JPH0153236B2 - - Google Patents
Info
- Publication number
- JPH0153236B2 JPH0153236B2 JP59075506A JP7550684A JPH0153236B2 JP H0153236 B2 JPH0153236 B2 JP H0153236B2 JP 59075506 A JP59075506 A JP 59075506A JP 7550684 A JP7550684 A JP 7550684A JP H0153236 B2 JPH0153236 B2 JP H0153236B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- foam
- present
- cao
- 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
Links
- 239000006260 foam Substances 0.000 claims description 24
- 239000000919 ceramic Substances 0.000 claims description 10
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 8
- -1 CaO compound Chemical class 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 13
- 239000000203 mixture Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 239000000292 calcium oxide Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 239000006028 limestone Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000975357 Salangichthys microdon Species 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000012149 noodles Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- QXDMQSPYEZFLGF-UHFFFAOYSA-L calcium oxalate Chemical compound [Ca+2].[O-]C(=O)C([O-])=O QXDMQSPYEZFLGF-UHFFFAOYSA-L 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000005332 obsidian Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、火山噴出物を用いたセラミツク発泡
体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing ceramic foam using volcanic ejecta.
セラミツク発泡体については過去多くの研究が
なされているが、すべて一長一短があつた。例え
ば、特開昭56−109859号公報には高炉水砕スラグ
に珪砂等の珪酸含有物、粘結剤、更に発泡助剤と
して炭化珪素を加えて、加熱発泡させる方法が記
載されている。しかし、高炉水砕スラグがどこで
も入手できるものではなく、しかも品質が一定し
ない為に、品質一定の製品ができ難い欠点があつ
た。
A lot of research has been done on ceramic foam in the past, but all of them have had their pros and cons. For example, JP-A-56-109859 describes a method in which granulated blast furnace slag is heated and foamed by adding a silicic acid-containing substance such as silica sand, a binder, and silicon carbide as a foaming aid. However, granulated blast furnace slag is not available everywhere and its quality is not consistent, making it difficult to produce products of consistent quality.
又、特公昭56−14627号公報にはシラス等の火
山噴出物と高炉水滓と水ガラス系組成物を加熱発
泡させることが記載されている。しかし、この方
法でできた発泡体は均一に発泡したものが得難
く、又機械的強度も低い欠点があつた。 Further, Japanese Patent Publication No. 56-14627 describes heating and foaming volcanic ejecta such as whitebait, blast furnace water slag, and a water glass composition. However, the foam made by this method has the disadvantage that it is difficult to obtain a uniformly foamed product and also has low mechanical strength.
本発明者等は、上記の原料入手が困難、品質が
一定しない、機械的強度が低いなどの欠点を解消
すべく研究した。その結果、本発明者等は、日本
全国に分布している火山噴出物や石灰石等のCaO
化合物を用いて発泡体ができること、特にCaO化
合物を入れることにより機械的強度の強い発泡体
が得られることを発見し、本発明を完成したもの
である。
The present inventors conducted research in order to eliminate the above-mentioned drawbacks such as difficulty in obtaining raw materials, inconsistent quality, and low mechanical strength. As a result, the present inventors discovered that CaO in volcanic ejecta, limestone, etc. distributed throughout Japan.
The present invention was completed by discovering that foams can be made using compounds, and in particular, that foams with strong mechanical strength can be obtained by adding CaO compounds.
即ち、本発明の要旨は、火山噴出物60〜90重量
部、CaO化合物40〜10重量部に、炭化珪素を添加
し、900〜1250℃に加熱して発泡させ、まだ熱い
軟化状態のうちに所望の形状に加圧成形すること
を特徴とするセラミツク発泡体の製造方法に存す
る。
That is, the gist of the present invention is to add silicon carbide to 60 to 90 parts by weight of volcanic ejecta and 40 to 10 parts by weight of CaO compound, foam it by heating it to 900 to 1250°C, and foam it while it is still hot and softened. The present invention relates to a method for producing a ceramic foam, which is characterized in that it is pressure-molded into a desired shape.
本発明では上記の組成になつているから、比較
的低い温度において、品質の一定したセラミツク
発泡体が得られ、しかもこのセラミツク発泡体の
機械的強度が強いものとなる。
Since the present invention has the above-mentioned composition, a ceramic foam of constant quality can be obtained at a relatively low temperature, and the mechanical strength of the ceramic foam is strong.
