JPH0478580B2 - - Google Patents
Info
- Publication number
- JPH0478580B2 JPH0478580B2 JP63245099A JP24509988A JPH0478580B2 JP H0478580 B2 JPH0478580 B2 JP H0478580B2 JP 63245099 A JP63245099 A JP 63245099A JP 24509988 A JP24509988 A JP 24509988A JP H0478580 B2 JPH0478580 B2 JP H0478580B2
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- sintering
- ions
- strontium
- aqueous solution
- 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
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 36
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
- 238000005245 sintering Methods 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 239000010936 titanium Substances 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 13
- 235000006408 oxalic acid Nutrition 0.000 claims description 12
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 claims description 12
- 229910052719 titanium Inorganic materials 0.000 claims description 12
- 239000002244 precipitate Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- -1 titanium ions Chemical class 0.000 claims description 9
- 239000012298 atmosphere Substances 0.000 claims description 8
- 229910001427 strontium ion Inorganic materials 0.000 claims description 8
- 238000000137 annealing Methods 0.000 claims description 5
- 239000012300 argon atmosphere Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 9
- 239000000843 powder Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910002367 SrTiO Inorganic materials 0.000 description 4
- 238000000280 densification Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 2
- 150000003608 titanium Chemical class 0.000 description 2
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はチタン酸ストロンチウムSrTiO3の透
光性焼結体の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a translucent sintered body of strontium titanate SrTiO 3 .
この透光性焼結体は耐熱採光用窓やレンズ等に
利用される。 This translucent sintered body is used for heat-resistant lighting windows, lenses, etc.
従来技術
従来のチタン酸ストロンチウムの焼結体の製造
法としては、炭酸ストロンチウムと酸化チタンの
混合粉末を使用し、
(1) 焼結温度を上げて拡散速度を速めたり、ある
いは減圧下で焼結したりして気孔のない焼結体
を製造する方法。Conventional technology The conventional method for producing sintered bodies of strontium titanate uses a mixed powder of strontium carbonate and titanium oxide. A method of producing a sintered body without pores.
(2) 不純物を加えて液相焼結させる方法。(2) A method of adding impurities and performing liquid phase sintering.
(3) 外因部に不純物を固溶させて焼結性を高める
方法。(3) A method to improve sinterability by dissolving impurities in the external part.
等が知られている。etc. are known.
しかしながら、これらの方法では透明なチタン
酸ストロンチウムの焼結体を得ることができなか
つた。 However, by these methods, it was not possible to obtain a transparent sintered body of strontium titanate.
従来、他のセラミツクスの透光性焼結体は知ら
れているが、それらの製造には1800℃以上の高温
を必要とすることから、より低温で製造できる透
光性焼結体が要望されている。 Conventionally, translucent sintered bodies of other ceramics have been known, but since they require high temperatures of 1800°C or higher to produce, there is a demand for translucent sintered bodies that can be produced at lower temperatures. ing.
発明の目的
本発明の目的は、優れた透光性を有すると共に
不純物の混入のない高純度のチタン酸ストロンチ
ウムの焼結体を従来の透光性セラミツク焼結体の
焼結温度より低温で容易に製造する方法を提供す
るにある。Purpose of the Invention The object of the present invention is to easily produce a sintered body of high-purity strontium titanate that has excellent translucency and is free of impurities at a temperature lower than the sintering temperature of conventional translucent ceramic sintered bodies. To provide a method for manufacturing.
