KR900008590B1 - Method for producing glass-ceramic metrial - Google Patents
Method for producing glass-ceramic metrial Download PDFInfo
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- KR900008590B1 KR900008590B1 KR1019880017511A KR880017511A KR900008590B1 KR 900008590 B1 KR900008590 B1 KR 900008590B1 KR 1019880017511 A KR1019880017511 A KR 1019880017511A KR 880017511 A KR880017511 A KR 880017511A KR 900008590 B1 KR900008590 B1 KR 900008590B1
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- 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
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- 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
- C04B35/14—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 silica
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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Abstract
내용 없음.No content.
Description
제1도는 일반적인 고로슬래그 이용글래스세라믹소재의 조직사진.1 is an organization picture of a glass ceramic material using a conventional blast furnace slag.
제2도는 사문암의 첨가량에 따른 글래스세라믹소재의 조직사진.2 is a tissue photograph of the glass ceramic material according to the amount of serpentine.
제3도는 본 발명에 부합되는 글래스세라믹소재의 조직사진.Figure 3 is a tissue photograph of the glass ceramic material in accordance with the present invention.
본 발명은 고로슬래그를 이용하여 글래스세라믹소재를 제조할 때 사문암을 첨가하므로써 조직을 개선하여 고강도, 내마모성재를 제조하는 방법에 관한 것이다.The present invention relates to a method for producing a high strength, wear resistant material by improving the structure by adding serpentine rock when manufacturing a glass ceramic material using blast furnace slag.
일반적으로 고로슬래그를 이용한 글래스세라믹(glass-ceramic) 소재는 통상의 고로슬래그조성(SiO2: 35wt%(이하 "%"라 칭함), CaO : 45%, Al2O3:15%. MgO : 5% 및 기타의 미량산화물)에 글래스화조장물질인 규사를 다량(50%이상) 첨가하고 이에 기핵물질 등을 첨가하여 최종조성범위를 SiO2: 60% 이상으로 유지시켜, 주조 및 결정화 열처리시키는 것으로 이러한 방법에 의하여 제조된 소재는 소련, 영국, 호주 및 일본등지에서 제조된 바 있다.In general, glass-ceramic material using blast furnace slag is conventional blast furnace slag composition (SiO 2 : 35wt% (hereinafter referred to as "%"), CaO: 45%, Al 2 O 3 : 15% .MgO: 5% and other trace oxides) is added a large amount (more than 50%) of siliceous glass cosmetic material and a nucleus material is added to it to maintain the final composition range of SiO 2 : 60% or more, casting and crystallization heat treatment The material produced by this method has been manufactured in the USSR, the UK, Australia and Japan.
그러나 이러한 방법에 의하여 제조된 소재는 고로슬래그의 이용비가 매우 낮고(50% 이하), 부원료를 대량으로 추가투입하여야 하기 때문에 제조원가의 상승이 따르고 생성상(相)이 일시적으로 동시에 결정되는 관계로 기핵제의 밀도에 따라 소재의 강도 및 내마모성에 영향을 미쳐 재현성있는 소재조직의 현출이 곤란한 것이 문제점이었다.However, the materials manufactured by this method have very low blast furnace slag cost (less than 50%), and additional raw materials must be added in large quantities, which leads to an increase in manufacturing cost and temporary formation of phases. The problem is that the density of the nucleating agent affects the strength and abrasion resistance of the material, making it difficult to express a reproducible material structure.