本発明に用いる火山噴出物としては、火山岩、
火山灰などであり、その化学組成において、
SiO2が45〜80％、A12O3が５〜25％が含まれてい
るものが好ましい。上記火山噴出物としては、例
えばシラス、黒曜石、真珠岩、松脂岩、軽石など
の火山灰、白土、ベントナイトなどの火山灰が変
質したもの、安山岩、玄武岩、坑火石、流紋岩、
御影石、長石、蝋石などの火山岩などが挙げられ
る。 The volcanic ejecta used in the present invention includes volcanic rock,
It is volcanic ash, etc., and its chemical composition is
It is preferable that SiO 2 is contained in an amount of 45 to 80% and A1 2 O 3 is contained in an amount of 5 to 25%. Examples of the above-mentioned volcanic ejecta include volcanic ash such as shirasu, obsidian, pearlite, rosinite, and pumice, altered volcanic ash such as white clay and bentonite, andesite, basalt, minestone, and rhyolite.
Examples include volcanic rocks such as granite, feldspar, and rouseki.
本発明に用いるCaO化合物としては、酸化カル
シウムの他、分解してCaOとなる水酸化カルシウ
ム、炭酸カルシウム、シユウ酸カルシウムなども
含むものであり、一般に天然に石灰石、石灰など
として多量に存在するものが使用できる。 In addition to calcium oxide, the CaO compounds used in the present invention include calcium hydroxide, calcium carbonate, calcium oxalate, etc., which decompose into CaO, and these compounds generally exist in large amounts naturally as limestone, lime, etc. can be used.
本発明に用いる炭化珪素は発泡剤として働くも
のであり、上記火山噴出物およびCaO化合物とと
もに加熱し、約900℃以上になると、SiC＋2O2→
SiO2＋CO2の如く分解し、炭酸ガスを発生するも
のである。 The silicon carbide used in the present invention works as a foaming agent, and when heated together with the above volcanic ejecta and CaO compound and heated to about 900°C or higher, SiC + 2O 2 →
It decomposes into SiO 2 + CO 2 and generates carbon dioxide gas.
本発明においては、上記火山噴出物とCaO化合
物とをそれぞれ60〜90重量部、40〜10重量部の割
合で混合するのであるが、火山噴出物とCaO化合
物の溶融を助け発泡し易くする為に、助剤として
水ガラス、ガラス粉末、又は本発明の発泡体の破
片を粉砕したものなどを加えてもよい。加える量
は、水ガラス、ガラス粉末では20重量部以下が好
ましく、10重量部以下が更に好ましい。20重量部
以上加えると耐熱性が劣り、又均一に発泡し難く
なつてくる。本発明の発泡体の破片は、いくら加
えても物性には関係なかつた。発泡体の破片のよ
うに一旦溶融したものを加えると、混合物の溶融
が均一に行くので特に好ましい。炭化珪素は発泡
剤となるものであり、製品の所望する発泡倍率に
よつて使用量が異なるが、多くの場合１重量部以
下で充分である。 In the present invention, the volcanic ejecta and the CaO compound are mixed at a ratio of 60 to 90 parts by weight and 40 to 10 parts by weight, respectively, to help melt the volcanic ejecta and the CaO compound and facilitate foaming. Water glass, glass powder, or crushed fragments of the foam of the present invention may be added as an auxiliary agent. The amount added is preferably 20 parts by weight or less, more preferably 10 parts by weight or less for water glass or glass powder. If more than 20 parts by weight is added, the heat resistance will be poor and it will be difficult to foam uniformly. No matter how much debris was added to the foam of the present invention, it had no effect on the physical properties. Addition of once melted material, such as foam fragments, is particularly preferred since the mixture will melt more evenly. Silicon carbide serves as a foaming agent, and the amount used varies depending on the desired foaming ratio of the product, but in most cases, 1 part by weight or less is sufficient.
本発明においては、それぞれの組成物を微粉末
状にし、所望の割合に混合し、必要な場合は水を
加え、混練し、成形するか、それぞれの微粉末状
混合物をプレス成形する。水を加えると粉末粒子
どうしの密着がよくなり、反応が均一に進む。こ
の成形する形状は、ペレツト状、うどん状或いは
最終製品の縮小した形状など任意の形状でよい。
このように成形したものを、電気炉、回転炉或い
はトンネル炉などを用いて加熱発泡させるのであ
る。 In the present invention, each composition is made into a fine powder, mixed in a desired proportion, water is added if necessary, kneaded, and molded, or each fine powder mixture is press molded. Adding water improves the adhesion between powder particles and the reaction proceeds uniformly. The shape to be molded may be any shape such as a pellet shape, a noodle shape, or a reduced shape of the final product.