発明の構成
本発明者等は前記目標を達成すべく鋭意研究の
結果、チタンイオンとストロンチウムイオンを１
対１モル割合で含む水溶液はシユウ酸のエタノー
ル溶液と接触すると、水に全く不溶な沈殿を形成
する特性があることに着目し、チタンイオンとス
トロンチウムイオンを１対１モル割合で含む水溶
液をシユウ酸のエタノール溶液と接触させ共沈さ
せると、均一でしかも高純度の微粒子が得られ、
この共沈物を熱分解して得られた酸化物粉末を酸
素雰囲気中で一次焼結し、次いでアルゴン雰囲気
中でガス圧焼結した後、空気中あるいは酸素雰囲
気中で焼鈍すると、優れた透光性を有するチタン
酸ストロンチウムの焼結体が得られることを究明
し得た。この知見に基づいて本発明を完成した。Structure of the Invention As a result of intensive research to achieve the above-mentioned goal, the present inventors have discovered that titanium ions and strontium ions are
Focusing on the fact that an aqueous solution containing titanium ions and strontium ions at a 1:1 molar ratio has the property of forming a precipitate that is completely insoluble in water when it comes into contact with an ethanol solution of oxalic acid, an aqueous solution containing titanium ions and strontium ions at a 1:1 molar ratio was used. When brought into contact with an acidic ethanol solution and co-precipitated, uniform and highly pure fine particles can be obtained.
The oxide powder obtained by thermally decomposing this coprecipitate is first sintered in an oxygen atmosphere, then gas-pressure sintered in an argon atmosphere, and then annealed in air or an oxygen atmosphere, resulting in excellent transparency. It has been found that a sintered body of strontium titanate having optical properties can be obtained. The present invention was completed based on this knowledge.
本発明の要旨は、
チタンイオンとストロンチウムイオンを１対１
モル割合で含む水溶液を、シユウ酸のエタノール
溶液と接触させて沈殿物を生成させ、生成沈殿物
を熱分解し、成形した後、酸素雰囲気中で焼結
し、次いでアルゴン雰囲気中でガス圧焼結した
後、空気中あるいは酸素雰囲気中で焼鈍すること
を特徴とするチタン酸ストロンチウムの透光性焼
結体の製造法にある。本発明において使用するチ
タンイオンを含む溶液としては、例えば四塩化チ
タンもしくはオキシ硝酸チタンの水溶液が使用さ
れる。またストロンチウムイオンを含む水溶液と
しては、例えば硝酸塩、炭酸塩などの水あるいは
酸に可溶な塩を水または酸に溶解させたものが使
用される。 The gist of the present invention is to combine titanium ions and strontium ions one to one.
An aqueous solution containing a molar ratio of The present invention provides a method for producing a translucent sintered body of strontium titanate, which comprises annealing in air or an oxygen atmosphere after sintering. As the solution containing titanium ions used in the present invention, for example, an aqueous solution of titanium tetrachloride or titanium oxynitrate is used. Further, as the aqueous solution containing strontium ions, for example, a solution obtained by dissolving water- or acid-soluble salts such as nitrates and carbonates in water or acid is used.
シユウ酸を多量のエタノールに溶解してシユウ
酸のエタノール溶液を作る。シユウ酸量はチタン
酸ストロンチウム１モルに対し２モルの割合がよ
い。シユウ酸とエタノールとの割合は、シユウ酸
１モルに対しエタノールが200モル程度までであ
ることがのぞましい。 An ethanol solution of oxalic acid is prepared by dissolving oxalic acid in a large amount of ethanol. The amount of oxalic acid is preferably 2 moles per 1 mole of strontium titanate. The ratio of oxalic acid and ethanol is preferably about 200 moles of ethanol to 1 mole of oxalic acid.
次に、シユウ酸のエタノール溶液にチタンイオ
ンとストロンチウムイオンを含む水溶液と接触さ
せてチタン酸ストロンチウムの前駆体の沈殿を生
成させる。この場合の接触法としては、(1)シユウ
酸のエタノール溶液中に構成金属イオン水溶液を
滴下する方法、(2)構成金属イオン水溶液中にシユ
ウ酸のエタノール溶液を滴下する方法があるが、
(2)の方法が好ましい。 Next, the ethanol solution of oxalic acid is brought into contact with an aqueous solution containing titanium ions and strontium ions to form a precipitate of a strontium titanate precursor. In this case, contact methods include (1) dropping an aqueous solution of constituent metal ions into an aqueous solution of oxalic acid, and (2) dropping an ethanolic solution of oxalic acid into an aqueous solution of constituent metal ions.
Method (2) is preferred.
得られた沈殿物はロ過して、エタノール中に再
分散させて沈殿物中に含まれる硝酸イオン、塩素
イオンを除くことが望ましい。 It is desirable to filter the obtained precipitate and redisperse it in ethanol to remove nitrate ions and chloride ions contained in the precipitate.
該沈殿物を450−1100℃で熱分解する。この熱
分解は低温であることが望ましいが、低過ぎると
熱分解が不完全となり焼結体が破損し易くなり、
また高過ぎると粒子の成長が著しくなり焼結に悪
影響を及ぼすので前記温度範囲であることが好ま
しい。この熱分解により粒径0.3μmの微粒子が得
られる。この微粒子を150−1000Kg／cm2で一次成
形する。一次成形の圧力が高過ぎると成形体に歪
が生ずるので、成形体が崩れない程度の低圧が好
ましい。従つて前記圧の範囲であることが望まし
い。得られた成形物をラバープレスにより
1.5ton／cm2 以上の圧力で二次成形する。 The precipitate is pyrolyzed at 450-1100°C. It is desirable that this thermal decomposition is carried out at a low temperature, but if the temperature is too low, the thermal decomposition will be incomplete and the sintered body will be easily damaged.
Furthermore, if the temperature is too high, the growth of particles will be significant and will have a negative effect on sintering, so it is preferable that the temperature is within the above range. This thermal decomposition yields fine particles with a particle size of 0.3 μm. The fine particles are primarily formed at 150-1000 kg/cm 2 . If the pressure for primary molding is too high, distortion will occur in the molded product, so it is preferable to use a low pressure that does not cause the molded product to collapse. Therefore, it is desirable that the pressure be within the above range. The obtained molded product is pressed using a rubber press.
Secondary molding is performed at a pressure of 1.5ton/cm2 or more .
この成形物を酸素雰囲気中で1200−1450℃で１
−100時間一次焼結する。この焼結はチタン酸ス
トロンチウムの粒子の粒成長と緻密化を行うもの
で、これにより次のアルゴン雰囲気でのガス圧焼
結時の焼結・緻密化を促進する。 This molded product was heated to 1200-1450℃ in an oxygen atmosphere.
- Primary sintering for 100 hours. This sintering causes grain growth and densification of the strontium titanate particles, thereby promoting sintering and densification during the subsequent gas pressure sintering in an argon atmosphere.
これにより相対密度が90％以上の焼結体が得ら
れる。焼結温度が低過ぎると焼結が進行せず、高
過ぎると焼結体中のSr成分が蒸発して相対密度
の大きい焼結体が得難い。従つて前記温度範囲で
焼結することが好ましい。 As a result, a sintered body having a relative density of 90% or more can be obtained. If the sintering temperature is too low, sintering will not proceed, and if it is too high, the Sr component in the sintered body will evaporate, making it difficult to obtain a sintered body with a high relative density. Therefore, it is preferable to sinter within the above temperature range.
この焼成体をアルゴン雰囲気中でガス圧焼結す
る。例えば1200−1500℃で500−2000Kg／cm2で１
−10時間焼結する。即ち、焼結体中の気孔を消滅
させて緻密化を促進する。得られる焼結体は僅か
に還元され黒色となる。この場合、一次焼結体し
ないで、アルゴン圧焼結すると焼結体内部の気孔
中にアルゴンが侵入して緻密化を阻害して良好な
焼結体とならない。従つて、酸素雰囲気中で一次
焼結した後、この焼結を行うことが必要である。
この場合のガス圧は500Kg／cm2より低いと透光性
が得難く、2000Kg／cm2を超えると高圧容器が困難
となるので、500−2000Kg／cm2であることが好ま
しい。 This fired body is gas pressure sintered in an argon atmosphere. For example, 1 at 500-2000Kg/ cm2 at 1200-1500℃
- Sinter for 10 hours. That is, pores in the sintered body are eliminated to promote densification. The resulting sintered body is slightly reduced and becomes black in color. In this case, if argon pressure sintering is performed without a primary sintered body, argon will enter the pores inside the sintered body, inhibiting densification and resulting in a poor sintered body. Therefore, it is necessary to perform this sintering after primary sintering in an oxygen atmosphere.
