JP5249091B2 - 歯科用窯 - Google Patents
歯科用窯 Download PDFInfo
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- JP5249091B2 JP5249091B2 JP2009052728A JP2009052728A JP5249091B2 JP 5249091 B2 JP5249091 B2 JP 5249091B2 JP 2009052728 A JP2009052728 A JP 2009052728A JP 2009052728 A JP2009052728 A JP 2009052728A JP 5249091 B2 JP5249091 B2 JP 5249091B2
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- 238000010438 heat treatment Methods 0.000 claims description 130
- 238000002485 combustion reaction Methods 0.000 claims description 44
- 238000001816 cooling Methods 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 38
- 238000005245 sintering Methods 0.000 claims description 33
- 239000005548 dental material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000002596 correlated effect Effects 0.000 claims description 2
- 239000011224 oxide ceramic Substances 0.000 claims description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 4
- 239000002671 adjuvant Substances 0.000 claims 1
- 238000009423 ventilation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000011351 dental ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009699 high-speed sintering Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/20—Methods or devices for soldering, casting, moulding or melting
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/486—Fine ceramics
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
- F27B17/025—Furnaces of a kind not covered by any preceding group specially designed for laboratory use for dental workpieces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/02—Ohmic resistance heating
- F27D11/04—Ohmic resistance heating with direct passage of current through the material being heated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/007—Cooling of charges therein
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
- F27D2019/0037—Quantity of electric current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0056—Regulation involving cooling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Dentistry (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Clinical Laboratory Science (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Dental Prosthetics (AREA)
- Dental Preparations (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Description
12 窯フード
14 回転関節部材
16 窯基礎部材
18 載置面
20 燃焼室
22 発熱体
28 中空室
30 断熱層
40 第1昇温期間
42 中間加熱期間
44 最終昇温期間
46 保持時間
48 第1冷却期間
50 最終冷却期間
Claims (25)
- 加熱室が加熱手段によって第1の昇温期間中に50°K/分超の第1の昇温速度をもって加熱され、それによって窯を少なくとも1000℃超に昇温する歯科用窯であり、
