JPS59102837A - Alkali-resistant molded article of fused quartz and its manufacture - Google Patents
Alkali-resistant molded article of fused quartz and its manufactureInfo
- Publication number
- JPS59102837A JPS59102837A JP20773982A JP20773982A JPS59102837A JP S59102837 A JPS59102837 A JP S59102837A JP 20773982 A JP20773982 A JP 20773982A JP 20773982 A JP20773982 A JP 20773982A JP S59102837 A JPS59102837 A JP S59102837A
- Authority
- JP
- Japan
- Prior art keywords
- alkali
- molded body
- molded article
- resistant
- colloidal 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.)
- Pending
Links
Landscapes
- Glass Melting And Manufacturing (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は耐アルカリ性溶融石実質成形体及びその製造方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alkali-resistant fused stone substantial molded body and a method for producing the same.
溶融石英質成形体は各種の特性を有している。例えば、
熱膨張係数が小さいこと、耐熱衝撃性に優れていること
、熱伝導度が低いことなどの特性を有している。このた
め、従来から溶融孔実質成形体は各種工業に使用されて
きた。Fused silica molded bodies have various characteristics. for example,
It has characteristics such as a small coefficient of thermal expansion, excellent thermal shock resistance, and low thermal conductivity. For this reason, molten hole substantially molded bodies have been used in various industries.
しかし、従来の溶融孔実質成形体は４〜２０％の気孔率
を有するため、Ｎａ２Ｏやに２０等のアルカリが気孔に
入って浸蝕され易かった。このため、従来の溶融孔実質
成形体をアルカリ条件下で使用した場合、浸蝕され、高
温下では急速に失透が起こり、寿命が°短かった。アル
カリ溶液の溶融孔実質成形体に対する浸蝕は、成形体表
面から網目構造の崩壊を伴いつつ起こるといわれている
。However, since the conventional melt-pored substantially molded body has a porosity of 4 to 20%, alkali such as Na2O or 20, etc. enters the pores and is easily corroded. For this reason, when conventional melt-pored solid molded bodies were used under alkaline conditions, they were eroded, rapidly devitrified at high temperatures, and had a short lifespan. It is said that the attack of the alkaline solution on the molten porous molded body occurs accompanied by the collapse of the network structure from the surface of the molded body.
そこで、従来からアルカリの侵入を防ぐために緻密な溶
融孔実質成形体を作ったり、溶融孔実質成形体の表面を
グレージングしたりした。しかし、サーマルショックに
対して弱くあまり良い結果が得られなかった。Therefore, conventionally, in order to prevent the intrusion of alkali, dense molten porosity molded bodies have been made, or the surface of the molten porosity molded bodies has been glazed. However, it was weak against thermal shock and did not give very good results.
本発明は上記の実情に鑑みてなされたちので、アルカリ
条件下でも浸蝕されにくく、クラックや失透等の生じに
くい耐アルカリ性溶融石実質成形体及びその製造方法を
提供することを目的とする。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an alkali-resistant molten stone substantial molded body that is resistant to corrosion even under alkaline conditions and is resistant to cracking, devitrification, etc., and a method for producing the same.
本弁明の耐アルカリ性溶融石実質成形体は溶融石英質成
形体にＺｒ ０ｒＳｉ ０２非晶質をコーティングした
ことを特徴とするものである。The alkali-resistant fused stone substance molded body of the present invention is characterized in that the fused silica molded body is coated with Zr 0rSi 02 amorphous material.
また、本発明の耐アルカリ性溶融石実質成形体は、加水
分解可能なジルコニウム化合物（Ｚｒ化合物）とシリコ
ン化合物（Ｓｉ化合物）の混合溶液を加水分解すること
ににっで超微粒子のＺｒ ０ｒＳｉ ０２非晶質の分散
したコロイド溶液を調整し、前記コロイド溶液を用いて
溶融石英質成形体にコーティングして製造される。In addition, the alkali-resistant molten stone substance molded body of the present invention contains ultrafine particles of Zr 0rSi 02 non-aluminum by hydrolyzing a mixed solution of a hydrolyzable zirconium compound (Zr compound) and a silicon compound (Si compound). It is manufactured by preparing a colloidal solution in which crystalline particles are dispersed, and coating a fused silica molded body with the colloidal solution.
