound powder, the water adding its raw material gross weight 4% ~ 6% is stirred before compacting, and raw material gross weight 1% ~ 3%, concentration 4% ~ 6% polyvinyl alcohol solution, and the dehydrated alcohol of raw material gross weight 1% ~ 3%, pressure-controlling, at 6MPa ~ 8MPa, adopts impact briquetting mode;
Step 4, low temperature synthesizes, and is synthesized by the material block of pre-molding in tunnel stove in 900 DEG C ~ 950 DEG C calcinings;
Step 5, again ball milling, implement ball mill pulverizing to the material block synthesized through low temperature, cause granularity to reach≤0.09um;
Step 6, dry, by the moisture content vaporization in material, electrothermal drying; Put into baking oven and toast 145 DEG C ~ 155 DEG C, 20h ~ 20h;
Step 7, sieves, and by the material toasted, is down to normal temperature, crosses 200 mesh sieves; Be prepared into molding mass powder;
Step 8, shaping, add several and water of Vltra tears, glycerine, alcohol in material powder, mixing, roll off, old and extrusion molding;
Step 9, binder removal, sintering, in circulation tunnel stove, binder removal, sinter ceramic plate into, sintering temperature 1280 DEG C ~ 1300 DEG C;
Step 10, by electrode, by the silver slurry of required diameter, thickness 0.01mm in the ceramic plate two surface silk screen printing of preparation, in tunnel stove, 340 DEG C ~ 360 DEG C oven dry, load in square crucible, put into tunnel stove 750 DEG C ~ 800 DEG C silver ink firings, Temperature fall, to room temperature, is made by silver-colored ceramic plate;
Step 11, polarization, will be put into automatic tunnel polarization machine by silver-colored ceramic plate and be warmed up to 140 DEG C ~ 160 DEG C, 3kv/mm ~ 5kv/mm voltage polarizing 15 minutes to 25 minutes, making general formula is
Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3 has the piezoelectricity pottery of piezoelectricity by silver strip.
2. the piezo of a kind of adaptation according to claim 1 twice reflow soldering temperature, it is characterized in that: manufacture the material composition of the piezoelectric ceramic piece of piezo for doped with niobate in PZT binary system ceramics raw material, by weight, niobate deal is 6%, thus obtained niobium Pb-based lanthanumdoped zirconate titanates, general formula is Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3;
Its manufacturing process is:
Step 1, dries material, batching, is toasted by desired raw material, the moisture content in absorption raw material is discharged by general formula Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3, calculates required each raw material and weigh according to general formula;
Step 2, ball milling mixes, and makes its granularity reach≤1.5um, mixes, and obtains PZT piezoelectricity material powder;
Step 3, pre-molding, the compound powder briquetting that step 2 is obtained, in described compound powder, the water adding its raw material gross weight 4% ~ 6% is stirred before compacting, and raw material gross weight 1% ~ 3%, concentration 4% ~ 6% polyvinyl alcohol solution, and the dehydrated alcohol of raw material gross weight 1% ~ 3%, pressure-controlling, at 6MPa ~ 8MPa, adopts impact briquetting mode;
Step 4, low temperature synthesizes, and is synthesized by the material block of pre-molding in tunnel stove in 900 DEG C ~ 950 DEG C calcinings;
Step 5, again ball milling, implement ball mill pulverizing to the material block synthesized through low temperature, cause granularity to reach≤0.09um;
Step 6, dry, by the moisture content vaporization in material, electrothermal drying; Put into baking oven and toast 145 DEG C ~ 155 DEG C, 20h ~ 20h;
Step 7, sieves, and by the material toasted, is down to normal temperature, crosses 200 mesh sieves; Be prepared into molding mass powder;
Step 8, shaping, add several and water of Vltra tears, glycerine, alcohol in material powder, mixing, roll off, old and extrusion molding;
Step 9, binder removal, sintering, in circulation tunnel stove, binder removal, sinter ceramic plate into, sintering temperature 1280 DEG C ~ 1300 DEG C;
Step 10, by electrode, by the silver slurry of required diameter, thickness 0.01mm in the ceramic plate two surface silk screen printing of preparation, in tunnel stove, 340 DEG C ~ 360 DEG C oven dry, load in square crucible, put into tunnel stove 750 DEG C ~ 800 DEG C silver ink firings, Temperature fall, to room temperature, is made by silver-colored ceramic plate;
Step 11, polarization, will be put into automatic tunnel polarization machine by silver-colored ceramic plate and be warmed up to 140 DEG C ~ 160 DEG C, 3kv/mm ~ 5kv/mm voltage polarizing 15 minutes to 25 minutes, making general formula is
Pb0.988 (Ti0.48Zr0.52) 0.976Nb0.024O3 has the piezoelectricity pottery of piezoelectricity by silver strip.
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| CN201410623673.2A CN104446464B (en) | 2014-11-07 | 2014-11-07 | A kind of piezo adapting to twice reflow soldering temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473773A (en) * | 2017-08-14 | 2017-12-15 | 戴承萍 | A kind of manufacture craft of the thin piezo of small size |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2886967Y (en) * | 2006-04-20 | 2007-04-04 | 常州美欧电子有限公司 | Cofired multilayer piezoelectric ceramic buzzer chip |
| CN102832335A (en) * | 2012-08-27 | 2012-12-19 | 宁波凯普电子有限公司 | Polarization clamp and polarization method of piezoelectric ceramic feedback type buzzer silver sheets |
| CN203102850U (en) * | 2012-12-26 | 2013-07-31 | 徐维雄 | Piezoelectric type buzzer |
| CN103594077A (en) * | 2013-11-28 | 2014-02-19 | 哈尔滨固泰电子有限责任公司 | Car alarm with piezoelectric ceramic buzzer piece pressed through ultrasonic welding |
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2014
- 2014-11-07 CN CN201410623673.2A patent/CN104446464B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2886967Y (en) * | 2006-04-20 | 2007-04-04 | 常州美欧电子有限公司 | Cofired multilayer piezoelectric ceramic buzzer chip |
| CN102832335A (en) * | 2012-08-27 | 2012-12-19 | 宁波凯普电子有限公司 | Polarization clamp and polarization method of piezoelectric ceramic feedback type buzzer silver sheets |
| CN203102850U (en) * | 2012-12-26 | 2013-07-31 | 徐维雄 | Piezoelectric type buzzer |
| CN103594077A (en) * | 2013-11-28 | 2014-02-19 | 哈尔滨固泰电子有限责任公司 | Car alarm with piezoelectric ceramic buzzer piece pressed through ultrasonic welding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473773A (en) * | 2017-08-14 | 2017-12-15 | 戴承萍 | A kind of manufacture craft of the thin piezo of small size |
| CN107473773B (en) * | 2017-08-14 | 2020-11-03 | 湖南嘉业达电子有限公司 | Manufacturing process of small-size thin buzzer |
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| CN104446464B (en) | 2016-10-12 |
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Address after: 523000 Guangdong province Dongguan wangniudunzhen Newton Hengli Village Industrial Park Applicant after: Guangdong wisdom intelligent Polytron Technologies Inc Address before: 523000 Guangdong province Dongguan wangniudunzhen Newton Hengli Village Industrial Park Applicant before: Dongguan Sweet Sound Electronics Co., Ltd. |
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