The thus formed product is heated and foamed using an electric furnace, rotary furnace, tunnel furnace, or the like.
加熱温度は900℃〜1250℃である。加熱し、混
合物を900℃〜1250℃に約10分間加熱し続けると
溶融し均一に発泡する。この発泡したものが、ま
だ900℃前後と熱い軟化状態のうちに、所望の形
状に加圧成形する。その後、徐冷し、取り出し、
必要により最終製品形状に切断、切削加工する。 The heating temperature is 900°C to 1250°C. Heat and continue to heat the mixture to 900°C to 1250°C for about 10 minutes until it melts and foams uniformly. This foamed material is then pressure molded into the desired shape while it is still hot and softened at around 900°C. After that, slowly cool it, take it out,
Cutting and machining into the final product shape as necessary.
本発明においては、日本全国いたる所に産出す
る火山噴出物と石灰石などのCaO化合物を用いる
ものであるから、原料の入手に困難がなく、また
CaO化合物を加えてあるから、機械的強度の強い
ものが得られる。又、同一地域から産出するもの
はほぼ同じ組成のものであり、従つて製品の品質
のバラツキが少なく、良好なセラミツク発泡体が
得られる。又、発泡温度が低く、製造に際してエ
ネルギーコストが低いものになつている。
In the present invention, since volcanic ejecta and CaO compounds such as limestone, which are produced all over Japan, are used, there is no difficulty in obtaining raw materials.
Because CaO compounds are added, a product with strong mechanical strength can be obtained. Moreover, products produced from the same region have almost the same composition, so there is little variation in product quality, and good ceramic foams can be obtained. Furthermore, the foaming temperature is low, resulting in low energy costs during production.
本発明のセラミツク発泡体は、断熱材、耐火材
として、或いは建築物の外壁、屋根材などの建
材、その他種々の用途に好適に用い得るものであ
る。ちなみにガラス繊維からなる断熱材の耐熱性
は400℃前後であるのに対し、本発明のセラミツ
ク発泡体は900℃前後の耐熱性を有する。 The ceramic foam of the present invention can be suitably used as a heat insulating material, a fireproof material, a building material such as an outer wall of a building, a roofing material, and various other uses. Incidentally, the heat resistance of a heat insulating material made of glass fiber is around 400°C, whereas the ceramic foam of the present invention has a heat resistance of around 900°C.
次に本発明の実施例を示す。 Next, examples of the present invention will be shown.
実施例 １
微粉末状にしたシラス（鹿児島県垂水市産、
SiO2を71％、Al2O3を14％含有）67重量部、炭酸
カルシウム33重量部、炭化珪素0.2重量部に、水
30重量部を加え、充分混合混練した後、真空押出
機を用い、うどん状に成形し、これをコンベアー
上に並べ乾燥炉を通し乾燥させた後、トンネル炉
で1200℃に加熱したところ、うどん状組成物が発
泡しお互いに融着し板状になつた。更に900℃以
上の熱い軟化状態のうちにロールで上を押さえ平
らにし、徐冷したところ、板状発泡体が得られ
た。これを適当な長さに切断し製品となした。こ
の発泡体の比重は0.5であり、曲げ強度は50Kg／
cm2であつた。Example 1 Finely powdered whitebait (produced in Tarumi City, Kagoshima Prefecture,
Contains 71% SiO 2 and 14% Al 2 O 3 ), 67 parts by weight of calcium carbonate, 0.2 parts by weight of silicon carbide, water
After adding 30 parts by weight and thoroughly mixing and kneading, it was formed into udon noodles using a vacuum extruder, placed on a conveyor, dried through a drying oven, and then heated to 1200℃ in a tunnel oven. The composition foamed and fused to each other to form a plate shape. Furthermore, when the top was flattened by pressing with a roll while it was in a hot softened state at 900°C or higher and slowly cooled, a plate-shaped foam was obtained. This was cut into appropriate lengths and made into products. The specific gravity of this foam is 0.5 and the bending strength is 50Kg/
It was warm in cm2 .
