GB1510602A - Electro-acoustic transducer - Google Patents
Electro-acoustic transducerInfo
- Publication number
- GB1510602A GB1510602A GB2529776A GB2529776A GB1510602A GB 1510602 A GB1510602 A GB 1510602A GB 2529776 A GB2529776 A GB 2529776A GB 2529776 A GB2529776 A GB 2529776A GB 1510602 A GB1510602 A GB 1510602A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- piezoelectric
- piezoelectric element
- linbo
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 6
- 229910052760 oxygen Inorganic materials 0.000 abstract 6
- 239000001301 oxygen Substances 0.000 abstract 6
- 229910013641 LiNbO 3 Inorganic materials 0.000 abstract 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract 3
- 230000015556 catabolic process Effects 0.000 abstract 2
- 238000006731 degradation reaction Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000012777 electrically insulating material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 229910052763 palladium Inorganic materials 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
- B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
- B06B1/0666—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface used as a diaphragm
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
1510602 Piezoelectric transducers TOKYO SHIBAURA ELECTRIC CO Ltd 18 June 1976 [24 June 1975] 25297/76 Heading H4J An electro-acoustic transducer comprises a housing 12 having a permanently polarized piezoelectric element 2 (e.g. of LiNbO 3 or LiTaO 3 ) which releases oxygen when heated to 200‹C. and more and an unpolarized element 5 having no piezoelectric action (e.g. of LiNbO 3 or LiTaO 3 ) which also releases oxygen when heated to 200‹C. and more. The construction minimizes degradation of the piezoelectric element 2 through loss of oxygen due, for example, to oxidation of the inner wall of housing 12. The amounts of oxygen given off from the piezoelectric element 2 and the unpolarized element 5 depends on the volume of elements 2 and 5. Thus if the two elements are both of the same material (e.g. LiNbO 3 ) and the volumetric ratio of the piezoelectric element 2 to the unpolarized element 5 is 1:9, then 10% of the amount of oxygen necessary for the regain of the pressure equilibrium is evolved from piezoelectric element 2 and the remainder is evolved from element 5. Thus a relatively small amount is released from element 2, thereby substantially reducing its degradation with time. The element 5 is preferably made from electrically insulating material and has a lead 6 extending through it to a palladium element 4. Lead 6 is connected to the centre wire 11 of coaxial cable 9. The palladium electrode 4 assists in containing oxygen in the piezoelectric element 2. The device may be a transmitter or receiver of vibrations from the wall 2 of housing 12.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7808475A JPS522392A (en) | 1975-06-24 | 1975-06-24 | Electricity-sound converting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1510602A true GB1510602A (en) | 1978-05-10 |
Family
ID=13651969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2529776A Expired GB1510602A (en) | 1975-06-24 | 1976-06-18 | Electro-acoustic transducer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS522392A (en) |
| GB (1) | GB1510602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019228862A1 (en) * | 2018-05-30 | 2019-12-05 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Process for producing a piezoelectric sensor and piezoelectric sensor obtained by means of such a process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57151851A (en) * | 1981-03-16 | 1982-09-20 | Aloka Co Ltd | Ultrasonic contact probe |
-
1975
- 1975-06-24 JP JP7808475A patent/JPS522392A/en active Granted
-
1976
- 1976-06-18 GB GB2529776A patent/GB1510602A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019228862A1 (en) * | 2018-05-30 | 2019-12-05 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Process for producing a piezoelectric sensor and piezoelectric sensor obtained by means of such a process |
| FR3082054A1 (en) * | 2018-05-30 | 2019-12-06 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | METHOD FOR MANUFACTURING A PIEZOELECTRIC SENSOR AND PIEZOELECTRIC SENSOR OBTAINED BY SUCH A METHOD |
| US11714100B2 (en) | 2018-05-30 | 2023-08-01 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Process for producing a piezoelectric sensor and piezoelectric sensor obtained by means of such a process |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2628260A1 (en) | 1977-03-10 |
| JPS566758B2 (en) | 1981-02-13 |
| DE2628260B2 (en) | 1977-06-23 |
| JPS522392A (en) | 1977-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |