JPH0244039A - Method for crystallizing calcium phosphate-based glass - Google Patents
Method for crystallizing calcium phosphate-based glassInfo
- Publication number
- JPH0244039A JPH0244039A JP19128188A JP19128188A JPH0244039A JP H0244039 A JPH0244039 A JP H0244039A JP 19128188 A JP19128188 A JP 19128188A JP 19128188 A JP19128188 A JP 19128188A JP H0244039 A JPH0244039 A JP H0244039A
- Authority
- JP
- Japan
- Prior art keywords
- calcium phosphate
- heat
- coating layer
- glass
- resistant material
- 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.)
- Granted
Links
- 239000011521 glass Substances 0.000 title claims abstract description 42
- 239000001506 calcium phosphate Substances 0.000 title claims abstract description 32
- 229910000389 calcium phosphate Inorganic materials 0.000 title claims abstract description 32
- 235000011010 calcium phosphates Nutrition 0.000 title claims abstract description 32
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 10
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims abstract description 21
- 238000002425 crystallisation Methods 0.000 claims abstract description 19
- 239000011247 coating layer Substances 0.000 claims abstract description 18
- 230000008025 crystallization Effects 0.000 claims abstract description 15
- 239000003779 heat-resistant material Substances 0.000 claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 6
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000007527 glass casting Methods 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000009863 impact test Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- DHAHRLDIUIPTCJ-UHFFFAOYSA-K aluminium metaphosphate Chemical compound [Al+3].[O-]P(=O)=O.[O-]P(=O)=O.[O-]P(=O)=O DHAHRLDIUIPTCJ-UHFFFAOYSA-K 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000005548 dental material Substances 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 210000000332 tooth crown Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は歯科用材料などに有用なリン酸カルシウム系ガ
ラスの成形体を結晶化して結晶化ガラスを製造する方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing crystallized glass by crystallizing a molded body of calcium phosphate glass useful for dental materials and the like.
リン酸カルシウム系結晶化ガラスは生体の骨や歯と組成
が類似しており、生体とのなじみのよさから注目されて
いる歯科用あるいは人工骨材料である。このリン酸カル
シウム系結晶化ガラスは通當原料を溶融し、ロストワッ
クス法などで鋳造してガラス鋳造体を製造した後、熱処
理により結晶化することによって製造される。Calcium phosphate-based crystallized glass has a composition similar to that of living bones and teeth, and is a dental or artificial bone material that is attracting attention because of its compatibility with living bodies. This calcium phosphate-based crystallized glass is generally produced by melting raw materials, casting by a lost wax method or the like to produce a glass casting, and then crystallizing it by heat treatment.
リン酸カルシウム系ガラスを結晶化するには鋳造成形さ
れたガラスを鋳型のま＼熱処理して結晶化させる方法と
、鋳型からガラス鋳造体を分離した後処理して結晶化さ
せる方法とがある。To crystallize calcium phosphate glass, there are two methods: heat-treating the cast glass while it is in the mold and crystallizing it, and separating the glass casting from the mold and post-processing it to crystallize it.
上記の２種の結晶化法のうち前者においては鋳型材の成
分であるＳ ｉｏ２．Ａｌ２Ｏ３，ＭｇＯ。In the former of the above two types of crystallization methods, Sio2. Al2O3, MgO.
ＺｒＯ２などがガラス鋳造体の表面に接触しているため
、その接触点の成分によって結晶核の生成状態が異なっ
たり異常な結晶核の生成や成長が起こり勝ちであった。Since ZrO2 and the like are in contact with the surface of the glass casting, the state of crystal nucleation varies depending on the components at the contact point, and abnormal crystal nucleation and growth tend to occur.
このように結晶核の生成や成長にムラがあると、リン酸
カルシウム系ガラスは表面失透機構によって結晶化が進
行するため、−旦結晶核の生成にムラが生じると結晶全
体が均一とはならず、外観的に劣ったり、内部に欠陥を
生じやすい欠点がある。If the generation and growth of crystal nuclei are uneven in this way, calcium phosphate glass will proceed with crystallization due to the surface devitrification mechanism. However, it has the disadvantage of being inferior in appearance and prone to internal defects.
また、後者においてはガラス表面の状態、即ち表面粗さ
、水分や油脂分等の吸着、付着の程度によって結晶化は
微妙に影響を受け、結果として前者はどではないにして
も不均一な結晶体となる。In addition, in the latter case, crystallization is subtly affected by the condition of the glass surface, that is, the surface roughness, the degree of adsorption and adhesion of moisture, oil, etc., and as a result, in the former case, non-uniform crystals may occur. Becomes a body.
また、ガラスの結晶化はその軟化点付近の温度領域で行
われるため、後者には軟化変形によって鋳造体が歪み易
い欠点もある。Furthermore, since glass crystallization occurs in a temperature range near its softening point, the latter also has the disadvantage that the cast body is easily distorted by softening deformation.
これらの欠点が解消されて、均一な結晶化ガラスが得ら
れ−ば高強度のリン酸カルシウム系結晶化ガラスが製造
できるのである。If these drawbacks can be eliminated and uniform crystallized glass can be obtained, high-strength calcium phosphate crystallized glass can be manufactured.
本発明者らはリン酸カルシウム系結晶化ガラスの表面が
リン酸アルミニウムと接触していると均一な結晶化ガラ
スができることを見出し本発明を完成させたものである
。すなわち、本発明はリン酸カルシウム系ガラスを結晶
化する際に成形体表面に結晶質あるいは無定形のリン酸
アルミニウムを５重量％以上含有し残部が耐熱材料また
は結晶質あるいは無定形のリン酸カルシウムを１０重量
％以上含有する耐熱材料よりなる被覆層を形成した後熱
処理して結晶化し、結晶化後コート層を除去することを
特徴とするリン酸カルシウム系ガラスの結晶化方法であ
る。この方法によれば、外観的には極めて優れており、
かつ内部欠陥のないリン酸カルシウム系結晶化ガラスが
得られるものである。The present inventors have completed the present invention by discovering that uniform crystallized glass can be produced when the surface of calcium phosphate-based crystallized glass is in contact with aluminum phosphate. That is, in the present invention, when crystallizing calcium phosphate glass, the surface of the molded product contains 5% by weight or more of crystalline or amorphous aluminum phosphate, and the remainder is a heat-resistant material or 10% by weight of crystalline or amorphous calcium phosphate. This method of crystallizing calcium phosphate glass is characterized by forming a coating layer made of the heat-resistant material containing the above, followed by crystallization by heat treatment, and removing the coating layer after crystallization. According to this method, the appearance is extremely good,
Moreover, calcium phosphate crystallized glass without internal defects can be obtained.
リン酸アルミニウム粒子がリン酸カルシウム系ガラス表
面と接触し、ガラス表面に多数の均一な結晶核を誘起す
るため結果としてガラス全体がムラ無く一定の結晶化度
合に制御することが可能となる。このリン酸アルミニウ
ム粒子の結晶核を誘起する作用は他の５ｉ０２やＡｌ２
Ｏ３などと比較して速く、リン酸アルミニウムが他の成
分と接触していても、リン酸アルミニウム粒子がある程
度以上存在すれば、その結晶核を誘起する作用は生ずる
。The aluminum phosphate particles come into contact with the surface of the calcium phosphate-based glass and induce a large number of uniform crystal nuclei on the glass surface, making it possible to uniformly control the degree of crystallinity of the entire glass. This action of inducing crystal nuclei of aluminum phosphate particles is similar to that of other 5i02 and Al2
It is faster than O3 etc., and even if aluminum phosphate is in contact with other components, if a certain amount of aluminum phosphate particles are present, the effect of inducing crystal nuclei will occur.
また、リン酸カルシウムをリン酸アルミニウムと併用す
ることにより、更にその作用を強めることができる。こ
の理由については不明な点もあるが、リン酸カルシウム
自体には均一結晶核誘起作用は見られないので、リン酸
アルミニウムの持つ均一結晶核誘起作用に対する一種の
触媒効果を持・つものと考えられる。Further, by using calcium phosphate in combination with aluminum phosphate, the effect can be further strengthened. The reason for this is unclear, but since calcium phosphate itself does not exhibit any homogeneous crystal nucleus inducing effect, it is thought to have a kind of catalytic effect on the homogeneous crystal nucleus inducing effect of aluminum phosphate.
本発明の結晶化方法において被覆に使用される材料の主
体であるリン酸アルミニウムとしてはオルトリン酸アル
ミニウム（Ａ１２０３・Ｐ２Ｏ６）あるいはメタリン酸
アルミニウム（Ａｌ２Ｏ３・３Ｐ２０＆）が使用可能で
ある。さらに成形体の結晶化温度以下でリン酸アルミニ
ウムとなる前駆体であってもよい。これらのリン酸アル
ミニウムが主体であれば、他の成分が多少大ることはさ
しつかえない。また、その結晶形態は無定形（ガラスを
含む）であっても結晶質であってもあるいはそれらの混
合物であっても構わない。その使用量は溶媒や分散剤を
除いた被覆材料全体の５重量％以上であることが必要で
ある。５重量％未満では他の耐熱材料の影響を受は結晶
核の生成が均一とならない。As the aluminum phosphate which is the main material used for the coating in the crystallization method of the present invention, aluminum orthophosphate (A1203.P2O6) or aluminum metaphosphate (Al2O3.3P20&) can be used. Furthermore, it may be a precursor that becomes aluminum phosphate at a temperature below the crystallization temperature of the molded body. As long as these aluminum phosphates are the main ingredient, it is okay for the other components to be somewhat large. Further, the crystal form may be amorphous (including glass), crystalline, or a mixture thereof. The amount used must be 5% by weight or more of the entire coating material excluding solvents and dispersants. If the amount is less than 5% by weight, the formation of crystal nuclei will not be uniform due to the influence of other heat-resistant materials.
本発明の結晶化方法に使用される被覆剤の残部の耐熱材
料は結晶化する温度で軟化や熔融せず、しかも成形体材
料と反応などの悪影響を与えないものであればよく、シ
リカ、アルミナ、シルコニ“ｒ１チタニアなどの耐火材
料やその他のガラス、セラミックスなどが使用可能であ
る。特にその耐熱材料の一部をリン酸カルシウムとする
ことにより、既述したようにその作用を一層高めること
ができる。このリン酸カルシウムも各種のものが使用で
き、Ｃａ０−Ｐ２０ａ、２ＣａＣＩＰ２０５゜３ＣａＯ
−Ｐ２０ｓあるいは４Ｃａ０・３Ｐ２０５など、あるい
はそれらの混合物であって、これ以外の成分が多少混入
することは構わない。この場合も結晶形態は無定形であ
っても結晶質であってもあるいはそれらの混合物であっ
てもよい。リン酸カルシウムを使用する場合には耐熱材
料中の１０重量％以上ないとリン酸カルシウムの効果が
発揮されにくい。The remaining heat-resistant material of the coating material used in the crystallization method of the present invention may be any material that does not soften or melt at the crystallization temperature and does not have any adverse effects such as reaction with the molded body material, such as silica, alumina, etc. Refractory materials such as , silconi "r1 titania", other glasses, ceramics, etc. can be used. In particular, by using calcium phosphate as a part of the heat-resistant material, the effect can be further enhanced as described above. Various types of calcium phosphate can be used, including Ca0-P20a, 2CaCIP205゜3CaO
-P20s, 4Ca0.3P205, etc., or a mixture thereof, and it does not matter if some other components are mixed in. In this case as well, the crystal form may be amorphous, crystalline, or a mixture thereof. When using calcium phosphate, the effect of calcium phosphate is difficult to exhibit unless the amount is 10% by weight or more in the heat-resistant material.
この被覆材の粒度は１圓μｍ以下が好ましい。The particle size of this coating material is preferably 1 μm or less.
大きい粒子が入ると被覆材とガラス体との微細な接触が
悪（なり、本発明の効果が発揮できず好ましくない。If large particles enter, the fine contact between the coating material and the glass body will be poor, and the effects of the present invention will not be exerted, which is not preferable.
本発明の結晶化方法は次の通りである。まずリン酸アル
ミニウムと耐熱材料を選び適当な溶媒、例えば水、メタ
ノール、エタノールなどのアルコール類、エーテル類、
グリコール類などに溶解あるいはＢ濁させる。濃度は後
の塗布などができればよく、特に規定しない。水中に懸
濁あるいはベースト状とするのが一般的で最適である。The crystallization method of the present invention is as follows. First, select aluminum phosphate and a heat-resistant material and use a suitable solvent, such as water, alcohols such as methanol and ethanol, ethers, etc.
Dissolve or make cloudy in glycols, etc. The concentration is not particularly specified as long as it can be applied later. It is generally best to suspend it in water or form a base.
この液を鋳造、焼結など適当な方法で成形した、通常は
ロストワックス法により鋳造成形した、ガラス体の全表
面にハケ塗りやスプレーなどの方法により塗布し、常温
あるいは加熱により乾燥させる。被覆層の厚みは特に制
限はないが、通常数μｍ〜数ｍｍである。こうして被覆
層が形成されたガラス体を通常の方法で熱処理して結晶
化させる。結晶化が完成した後、被覆層を軽いブラスト
あるいは希酸で処理して剥離除去する。リン酸アルミニ
ウムはこの操作で完全に剥離できる。This liquid is applied by brushing, spraying, etc. to the entire surface of a glass body that has been molded by an appropriate method such as casting or sintering, usually by the lost wax method, and then dried at room temperature or by heating. The thickness of the coating layer is not particularly limited, but is usually several μm to several mm. The glass body on which the coating layer has been formed in this manner is heat-treated in a conventional manner to crystallize it. After crystallization is complete, the coating layer is stripped off by light blasting or treatment with dilute acid. Aluminum phosphate can be completely removed by this operation.
実施例 １
リン酸カルシウム系ガラス（Ｃａ Ｏ３８，５ｍｏｌχ
。Example 1 Calcium phosphate glass (CaO38,5molχ
.
Ｐ ２０ ｓ ４８．１ｍｏｌχ１Ａ１２０３ ９．
１ｍｏ１２：、 Ｌ ｉ ２０４．３ｍｏｌＸ ）を
ロストワックス法により歯冠形状に鋳造した。鋳型から
ガラスを分離した後、その表面に粒径１〜６８μｍのリ
ン酸アルミニウム粉末（結晶質７０重量％）に水を加え
てペースト状としたものをハケ塗りした。その後アルミ
ナ中に包埋して６５０℃で１０ｈｒ熱処理して結晶化し
た。結晶化終了後ｌＮ−ＨＣｌで洗浄すると被覆層は完
全に除去できた。P 20 s 48.1 mol χ1A1203 9.
1mol12:, Li 204.3molX) was cast into the shape of a tooth crown by the lost wax method. After the glass was separated from the mold, a paste made by adding water to aluminum phosphate powder (crystalline 70% by weight) with a particle size of 1 to 68 μm was applied to the surface with a brush. Thereafter, it was embedded in alumina and heat-treated at 650° C. for 10 hours to crystallize it. After the crystallization was completed, the coating layer could be completely removed by washing with 1N-HCl.
調製した結晶化ガラスは半透明の象牙色で外観も内部に
も欠陥は見られなかった。１ｍ上から鉄板上に落下させ
る衝撃試験でも壊れなかった。The prepared crystallized glass was translucent and ivory-colored, and no defects were observed either externally or internally. It did not break even in an impact test where it was dropped from 1 meter onto a steel plate.
実施例 ２
被覆層材料としてリン酸アルミニウム（結晶質７０重量
％）６５重量％、アルミナ２５重量％、シリカ１０重量
％で構成される粒径１〜６８μｍの粉末を使用した以外
は実施例１と同様に処理してリン酸カルシウム系結晶化
ガラスを得た。結晶化後の被覆層の除去にはブラストを
用いた。Example 2 Same as Example 1 except that a powder with a particle size of 1 to 68 μm composed of 65% by weight of aluminum phosphate (70% by weight of crystalline), 25% by weight of alumina, and 10% by weight of silica was used as the coating layer material. A calcium phosphate crystallized glass was obtained by the same treatment. Blasting was used to remove the coating layer after crystallization.
この結晶化ガラスも半透明の象牙色で外観も内部にも欠
陥は見られず、衝撃試験もクリアした。This crystallized glass was also translucent and ivory in color, with no defects found on the outside or inside, and passed the impact test.
