JPH0332957B2 - - Google Patents
Info
- Publication number
- JPH0332957B2 JPH0332957B2 JP59209453A JP20945384A JPH0332957B2 JP H0332957 B2 JPH0332957 B2 JP H0332957B2 JP 59209453 A JP59209453 A JP 59209453A JP 20945384 A JP20945384 A JP 20945384A JP H0332957 B2 JPH0332957 B2 JP H0332957B2
- Authority
- JP
- Japan
- Prior art keywords
- beryllium
- titanium
- diaphragm
- modulus
- young
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 15
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 15
- 229910052719 titanium Inorganic materials 0.000 claims description 14
- 239000010936 titanium Substances 0.000 claims description 14
- 229910052790 beryllium Inorganic materials 0.000 claims description 12
- 238000009792 diffusion process Methods 0.000 claims description 6
- 150000001573 beryllium compounds Chemical class 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- JZKFIPKXQBZXMW-UHFFFAOYSA-L beryllium difluoride Chemical compound F[Be]F JZKFIPKXQBZXMW-UHFFFAOYSA-L 0.000 description 1
- 229910001633 beryllium fluoride Inorganic materials 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
産業上の利用分野
本発明はチタニウム或いはチタニウム合金をベ
リリウム化処理して、その表面にチタニウム−ベ
リリウム化物層を形成せしめた耐食性、耐久性に
優れ、高硬度、高ヤング率のスピーカー振動板の
製造方法に関するものである。
従来技術
通常、高域用スピーカー振動板としてチタニウ
ム、アルミニウム、ベリリウム等の軽金属あるい
はチタニウムをホウ化、炭化、窒化等の処理をし
たり、アルミニウムをアルマイト処理して特性の
改善を計り、また他の方法として高いヤング率の
繊維を含有する強化繊維複合材料が用いられてい
る。
一般にスピーカーの能率が高く、過度特性が良
好であるためには振動板の重量（ρ）はできるだ
け小さくヤング率Ｅは大きいことが望ましい。加
工容易なため通常用いられているチタニウム、ア
ルミニウムは高域用スピーカー振動板としては満
足な音速
Industrial Application Fields The present invention is for producing a speaker diaphragm with excellent corrosion resistance, durability, high hardness, and high Young's modulus by subjecting titanium or titanium alloy to beryllium treatment and forming a titanium-beryllium compound layer on its surface. It is about the method. Conventional technology Normally, light metals such as titanium, aluminum, beryllium, etc. or titanium are treated with boriding, carbonizing, nitriding, etc. for high-frequency speaker diaphragms, aluminum is treated with alumite to improve its characteristics, and other materials are used. As a method, a reinforced fiber composite material containing fibers with a high Young's modulus is used. Generally, in order for a speaker to have high efficiency and good transient characteristics, it is desirable that the weight (ρ) of the diaphragm be as small as possible and the Young's modulus E be large. Titanium and aluminum, which are commonly used because they are easy to process, have a satisfactory sound velocity for high-frequency speaker diaphragms.