前記第1の昇温期間に対して少なくとも5分の長さの中間加熱期間が後続しその勾配あるいは昇温速度を燃焼窯(10)内で焼結される材料に応じて調節し、
その後に30°K/分超の昇温速度で加熱する最終昇温期間(44)が続き、その最終昇温期間(44)の間に少なくとも5分間窯温度が前記第1の昇温期間の終端の温度より高くに保持され、
それに続いて制御手段によって窯(10)の強制冷却が実施され、
その際歯科用窯の第1の昇温速度がその歯科用窯の断熱材の極めて小さな熱容量および歯科用窯の発熱体と加熱室の間の極めて小さな熱容量によって達成されることを特徴とする歯科用窯。 - 中間加熱期間が少なくとも10分の長さであることを特徴とする請求項1記載の歯科用窯。
- 最終昇温期間(44)に50°K/分超の昇温速度で加熱することを特徴とする請求項1または2記載の歯科用窯。
- 最終昇温期間(44)の間に少なくとも25分間窯温度が第1の昇温期間の終端の温度より高くに保持されることを特徴とする請求項1ないし3のいずれかに記載の歯科用窯。
- 焼結される焼結材料が加熱手段によって第1の昇温期間中に50°K/分超の予加熱率で予加熱される歯科用窯であり、
第1の昇温期間の終端と最終加熱期間の開始の間に50°K/分よりも顕著に低い加熱率を有する中間加熱期間が存在し、また前記第1の昇温期間と最終加熱期間は材料と無関係に設定され、前記中間加熱期間はその長さおよび加熱率の点に関して焼結される材料に依存して決定され、
その際歯科用窯の第1の昇温速度がその歯科用窯の断熱材の極めて小さな熱容量および歯科用窯の発熱体と加熱室の間の極めて小さな熱容量によって達成されることを特徴とする歯科用窯。 - 中間加熱期間が10°K/分未満の加熱率を有することを特徴とする請求項5記載の歯科用窯。
- 加熱室(20)内の最大温度は約1600℃となり、窯(10)が室温を起点にしてその加熱室(20)内で30分未満の間に1600℃まで加熱可能であることを特徴とする請求項1ないし6のいずれかに記載の歯科用窯。
- 中間昇温速度は略10の累乗で第1の昇温速度よりも低くなることを特徴とする請求項1ないし7のいずれかに記載の歯科用窯。
- 中間昇温速度は10ないし50の係数で第1の昇温速度よりも低くなることを特徴とする請求項8記載の歯科用窯。
- 窯(10)の加熱室(20)が耐熱性の絶縁材、特に繊維から形成されたプレス成形材によって被包されていて、その壁厚が15ないし25mmとなることを特徴とする請求項1ないし9のいずれかに記載の歯科用窯。
- 耐熱性の絶縁材が繊維であることを特徴とする請求項10記載の歯科用窯。
- 中間加熱期間は温度および/または時間に関して焼結される歯科材料の焼結工程のうちで温度/時間に相関する焼結速度が最大となる中間段階を包合するように選択されることを特徴とする請求項1ないし6のいずれかに記載の歯科用窯。
- 燃焼される歯科材料が予焼結および/または予硬化され、実質的な焼結の前に焼結材料の最終硬度に比べて顕著に低い硬度を有していることを特徴とする請求項1ないし12のいずれかに記載の歯科用窯。
- 燃焼される歯科材料が予焼結および/または予硬化され、実質的な焼結の前に焼結材料の最終硬度に比べて半分未満である硬度を有していることを特徴とする請求項13記載の歯科用窯。
- 第1の昇温速度は第1の昇温期間(40)から中間加熱期間への移行に際してオーバシュートは発生しないが少なくとも50°K/分となるような最大昇温速度に相当するように選択されることを特徴とする請求項1ないし14のいずれかに記載の歯科用窯。
- 保持期間(46)の終了後に第1の昇温期間(40)の昇温速度より低く中間加熱期間の昇温速度よりは高い第1の冷却速度によって窯(10)が冷却され、その後により高い第2の冷却速度が設定されることを特徴とする請求項1ないし15のいずれかに記載の歯科用窯。
- 歯科用窯をマイクロ波オーブンとすることを特徴とする請求項1ないし16のいずれかに記載の歯科用窯。
- 加熱室(20)が第1の昇温期間中に50°K/分超の第1の昇温速度をもって予加熱され、それによって窯を少なくとも1000℃に予加熱する方法であり、
前記第1の昇温期間に対して少なくとも5分、特に少なくとも10分の長さの中間加熱期間が後続しその勾配あるいは昇温速度を窯(10)の焼結材料に応じて調節し、
その後に20°K/分超、特に約50°K/分の昇温速度で加熱する最終昇温期間(44)が続き、
その間に少なくとも5分間、特に25分間窯温度が前記第1の昇温期間の終端の温度より高くに保持され、
それに続いて窯(10)の強制冷却が実施され、
加熱室(20)の温度が1100℃超にある時間間隔が全燃焼サイクル時間の少なくとも68%となり、その際前記全燃焼サイクル時間を室温からの昇温の開始から再び室温までの冷却の間の時間間隔とすることを特徴とする方法。 - 加熱室(20)の温度が1100℃超にある時間間隔が全燃焼サイクル時間の少なくとも80%であることを特徴とする請求項18記載の方法。
- 焼結される焼結材料が第1の昇温期間中に50°K/分超の昇温速度で予加熱される方法であり、第1の昇温期間の終端と最終加熱期間の開始の間に50°K/分よりも顕著に低く、特に10°K/分未満である昇温速度で予加熱する中間加熱期間が存在し、また前記第1の昇温期間と最終加熱期間は対象物と無関係に設定済みであるかあるいは設定されるものとし、前記中間加熱期間はその長さおよび昇温速度の点に関して焼結される材料に依存して決定され、
加熱室(20)の温度が1100℃超にある時間間隔が全燃焼サイクル時間の少なくとも68%となり、その際前記全燃焼サイクル時間を室温からの昇温の開始から再び室温までの冷却の間の時間間隔とすることを特徴とする方法。 - 加熱室(20)の温度が1100℃超にある時間間隔が全燃焼サイクル時間の少なくとも80%であることを特徴とする請求項20記載の方法。