比較例 １
実施例１で得られた歯冠形状のリン酸カルシウム系ガラ
スを鋳型（Ｓｉ０２９０重量％、Ｍｇ０５重量％、その
他 ５重量％）のま−６５０°Ｃで１０ｈｒ熱処理した
。Comparative Example 1 The crown-shaped calcium phosphate glass obtained in Example 1 was heat-treated in a mold (90% by weight of Si0, 5% by weight of Mg, and 5% by weight of others) at -650°C for 10 hours.
得られた結晶化ガラスは不透明の白色で審美性が悪（、
中心部には微細な気孔が生成していた。The obtained crystallized glass was opaque white and had poor aesthetics (,
Fine pores were formed in the center.
そのためか落下試験では破壊してしまった。Perhaps because of this, it was destroyed in the drop test.
比較例 ２
粒径１〜６８μｍのアルミナ粉末を水でペーストとした
ものを用いた以外は実施例１と同様に処理してリン酸カ
ルシウム系結晶化ガラスを得た。Comparative Example 2 A calcium phosphate crystallized glass was obtained in the same manner as in Example 1, except that alumina powder with a particle size of 1 to 68 μm was made into a paste with water.
得られた結晶化ガラスはいずれも半透明の象牙色中に白
色不透明部分の混った外観で、中心部には微細な気孔が
生成しており、落下試験により破壊した。All of the obtained crystallized glasses had an appearance of a translucent ivory color mixed with white opaque parts, fine pores were formed in the center, and they were destroyed in a drop test.
本発明のリン酸アルミニウムを含む被覆層を形成して結
晶化すると均一な結晶となるため、実施例に見られるよ
うに審美性に優れて、内部欠陥もなく、強度的にも優れ
た結晶化ガラスを得ることができた。When a coating layer containing aluminum phosphate of the present invention is formed and crystallized, it becomes a uniform crystal, so as seen in the examples, crystallization with excellent aesthetics, no internal defects, and excellent strength. I was able to get the glass.
しかし、ガラス鋳造体を鋳型のまＸ結晶化（比較例１）
したり、リン酸アルミニウムを含まない被覆層で結晶化
（比較例２）すると、均一な結晶化の生成と成長が行わ
れないため、内部に気泡が生成し、そのため外観も悪く
、強度も低下してしまうのである。However, the glass casting was crystallized in the mold (Comparative Example 1).
However, if crystallization is performed with a coating layer that does not contain aluminum phosphate (Comparative Example 2), uniform crystallization and growth will not occur, resulting in the formation of air bubbles inside, resulting in poor appearance and reduced strength. I end up doing it.
Claims (2)
体表面に結晶質あるいは無定形のリン酸アルミニウムを
５重量％以上含有し残部が耐熱材料よりなる被覆層を形
成した後熱処理して結晶化し、結晶化後コート層を除去
することを特徴とするリン酸カルシウム系ガラスの結晶
化方法。(1) When crystallizing calcium phosphate-based glass, a coating layer containing 5% by weight or more of crystalline or amorphous aluminum phosphate, with the remainder made of a heat-resistant material, is formed on the surface of the molded product, and then heat-treated and crystallized, A method for crystallizing calcium phosphate glass, which comprises removing a coating layer after crystallization.
ウムを１０重量％以上含有することを特徴とする特許請
求の範囲第１項記載のリン酸カルシウム系ガラス結晶化
方法。(2) The method for crystallizing calcium phosphate-based glass according to claim 1, wherein the heat-resistant material contains 10% by weight or more of crystalline or amorphous calcium phosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191281A JP2725028B2 (en) | 1988-07-30 | 1988-07-30 | Crystallization method of calcium phosphate glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191281A JP2725028B2 (en) | 1988-07-30 | 1988-07-30 | Crystallization method of calcium phosphate glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0244039A true JPH0244039A (en) | 1990-02-14 |
| JP2725028B2 JP2725028B2 (en) | 1998-03-09 |
Family
ID=16271950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63191281A Expired - Fee Related JP2725028B2 (en) | 1988-07-30 | 1988-07-30 | Crystallization method of calcium phosphate glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2725028B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6287427A (en) * | 1985-10-11 | 1987-04-21 | Asahi Glass Co Ltd | Mold material |
-
1988
- 1988-07-30 JP JP63191281A patent/JP2725028B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6287427A (en) * | 1985-10-11 | 1987-04-21 | Asahi Glass Co Ltd | Mold material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2725028B2 (en) | 1998-03-09 |
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