実施例 ２
微粉末状にした安山岩（群馬県渋川市産、
SiO2を60.5％、Al2O3を17.3％含有）76重量部、
石灰石24重量部、炭化珪素0.15重量部に、水30重
量部を加え、充分に混合混練し、ペレツト状に成
形した。これを30分間回転炉に入れ、最高温度
1200℃に加熱したところ、回転炉から発泡したヘ
レツトがでてきた。まだ熱い（約1000℃）軟化状
態のうちに、ステンレス性の箱型の容器に入れ、
上から押さえ、各々の発泡したペレツトをお互い
に密着させた。この箱型の容器に入つている発泡
体を徐冷した後、取り出したところ矩形のブロツ
クができた。これを板状に切断し、板状のセラミ
ツク発泡体を得た。この発泡体は比重0.6、曲げ
強度70Kg／cm2であつた。Example 2 Finely powdered andesite (from Shibukawa City, Gunma Prefecture,
Contains 60.5% SiO 2 and 17.3% Al 2 O 3 ) 76 parts by weight,
30 parts by weight of water were added to 24 parts by weight of limestone and 0.15 parts by weight of silicon carbide, thoroughly mixed and kneaded, and formed into pellets. Place this in a rotary oven for 30 minutes to reach maximum temperature.
When heated to 1200℃, foamed herets came out of the rotary furnace. While it is still hot (approximately 1000℃) and softened, place it in a stainless steel box-shaped container.
Press from above to make each foamed pellet stick to each other. When the foam contained in this box-shaped container was slowly cooled and taken out, a rectangular block was formed. This was cut into plate shapes to obtain plate-shaped ceramic foams. This foam had a specific gravity of 0.6 and a bending strength of 70 kg/cm 2 .
Claims (1)
重量部に、炭化珪素を添加し、900〜1250℃に加
熱して発泡させ、まだ熱い軟化状態のうちに所望
の形状に加圧成形することを特徴とするセラミツ
ク発泡体の製造方法。1 Volcanic ejecta 60-90 parts by weight, CaO compound 40-10
A method for producing a ceramic foam, which comprises adding silicon carbide to parts by weight, foaming by heating to 900 to 1250°C, and press-molding into a desired shape while still hot and softened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7550684A JPS60221371A (en) | 1984-04-13 | 1984-04-13 | Manufacture of ceramic foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7550684A JPS60221371A (en) | 1984-04-13 | 1984-04-13 | Manufacture of ceramic foam |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8825789A Division JPH01301569A (en) | 1989-04-07 | 1989-04-07 | Production of ceramic foamed body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60221371A JPS60221371A (en) | 1985-11-06 |
| JPH0153236B2 true JPH0153236B2 (en) | 1989-11-13 |
Family
ID=13578191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7550684A Granted JPS60221371A (en) | 1984-04-13 | 1984-04-13 | Manufacture of ceramic foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60221371A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62223074A (en) * | 1986-03-20 | 1987-10-01 | 積水化学工業株式会社 | Manufacture of ceramic foam |
| JPS62223073A (en) * | 1986-03-20 | 1987-10-01 | 積水化学工業株式会社 | Manufacture of ceramic foam |
| US5976454A (en) * | 1996-04-01 | 1999-11-02 | Basf Aktiengesellschaft | Process for producing open-celled, inorganic sintered foam products |
| DE19619986A1 (en) | 1996-05-17 | 1997-11-20 | Basf Ag | Process for stabilizing sintered foam and for producing open-cell sintered foam parts |
| JP6387481B2 (en) * | 2013-08-23 | 2018-09-05 | 利夫 永見 | Manufacturing method of high properties foam ceramics |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5019286A (en) * | 1973-06-22 | 1975-02-28 | ||
| JPS51146505A (en) * | 1975-06-11 | 1976-12-16 | Matsushita Electric Ind Co Ltd | Manufacture of foamed ceramics |
-
1984
- 1984-04-13 JP JP7550684A patent/JPS60221371A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5019286A (en) * | 1973-06-22 | 1975-02-28 | ||
| JPS51146505A (en) * | 1975-06-11 | 1976-12-16 | Matsushita Electric Ind Co Ltd | Manufacture of foamed ceramics |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60221371A (en) | 1985-11-06 |
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