以上のように０、本発明の耐アルカリ性溶融石実質成形
体は緻密なＺｒＯ２−８ｉ ０２非晶質がコーティング
されているので、アルカリに対して大変強い。また、Ｚ
ｒ ０ｒＳｉ ０２非晶質のコーティング層はα−クリ
ストバライトの発生を防止するので失透に対しても大変
強い。As described above, since the alkali-resistant molten stone substantial molded body of the present invention is coated with dense ZrO2-8i02 amorphous material, it is very resistant to alkalis. Also, Z
The r 0rSi 02 amorphous coating layer prevents the generation of α-cristobalite and is therefore very resistant to devitrification.
本発明の耐アルカリ性溶融石実質成形体は、以上のよう
な効果を有しているので、例えばガラス工業用耐火物、
ケイ光体焼成ルツボ等に使用することができる。Since the alkali-resistant molten stone substantial molded body of the present invention has the above-mentioned effects, it can be used, for example, as a refractory for the glass industry,
It can be used for phosphor firing crucibles, etc.
第１図及び第２図を参照して本発明の好適な実施例につ
いて説明する。A preferred embodiment of the present invention will be described with reference to FIGS. 1 and 2.
溶融石実質成−形体１は４〜２０％の気孔率を有してい
る。従って、溶融石英質成形体１をＺｒ ０ｒＳｉ ０
２非晶質の分散したコロイド溶液に浸すと気孔２の中に
コロイド溶液が侵入する。その結果、Ｚｒ ０ｒＳｉ
０２非晶質が気孔２の中に入り込むのである。こうして
溶融石英質成形体１表面にＺｒ０ｒＳｉＯ２非晶質のコ
ーティング層３が形成される（第１図）。The fused stone substantial molded body 1 has a porosity of 4 to 20%. Therefore, the fused silica molded body 1 is Zr 0rSi 0
2 When immersed in an amorphous dispersed colloidal solution, the colloidal solution invades into the pores 2. As a result, Zr0rSi
02 amorphous material enters into the pores 2. In this way, a Zr0rSiO2 amorphous coating layer 3 is formed on the surface of the fused silica molded body 1 (FIG. 1).
本発明の耐アルカリ性溶融石実質成形体は、材質を緻密
にして気孔率を減少させるとともに、シリカ分子間にケ
イ素イオン４（Ｓｔ”）よりも大きなイオン５を入れる
ことにより耐アルカリ性を高めているのである（第２図
）。The alkali-resistant molten stone substance molded body of the present invention has improved alkali resistance by making the material dense to reduce porosity and by introducing ions 5 larger than silicon ions 4 (St") between silica molecules. (Figure 2).
本発明の耐アルカリ性溶融石実質成形体においては、Ｚ
ｒ ０２ ／Ｓｉ ０２の重量比が１１５以下であるこ
とが好ましい。ＺｒＯ２／ＳｉＯ２が１１５より大きい
と高温でクラックが入る恐れがある。In the alkali-resistant fused stone substantial molded body of the present invention, Z
It is preferable that the weight ratio of r 02 /Si 02 is 115 or less. If ZrO2/SiO2 is greater than 115, cracks may occur at high temperatures.
以下、実施例を掲げて本発明をより具体的に説明する。Hereinafter, the present invention will be described in more detail with reference to Examples.
友１に
出発材料としてＳｉ （０−Ｃ２Ｈｓ ）４と７ｒ
（０−Ｃ３Ｈ７）４ ・２０３Ｈｙ ＯＨを使用した。Si (0-C2Hs)4 and 7r as starting materials for friend 1
(0-C3H7)4.203HyOH was used.
Ｓｉ （０−Ｃ２Ｈｓ ）４とＺｒ（０−Ｃ３Ｈ７）
４ ・２Ｃ３Ｈ７０ＨのＣ２Ｈ５０Ｈ−Ｈ２０溶液に塩
［’加え、５０℃で３０時間撹拌して調整しｌ〔コロイ
ド溶液の中に、溶融石英質成形体を浸して１０時間後取
り出した。そして、研磨後８００ ’Ｃ：で２時間加熱
した。Si(0-C2Hs)4 and Zr(0-C3H7)
A salt [' was added to a C2H50H-H20 solution of 4.2C3H70H, and the mixture was stirred at 50°C for 30 hours to adjust the temperature.The fused silica molded body was immersed in the colloidal solution and taken out after 10 hours. After polishing, it was heated at 800'C for 2 hours.
このようにして製造された本発明の耐アルカリ性溶融石
実質成形体について、次の条件でアルカリに対する耐浸
触性試験を行った。The alkali-resistant molten stone substantial molded body of the present invention thus produced was subjected to an alkali penetration resistance test under the following conditions.
３規定のＮａ ＯＨ溶液中に本発明の耐アルカリ性溶融
石実質成形体と、未コーティングの溶融石英質成形体を
入れて８０℃に保ち、経過時間に対する浸蝕層の深さを
測定した。The alkali-resistant fused stone substance molded body of the present invention and the uncoated fused silica molded body were placed in a 3N NaOH solution and kept at 80° C., and the depth of the eroded layer was measured with respect to the elapsed time.
その結果を第３図に示す。The results are shown in FIG.
第３図かられかるように、本発明の耐アルカリ性溶融石
実質成形体は未コーティングの溶融石英質成形体に比べ
て４倍の耐浸触性を示した。しかし、本発明の耐アルカ
リ性溶融石実質成形体は、浸蝕層の深さが３０μを越え
ると急激に浸蝕スピードが増した。これはコーティング
層の厚さに関係があると思われる。As can be seen from FIG. 3, the alkali-resistant fused silica substance molded body of the present invention exhibited four times the penetration resistance as compared to the uncoated fused silica molded body. However, in the alkali-resistant molten stone substantive molded body of the present invention, the erosion speed rapidly increased when the depth of the eroded layer exceeded 30 μm. This seems to be related to the thickness of the coating layer.
次に本発明の耐アルカリ性溶融石実質成形体と未コーテ
ィングの溶融石英質成形体について失透試験を行った。Next, a devitrification test was conducted on the alkali-resistant fused quartz substance molded body of the present invention and the uncoated fused silica molded body.
失透試験は１２５０℃の空気中で行い、α−クリストバ
ライトの量を測定した。その結果を第４図に示す。The devitrification test was conducted in air at 1250°C, and the amount of α-cristobalite was measured. The results are shown in FIG.
この失透試験により、未コーティングの溶融孔実質成形
体に比較して、本発明の耐アルカリ性溶融石実質成形体
は優れた耐失透性を右することがわかった。This devitrification test revealed that the alkali-resistant molten stone substance molded body of the present invention has superior devitrification resistance compared to the uncoated molten pore substance molded body.