이점에 착안하여 기핵제로서 희유희토류산화물을 첨가하여 생성상의 성장속도를 조정, 조직을 개선하므로써 상기 문제점을 해결하고자 하는 방법이 제안되었는데, 이 방법에 따르면 투입된희유, 희토류원소는 핵생성과정에서 많은 결정면을 가지는 결정을 성장시키게 되면 이면에 수직방향으로 결정이 성장하게 되므로써 인접결정끼리 서로 맞물리는 형태의 조직을 형성하게 되어 소재의 기계적인 성질이 개선되어진다고 기술하고 있다. 그러나 희유, 희토류원소는 비록 그 작용은 우수하다하더라도 고가의 것으로, 대량으로 생산을 하여야하는 본 소재의 경우 비경제적일 뿐만 아니라 구득하기도 쉽지않는 것이 현실이다.In view of this, a method has been proposed to solve the above problem by adding a rare rare earth oxide as a nucleating agent to adjust the growth rate and improve the structure of the formation phase. According to this method, the rare and rare earth elements introduced in the nucleation process have been proposed. The growth of crystals with a crystal plane results in the growth of crystals in the vertical direction on the back surface, which results in the formation of a structure in which adjacent crystals interlock with each other, thereby improving the mechanical properties of the material. However, rare and rare earth elements are expensive even though their function is excellent, and the reality of this material, which must be produced in large quantities, is not only economical but also difficult to obtain.
또한 고온에서 용융될 때 상당량의 첨가원소가 비 등에 의한 유실을 동반하기 때문에 이의 사용은 특별한 경우 이외에는 제한될 수밖에 없다. 따라서, 본 발명은 이와 같은 문제점을 해결하기 위하여 일반적으로 글래스세라믹제조에 있어 글래스망상구조의 파괴산화물(glass modifing oxide)에 속하여 그 사용이 불리하다고 알려진 MgO를 사문암의 형태로 첨가하여 슬래그중에 필연적으로 함유되는 알루미나와 결합시켜 새로운 초기결정상을 1차상으로 생성시키므로 내마모성이 우수한 고강도 글라스세라믹소재를 제조하고자하는 것인바, 이를 상세히 설명하면 다음과 같다.In addition, since a significant amount of additive elements are accompanied by a loss due to rain when melted at a high temperature, their use is limited only in special cases. Therefore, in order to solve such a problem, the present invention inevitably adds MgO in the form of serpentine rock, which is known to be disadvantageous in glass modifing oxide of glass network structure in glass ceramic manufacturing. By combining with the alumina contained to produce a new initial crystal phase as a primary phase to produce a high-strength glass ceramic material with excellent wear resistance, as described in detail as follows.
즉, 본 발명은 고로슬래그 : 57-65%, 규사 : 25-30%, 알루미나질폐연화(廢煉瓦) : 4-5%, 사문암 : 3.5-4.5% 그리고 첨가제로서 기핵제인 크롬광 : 3-4% 및 소다회 : 1.5-2.3%를 단독 또는 복합적으로 첨가하여 최종조성비가 SiO2: 44-50%, Al2O3: 12-16%, CaO : 20-25%, MgO : 5.8-6.2%, Cr2O3: 1-1.4% 및 Fe2O3: 1-4%로 조성되도록 하는 구성으로 이루어진다.In other words, the present invention is blast furnace slag: 57-65%, silica sand: 25-30%, alumina pulmonary softening (-5): 4-5%, serpentine rock: 3.5-4.5% and chromium ore as a nucleating agent as an additive: 3-4 % And soda ash: 1.5-2.3% alone or in combination, the final composition ratio of SiO 2 : 44-50%, Al 2 O 3 : 12-16%, CaO: 20-25%, MgO: 5.8-6.2%, Cr 2 O 3 : 1-1.4% and Fe 2 O 3 : It is composed of a composition to be composed of 1-4%.
