DE914074C - Process for the production of ceramic oscillating bodies - Google Patents

Process for the production of ceramic oscillating bodies

Info

Publication number
DE914074C
DE914074C DES25562A DES0025562A DE914074C DE 914074 C DE914074 C DE 914074C DE S25562 A DES25562 A DE S25562A DE S0025562 A DES0025562 A DE S0025562A DE 914074 C DE914074 C DE 914074C
Authority
DE
Germany
Prior art keywords
ceramic
production
polarization
oscillating bodies
ceramic oscillating
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
Application number
DES25562A
Other languages
German (de)
Inventor
Dr Sc Nat Siegfried Pforte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DES25562A priority Critical patent/DE914074C/en
Application granted granted Critical
Publication of DE914074C publication Critical patent/DE914074C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/853—Ceramic compositions
    • H10N30/8536—Alkaline earth metal based oxides, e.g. barium titanates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/04—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning
    • H10N30/045—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning by polarising
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/01—Manufacture or treatment
    • H10N30/09—Forming piezoelectric or electrostrictive materials
    • H10N30/093—Forming inorganic materials
    • H10N30/097—Forming inorganic materials by sintering

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

Verfahren zum Herstellen von keramischen Schwingkörpern Gegenstand der Erfindung ist ein Verfahren zur Herstellung keramischer Schwinger, insbesondere Bariumtitanatschwinger. Bekanntlich werden diese Schwinger in der Weise angefertigt, daß zunächst die Keramikrohmasse in die gewünschte Form gebracht und gebrannt und daß anschließend der so hergestellte Keramikschwinger durch eine elektrische Behandlung polarissert wird. Durch diese Polarisation erhält der Keramikkörper seine piezoelektrischen Eigenschaften. Die Polarisation des Schwingkörpers muß bei Schwingern, die nach diesem bekannten Verfahren hergestellt sind, von Zeit zu Zeit wiederholt werden, da der Polarisationseffekt mit der Zeit abnimmt. Mit dem Verfahren nach der Erfindung gelängt es, Keramikschwinger von lang haltender Polarisation herzustellen, wobei noch dazu die zur Polarisation notwendigen Richtkräfte kleiner gehalten werden können. Gemäß der Erfindung wird dabei so vorgegangen, daß die Polarisation der Keramikmasse unmittelbar während des Brennens und/oder des darauffolgenden Abkühlens vorgenommen wird.Process for the production of ceramic vibrating bodies. Subject The invention is a method of making ceramic vibrators, in particular Barium titanate transducer. As is well known, these transducers are made in the manner that first the ceramic raw material brought into the desired shape and fired and that then the ceramic oscillator produced in this way is subjected to an electrical treatment is polarized. This polarization gives the ceramic body its piezoelectric Properties. The polarization of the oscillating body must be used in oscillators that are after these known processes are made, are repeated from time to time, because the polarization effect decreases over time. With the method according to the invention succeeded in producing ceramic transducers of long-lasting polarization, whereby in addition, the directional forces necessary for polarization can be kept smaller. According to the invention, the procedure is that the polarization of the ceramic mass carried out immediately during the firing and / or the subsequent cooling will.

Der Vorteil der Erfindung wird an Hand folgender Überlegung deutlich: Während des Brennens, also zuzeiten, bei denen der Keramikkörper noch heiß und damit auch noch weicher ist, können die einzelnen Gefügeteilchen den sie bewegenden Polarisationskräften leichter und in größerem Maße folgen. Das gleiche gilt in gewissem Umfang auch für die Zeitdauer der Abkühlung nach dem Brennen. Es sind also kleinere Richtkräfte zur Polarisation des Körpers notwendig. Diese so aufgebrachte Polarisation ist nach beendeter Abkühlung, da sie schon vor dem Erreichen des abgekühlten bzw. erstarrten Zustandes dem Gut eigen war, erheblich beständiger.The advantage of the invention becomes clear from the following consideration: During the firing, i.e. at times when the ceramic body is still hot and therefore is even softer, the individual structural particles can affect the polarization forces that move them follow more easily and to a greater extent. The same is true in some ways Extent also for the time it takes to cool down after firing. So there are smaller ones Directional forces necessary to polarize the body. This polarization applied in this way is at the end of the cooling process, as it is already before the cooled down resp. solidified condition was inherent in the property, considerably more constant.

Claims (1)

PATENTANSPRUCH: Verfahren zum Herstellen von keramischen Schwingkörpern, insbesondere aus Bariumtitanat, dadurch gekennzeichnet, daß das Polarisieren des Schwingkörpers unmittelbar während des Brennens und/oder des darauffolgenden Abkühlens vorgenommen wird:PATENT CLAIM: Process for the production of ceramic oscillating bodies, in particular made of barium titanate, characterized in that the polarization of the Vibrating body immediately during the firing and / or the subsequent cooling is carried out:
DES25562A 1951-11-10 1951-11-10 Process for the production of ceramic oscillating bodies Expired DE914074C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES25562A DE914074C (en) 1951-11-10 1951-11-10 Process for the production of ceramic oscillating bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES25562A DE914074C (en) 1951-11-10 1951-11-10 Process for the production of ceramic oscillating bodies

Publications (1)

Publication Number Publication Date
DE914074C true DE914074C (en) 1954-06-24

Family

ID=7478395

Family Applications (1)

Application Number Title Priority Date Filing Date
DES25562A Expired DE914074C (en) 1951-11-10 1951-11-10 Process for the production of ceramic oscillating bodies

Country Status (1)

Country Link
DE (1) DE914074C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146273B (en) * 1958-07-01 1963-03-28 Sonotone Corp Pick-up for scanning mechanically recorded vibrations or cutting box for recording a vibration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146273B (en) * 1958-07-01 1963-03-28 Sonotone Corp Pick-up for scanning mechanically recorded vibrations or cutting box for recording a vibration

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