第１図は本発明の耐アルカリ性溶融石実質成形体表面の
一例を示す部分断面図、第２図は本発明の耐アルカリ性
溶融石実質成形体でのシリカ分子とジルコニウムイオン
の関係を示す説明図、第３図・は本発明の耐アルカリ性
溶融石実質成形体と未コーティングの溶融石英質成形体
の耐蝕性試験の結果を示すグラフ、第４図は本発明の耐
アルカリ性溶融石ＩＡ質成形体と未コーティングの溶融
孔実質成形体の失透試験の結果を示すグラフである。
１・・・溶融孔実質成形体
壷
２・・・気孔
３・・・ＺｒＯ２−８ｉＯ２非晶質のコーティング層FIG. 1 is a partial sectional view showing an example of the surface of the alkali-resistant molten stone substance formed body of the present invention, and FIG. 2 is an explanatory diagram showing the relationship between silica molecules and zirconium ions in the alkali-resistant molten stone substance formed body of the present invention. , FIG. 3 is a graph showing the results of a corrosion resistance test of the alkali-resistant molten stone substantial molded body of the present invention and the uncoated fused silica molded body, and FIG. 4 is a graph showing the results of the corrosion resistance test of the alkali-resistant fused stone IA molded body of the present invention. FIG. 3 is a graph showing the results of a devitrification test of an uncoated melt-pore substance molded body. 1... Melt pore substantially molded body pot 2... Pore 3... ZrO2-8iO2 amorphous coating layer
Claims (2)
をコーティングしたことを特徴とする耐アルカリ性溶融
石実質成形体。(1) An alkali-resistant molten stone substance molded body, characterized in that the molten hole substance molded body is coated with Zr 0rSi 02 amorphous material.
）とシリコン化合物（Ｓｉ化合物）の混合溶液を加水分
解することによって超微粒子のＺｒ ０２−８ｉ ０２
非晶質の分散したコロイド溶液を調整し、前記コロイド
溶液を用いて溶融孔実質成形体にコーティングすること
を特徴とする耐アルカリ性溶融石実質成形体の製造方法
。(2) Ultrafine particles of Zr 02-8i 02 are produced by hydrolyzing a mixed solution of a hydrolyzable zirconium compound (Zr compound) and a silicon compound (Si compound).
1. A method for producing an alkali-resistant molten stone substance formed body, which comprises preparing an amorphous dispersed colloidal solution and coating a molten pore substance formed body with the colloidal solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20773982A JPS59102837A (en) | 1982-11-29 | 1982-11-29 | Alkali-resistant molded article of fused quartz and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20773982A JPS59102837A (en) | 1982-11-29 | 1982-11-29 | Alkali-resistant molded article of fused quartz and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59102837A true JPS59102837A (en) | 1984-06-14 |
Family
ID=16544731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20773982A Pending JPS59102837A (en) | 1982-11-29 | 1982-11-29 | Alkali-resistant molded article of fused quartz and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59102837A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1506145A1 (en) * | 2002-05-23 | 2005-02-16 | Saint-Gobain Ceramics and Plastics, Inc. | Zircon/zirconia mix for refractory coatings and inks |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138512A (en) * | 1976-05-14 | 1977-11-18 | Kogyo Gijutsuin | Glass having excellent alkali resistance and production thereof |
| JPS57100943A (en) * | 1980-12-10 | 1982-06-23 | Asahi Glass Co Ltd | Substrate coated with silicon oxide having excellent durability |
-
1982
- 1982-11-29 JP JP20773982A patent/JPS59102837A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138512A (en) * | 1976-05-14 | 1977-11-18 | Kogyo Gijutsuin | Glass having excellent alkali resistance and production thereof |
| JPS57100943A (en) * | 1980-12-10 | 1982-06-23 | Asahi Glass Co Ltd | Substrate coated with silicon oxide having excellent durability |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1506145A1 (en) * | 2002-05-23 | 2005-02-16 | Saint-Gobain Ceramics and Plastics, Inc. | Zircon/zirconia mix for refractory coatings and inks |
| US7026039B2 (en) * | 2002-05-23 | 2006-04-11 | Saint-Gobain Ceramics & Plastics, Inc. | Zircon/zirconia mix for refractory coatings and inks |
| EP1506145A4 (en) * | 2002-05-23 | 2007-11-28 | Saint Gobain Ceramics | Zircon/zirconia mix for refractory coatings and inks |
| USRE40301E1 (en) * | 2002-05-23 | 2008-05-06 | Saint-Gobain Ceramics & Plastics, Inc. | Zircon/zirconia mix for refractory coatings and inks |
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