In this case, if the gas pressure is lower than 500 Kg/cm 2 , it is difficult to obtain translucency, and if it exceeds 2000 Kg/cm 2 , it becomes difficult to form a high-pressure container, so it is preferably 500-2000 Kg/cm 2 .
次に得られた焼結体を空気中あるいは酸素雰囲
気中で焼鈍する。これにより、黒色となつた焼結
体を酸化させて透明な焼結体とする。この焼鈍温
度は600−1100℃であり、10分−３時間加熱する。
焼鈍温度が低過ぎると酸化が進行せず、高過ぎる
とSr成分が蒸発して透光性が低下するので、前
記範囲であることが望ましい。 Next, the obtained sintered body is annealed in air or an oxygen atmosphere. As a result, the black sintered body is oxidized to become a transparent sintered body. The annealing temperature is 600-1100°C, and heating is performed for 10 minutes to 3 hours.
If the annealing temperature is too low, oxidation will not proceed, and if it is too high, the Sr component will evaporate and the translucency will decrease, so it is desirable that the annealing temperature be within the above range.
実施例
市販のTiCl4溶液に倍容量のイオン交換水を加
えて四塩化チタン水溶液とし、これにアンモニア
水を加えて水酸化チタンとし、これを水洗、ロ過
後濃硝酸を添加してオキシ硝酸チタンとした。こ
のオキシ硝酸チタン溶液中のTi濃度はTiO2とし
て0.0275ｇ／mlであつた。Example: Add twice the volume of ion-exchanged water to a commercially available TiCl 4 solution to make a titanium tetrachloride aqueous solution, add ammonia water to this to make titanium hydroxide, wash it with water, filter it, and add concentrated nitric acid to make titanium oxynitrate. And so. The Ti concentration in this titanium oxynitrate solution was 0.0275 g/ml as TiO 2 .
このオキシ硝酸チタン溶液60mlとTiに対して
等モル量である4.3798ｇの硝酸ストロンチウムを
イオン交換水に溶解した水溶液を混合して300ml
の混合水溶液を作つた。これにSrに対して２倍
モル量のシユウ酸をエタノール600mlに溶解した
溶液を滴下して白色沈殿を得た。この白色沈殿を
２回エタノールで洗浄後、乾燥、粉砕したものを
空気中800℃で２時間熱分解した。得られた粉末
をＸ線回折によつて調べたところSrTiO3単一相
であつた。このSrTiO3粉末を走査型電子顕微鏡
で観察したところ粒系は約0.3μmであつた。 Mix 60ml of this titanium oxynitrate solution and 300ml of an aqueous solution in which 4.3798g of strontium nitrate, which is an equimolar amount to Ti, is dissolved in ion exchange water.
A mixed aqueous solution was prepared. A solution prepared by dissolving oxalic acid in a molar amount twice that of Sr in 600 ml of ethanol was added dropwise to this to obtain a white precipitate. This white precipitate was washed twice with ethanol, dried, crushed, and thermally decomposed in air at 800°C for 2 hours. When the obtained powder was examined by X-ray diffraction, it was found to be a single phase of SrTiO 3 . When this SrTiO 3 powder was observed using a scanning electron microscope, the grain size was approximately 0.3 μm.
このSrTiO3粉末を200Kg／cm2の圧力で直径約12
mm、厚さ約５mmの円板状に一次成型した後、
2ton／cm2の静水圧化で二次成型した。 This SrTiO 3 powder was heated at a pressure of 200Kg/cm 2 to a diameter of approximately 12 mm.
mm, after primary molding into a disc shape with a thickness of about 5 mm,
Secondary molding was performed under hydrostatic pressure of 2 tons/cm 2 .
得られた成形体を酸素ガスを流しながら1300℃
で２時間、一次焼結した。次いでアルゴン雰囲気
中で1300℃、1200Kg／cm2の圧力で２時間ガス圧焼
結した。この焼結体を1000℃で２時間酸素雰囲気
中で焼鈍した。 The obtained molded body was heated at 1300℃ while flowing oxygen gas.