【式】を有しているとはいえない。
そこで、前述のようにこれらの金属表面を処理
してホウ化チタン、炭化チタン、窒化チタン、或
いはアルマイトなどの皮膜を施した振動板が開発
され高級スピーカーとして実用に供されるように
なつた。またベリリウムも真空蒸着法で振動板に
成形し実用化されている。
発明が解決しようとする問題点
しかしながらホウ化チタン、炭化チタン、窒化
チタン、アルマイトなどの処理金属は処理皮膜は
数μ以下の厚さであり、チタニウムやアルミニウ
ムの下地金属の厚さに比べて非常に薄いため第１
表に示すようにヤング率を大幅に高めるに至つて
いない。またベリリウムは蒸着法でしか振動板に
成形できないので工数がかゝり非常に高価なもの
となつている。
本発明は上記の現状に鑑みて成されたものであ
り、スピーカー振動板用材料として従来のものよ
り優れたものを提供しようとするものである。
問題点を解決するための手段
本発明はこの目的を達成するため基材としてチ
タニウム或いはチタニウム合金を所望の形状に成
形した後、ベリリウム或いはベリリウム化合物を
含む充填物中に埋没せしめ熱処理により基材の表
面にチタニウム−ベリリウム化合物の層を形成す
るスピーカー振動板の製造方法である。
作 用
以下の実施例に示すように拡散熱処理にて極め
て大きなヤング率と低密度を有する従来の材料で
は得られなかつた新規な振動材料を得んとするも
のである。
実施例
以下本発明の一実施例について説明する。
実施例 １
振動板基材となるチタン或いは合金は厚さ30μ
の箔を用い、振動板形状にプレス成形する。チタ
ンは酸化に対し安定な金属であるがベリリウム拡
散処理の前にエツチングにより新しい金属面を出
しておくのが好ましい。
先ず、ベリリウム粉末５〜10重量％、アルミナ
粉末90〜95重量％に弗化アンモニウムを約１重量
％混合し、上記振動板成形物をこの混合粉末中に
埋没させ不活性ガス中にて、900〜1200℃でベリ
リウムの拡散熱処理を１〜２時間継続させると拡
散深さ５〜10μのチタニウム−ベリリウム化物層
が基材の両面に形成される。この形成層は処理温
度、時間により拡散深さを適宜選ぶことができ
る。このようにして形成されたチタニウム−ベリ
リウム化合物は金属チタンの約３〜５倍の微小硬
度を有し、特性は第１表に示すようにヤング率は
３〜3.5×1012dyne／cm2、密度3.5〜3.8であり高域
用スピーカー振動板材料として良好である。
実施例 ２
実施例１と同様のチタン箔成形品をベリリウム
粉末弗化ベリリウム、弗化カリ、塩化カリの溶融
塩に埋没させ800〜900℃でチタンにベリリウムを
浸透させるとTiBe2、TiBe12などのベリリウム化
物が形成される。この形成物の材料特性はヤング
率３×1012dyne／cm2、密度3.8程度で実施例１と
同様に良好な振動板材料である。他の一実施例と
してベリリウム粉末にチタニウムを埋没し５×
10-6mmHgの真空中で1000〜1100℃、１〜３時間
熱処理する方法にても同様にベリリウム化物が形
成される。
発明の効果
以上説明したように本発明によるチタニウム表
面にベリリウム化物層を形成した振動板材料は、
製造が容易であり得られたものは耐食性にも優
れ、高硬度、高ヤング率、低密度の材料であり、
能率が良く過渡特性に優れたスピーカー振動板で
ある。It cannot be said that it has [Formula]. Therefore, as mentioned above, diaphragms in which the surfaces of these metals are coated with titanium boride, titanium carbide, titanium nitride, or alumite have been developed and put into practical use as high-end speakers. Beryllium has also been put into practical use by being formed into diaphragms using the vacuum evaporation method. Problems to be Solved by the Invention However, the thickness of treated metals such as titanium boride, titanium carbide, titanium nitride, and alumite is several micrometers or less, which is extremely thick compared to the thickness of the base metal of titanium or aluminum. 1st because it is thin
As shown in the table, the Young's modulus has not been significantly increased. Also, beryllium can only be formed into a diaphragm by vapor deposition, which requires a lot of man-hours and is very expensive. The present invention has been made in view of the above-mentioned current situation, and aims to provide a material for a speaker diaphragm that is superior to conventional materials. Means for Solving the Problems In order to achieve this object, the present invention forms titanium or a titanium alloy into a desired shape as a base material, embeds it in a filler containing beryllium or a beryllium compound, and heat-treats the base material. This is a method of manufacturing a speaker diaphragm in which a layer of titanium-beryllium compound is formed on the surface. Function As shown in the following examples, the present invention aims to obtain a novel vibrating material that has an extremely large Young's modulus and a low density, which could not be obtained with conventional materials, through diffusion heat treatment. Example An example of the present invention will be described below. Example 1 Titanium or alloy used as the base material of the diaphragm has a thickness of 30μ