- 歯科補綴材料を乾式あるいは湿式焼結によって焼結する方法であって、焼結材料がZrO2、Al2O3、およびそれらの化合物から形成されまたドーピング補助剤を有する酸化セラミックを含むことを特徴とする請求項18ないし21記載の方法。
- 保持時間(46)の終了と共に開始して窯(10)の強制冷却が実施され、それによって60分未満の間に取り出し温度までの歯科補綴材料の冷却が達成されることを特徴とする請求項18ないし22のいずれかに記載の歯科用窯。
- 保持時間(46)の終了と共に開始して窯(10)の強制冷却が実施され、20ないし60分の間に取り出し温度までの歯科補綴材料の冷却が達成されることを特徴とする請求項23記載の歯科用窯。
- 取り出し温度が約400℃であることを特徴とする請求項23または24記載の歯科用窯。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008012578.4 | 2008-03-05 | ||
DE102008012578.4A DE102008012578C5 (de) | 2008-03-05 | 2008-03-05 | Dentalofen |
Publications (2)
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JP2009207901A JP2009207901A (ja) | 2009-09-17 |
JP5249091B2 true JP5249091B2 (ja) | 2013-07-31 |
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JP2009052728A Active JP5249091B2 (ja) | 2008-03-05 | 2009-03-05 | 歯科用窯 |
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US (2) | US9033703B2 (ja) |
EP (1) | EP2098188B1 (ja) |
JP (1) | JP5249091B2 (ja) |
DE (1) | DE102008012578C5 (ja) |
ES (1) | ES2895516T3 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101785608B1 (ko) * | 2016-08-18 | 2017-10-17 | 이수영 | 치과용 소결장치의 온도 제어 장치 및 방법 |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008012578C5 (de) * | 2008-03-05 | 2022-04-07 | Ivoclar Vivadent Ag | Dentalofen |
DE102009051157B4 (de) * | 2009-10-29 | 2011-09-22 | Benteler Automobiltechnik Gmbh | Kammerofen mit Übertemperatur |
US8487220B2 (en) | 2009-11-18 | 2013-07-16 | Daniel F. Serrago | Vacuum oven |
EP2452651A1 (de) * | 2010-11-15 | 2012-05-16 | Ivoclar Vivadent AG | Dentalofen mit Suszeptor-Behälter |
EP2495520B1 (de) * | 2011-03-02 | 2014-12-10 | Ivoclar Vivadent AG | Dentalbrenn- oder -pressofen |
US9759487B2 (en) | 2011-03-02 | 2017-09-12 | Ivoclar Vivadent Ag | Dental firing or press furnace |
EP2550928B1 (de) * | 2011-07-25 | 2017-03-01 | Ivoclar Vivadent AG | Dentalofen mit einemTrocknungssensor |
US10111282B2 (en) | 2011-07-25 | 2018-10-23 | Ivoclar Vivadent Ag | Dental furnace |
DE102011056211B3 (de) * | 2011-12-09 | 2013-02-07 | Degudent Gmbh | Verfahren und Vorrichtung zum Sintern von Sintergut |
EP2754409B1 (de) * | 2013-01-15 | 2020-12-16 | Ivoclar Vivadent AG | Dentalofen |
EP2792985B1 (de) * | 2013-04-18 | 2014-11-26 | Amann Girrbach AG | Sintervorrichtung |
EP2792332B1 (de) | 2013-04-18 | 2015-03-11 | Amann Girrbach AG | Anordnung mit zumindest einem zu sinternden Werkstück |
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US9033703B2 (en) | 2015-05-19 |
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