Primary sintering was performed for 2 hours. Then, gas pressure sintering was performed in an argon atmosphere at 1300° C. and a pressure of 1200 Kg/cm 2 for 2 hours. This sintered body was annealed at 1000°C for 2 hours in an oxygen atmosphere.
得られたものは優れた透光性のものであつた。
本実施例により得られた厚さ１mmの透光性焼結体
の入射光の波長と透過率との関係は第１図に示す
通りであつた。 The obtained product had excellent translucency.
The relationship between the wavelength of incident light and the transmittance of the transparent sintered body having a thickness of 1 mm obtained in this example was as shown in FIG.
この図面が示すように、本発明の方法で得られ
た焼結体は入射光の各波長に対し優れた透過率を
有する。 As this drawing shows, the sintered body obtained by the method of the present invention has excellent transmittance for each wavelength of incident light.
発明の効果
本発明の方法によると、
(1) 従来法では得られなかつた透光性のチタン酸
ストロンチウムの焼結体が得られる。Effects of the Invention According to the method of the present invention, (1) A translucent sintered body of strontium titanate, which could not be obtained by conventional methods, can be obtained.
(2) チタンイオンとストロンチウムイオンを含む
混合水溶液とシユウ酸のエタノール溶液とを接
触させて沈殿物を得、この沈殿物を熱分解して
原料粉末を得るので、得られる原料粉末は均一
でかつ高純度である。(2) A mixed aqueous solution containing titanium ions and strontium ions is brought into contact with an ethanol solution of oxalic acid to obtain a precipitate, and this precipitate is thermally decomposed to obtain a raw material powder, so the obtained raw material powder is uniform and High purity.
(3) 高温での焼結でないため、装置は簡単で、迅
速かつ容易に製造し得られ、従つて安価となる
等の優れた効果を奏し得られる。(3) Since sintering is not carried out at high temperatures, the device is simple, can be manufactured quickly and easily, and can therefore produce excellent effects such as being inexpensive.
第１図は本発明の透光性チタン酸ストロンチウ
ム焼結体の入射光の波長と透過率との関係図であ
る。
FIG. 1 is a diagram showing the relationship between the wavelength of incident light and the transmittance of the translucent strontium titanate sintered body of the present invention.
Claims (1)
１モル割合で含む水溶液を、シユウ酸のエタノー
ル溶液と接触させて沈殿物を生成させ、生成沈殿
物を熱分解し、成形した後、酸素あるいは空気中
で焼結し、次いでアルゴン雰囲気中でガス圧焼結
した後、空気中あるいは酸素雰囲気中で焼鈍する
ことを特徴とするチタン酸ストロンチウムの透光
性焼結体の製造法。1. An aqueous solution containing titanium ions and strontium ions in a 1:1 molar ratio is brought into contact with an ethanol solution of oxalic acid to generate a precipitate, the resulting precipitate is thermally decomposed, shaped, and then sintered in oxygen or air. 1. A method for producing a translucent sintered body of strontium titanate, which comprises sintering, gas pressure sintering in an argon atmosphere, and then annealing in air or an oxygen atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245099A JPH0292866A (en) | 1988-09-29 | 1988-09-29 | Method for manufacturing a translucent sintered body of strontium titanate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245099A JPH0292866A (en) | 1988-09-29 | 1988-09-29 | Method for manufacturing a translucent sintered body of strontium titanate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0292866A JPH0292866A (en) | 1990-04-03 |
| JPH0478580B2 true JPH0478580B2 (en) | 1992-12-11 |
Family
ID=17128596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63245099A Granted JPH0292866A (en) | 1988-09-29 | 1988-09-29 | Method for manufacturing a translucent sintered body of strontium titanate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0292866A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418919C (en) | 2000-12-20 | 2008-09-17 | 株式会社村田制作所 | Light-transmitting ceramic, its manufacturing method, and optical element |
| CN102674442A (en) * | 2012-04-28 | 2012-09-19 | 无锡隆傲电子有限公司 | Method for preparing strontium titanate nano powder through microwave hydrothermal method |
-
1988
- 1988-09-29 JP JP63245099A patent/JPH0292866A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0292866A (en) | 1990-04-03 |
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