Using this foil, press-form it into the shape of a diaphragm. Although titanium is a metal that is stable against oxidation, it is preferable to expose a new metal surface by etching before the beryllium diffusion process. First, approximately 1% by weight of ammonium fluoride is mixed with 5 to 10% by weight of beryllium powder and 90 to 95% by weight of alumina powder, and the diaphragm molded product is embedded in this mixed powder and heated to 900% by weight in an inert gas. When the beryllium diffusion heat treatment is continued at ~1200° C. for 1 to 2 hours, a titanium-beryllium compound layer with a diffusion depth of 5 to 10 μm is formed on both sides of the substrate. The diffusion depth of this forming layer can be appropriately selected depending on the processing temperature and time. The titanium-beryllium compound thus formed has a microhardness about 3 to 5 times that of metallic titanium, and its properties are as shown in Table 1, with a Young's modulus of 3 to 3.5×10 12 dyne/cm 2 , It has a density of 3.5 to 3.8, making it a good material for high-frequency speaker diaphragms. Example 2 When a titanium foil molded product similar to Example 1 is buried in molten salt of beryllium powder beryllium fluoride, potassium fluoride, and potassium chloride and beryllium is infiltrated into the titanium at 800 to 900°C, TiBe 2 , TiBe 12 , etc. of beryllium is formed. The material properties of this formed material are a Young's modulus of 3×10 12 dyne/cm 2 and a density of about 3.8, making it a good diaphragm material as in Example 1. As another example, titanium is embedded in beryllium powder and
A beryllium compound is similarly formed by a method of heat treatment at 1000 to 1100° C. for 1 to 3 hours in a vacuum of 10 −6 mmHg. Effects of the Invention As explained above, the diaphragm material in which a beryllium compound layer is formed on the titanium surface according to the present invention has the following characteristics:
It is easy to manufacture, and the resulting material has excellent corrosion resistance, high hardness, high Young's modulus, and low density.
This is a speaker diaphragm that is highly efficient and has excellent transient characteristics.
Claims (1)
基材をベリリウム或いはベリリウム化合物を含む
充填物中に埋没せしめ略900〜1200℃の加熱しベ
リリウムの拡散熱処理をして、基材の表面からベ
リリウムを拡散せしめ基材の表面にチタニウム−
ベリリウム化物層を形成することを特徴とするス
ピーカー振動板の製造方法。1 The formed titanium or titanium alloy base material is buried in a filler containing beryllium or a beryllium compound, and heated to approximately 900 to 1200°C to perform beryllium diffusion heat treatment to diffuse beryllium from the surface of the base material. titanium on the surface of
A method for manufacturing a speaker diaphragm, comprising forming a beryllium compound layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20945384A JPS6188698A (en) | 1984-10-05 | 1984-10-05 | Diaphragm for speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20945384A JPS6188698A (en) | 1984-10-05 | 1984-10-05 | Diaphragm for speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6188698A JPS6188698A (en) | 1986-05-06 |
| JPH0332957B2 true JPH0332957B2 (en) | 1991-05-15 |
Family
ID=16573120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20945384A Granted JPS6188698A (en) | 1984-10-05 | 1984-10-05 | Diaphragm for speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6188698A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5451521A (en) * | 1977-09-29 | 1979-04-23 | Akai Electric | Preparation of diaphragm for speaker |
-
1984
- 1984-10-05 JP JP20945384A patent/JPS6188698A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5451521A (en) * | 1977-09-29 | 1979-04-23 | Akai Electric | Preparation of diaphragm for speaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6188698A (en) | 1986-05-06 |
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