고로슬래그중의 MgO는 CaO와 함께 실리카방상구조를 파괴하여, 결정화가 일어날때 이온의 이동을 쉽게 잔류글래스의 양을 떨어뜨리는 역할을 하게된다. 그러나, 사문암으로써 첨가된 MgO의 경우 그 재화성이 낮기 때문에 용융슬래그중에 충분히 용해되지 못하고 고온에서 주변의 알루미늄산화물과 반응하여 스피넬(Spinell)과 같은 고온정출상을 초기에 형성하게 되고 결정성장시 다면체의 핵으로 작용하여 이러한 면에 수직되게 결정성장이 이루어지도록 하는 역할을 하게된다.MgO in the blast furnace slag, along with CaO, destroys the silica structure, and the ions move easily to reduce the amount of residual glass when crystallization occurs. However, MgO added as serpentine has low reproducibility, so it does not dissolve sufficiently in molten slag and reacts with surrounding aluminum oxide at high temperature to form hot crystallized phase such as spinel at an early stage. It acts as the nucleus of and plays the role of making crystal growth perpendicular to this plane.
상기 사문암의 첨가량이 3.5%이하인 경우에는 결정조직의 맞물리는 현상이 저하게되며, 4.5%이상인 경우에는 단일결정상의 생성이 조장되는 결과를 초래하기 때문에 사문암첨가량은 3.5-4.5%범위가 바람직하다.When the amount of serpentine added is less than 3.5%, the interlocking phenomenon of the crystal structure is reduced, and when the amount of serpentine is more than 4.5%, the amount of serpentine added is preferably in the range of 3.5-4.5%.
상기 SiO2, Al2O3, CaO 및 MgO의 조성범위는 1차 결정상을 메틸라이트(Melilite)로 형성하기 위하여 한정되는 것으로서, 이 메틸라이트를 초기결정상으로 유도할 경우, 고로슬래그의 첨가비율을 높일 수 있는 장점이 있다.The composition range of the SiO 2 , Al 2 O 3 , CaO and MgO is limited in order to form the primary crystal phase as methyllite (Melilite), when the methyllite is induced to the initial crystal phase, the addition ratio of blast furnace slag There is an advantage to increase.
특히, 본 발명은 1차생성을 고온생성상으로 조정하였기 때문에 핵생성온도와 결정성장온도가 거의 일치되어 결정화속도를 높일 수 있는 장점이 있다.In particular, the present invention has the advantage that the rate of crystallization can be increased because the nucleation temperature and the crystal growth temperature are substantially matched since the primary formation is adjusted to the high temperature generation phase.
이하 실시예를 통하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail through examples.
[실시예 1]Example 1
사문암의 첨가효과를 파악하기 위하여 전기 아크로전극봉을 가공하여 만든 도가니가 내장된 고주파유도용 해로에서 하기표 1의 조성으로 용융된 슬래그중에 40%의 SiO2와 35%의 MgO를 함유한 사문암의 조성을 3.0%, 4.0%, 5.0%로 변화시켜 투입하여 그래스세라믹 소재를 제조한 다음, 이의 조직을 관찰하여 제2도에 나타내었다.In order to understand the effect of serpentine rock, the composition of serpentine rock containing 40% SiO 2 and 35% MgO in molten slag with the composition shown in Table 1 in the crucible-embedded high frequency induction furnace made by processing electric arc electrode It was changed to 3.0%, 4.0%, and 5.0% to prepare a glass ceramic material, and then the structure thereof was observed and shown in FIG. 2.
이때, 세라믹의 용융온도는 1550℃이었으며, 주조후 결정화 열처리온도는 860℃이고 시간은 3시간이었다.At this time, the melting temperature of the ceramic was 1550 ℃, after the casting crystallization heat treatment temperature was 860 ℃ and time was 3 hours.
[표 1]TABLE 1
(단위 : 중량%)(Unit: weight%)
제2도에서 알 수 있는 바와 같이, 3.0%의 사문암을 투입하는 경우에는 결정상의 상호맞물리는 현상이 거의 관찰되지 않으며(제2a도), 5.0%의 사문암을 투입하는 경우에는 단일결정상의 생성이 조장되는 결과(제2c도)를 초래하는 반면에, 본 발명에 부합되는 4.0%의 사문암을 투입하는 경우에는 결정화초기에 1차적으로 고온정출상을 생성시킨 후 2차, 3차결정상을 생성 및 성장시키므로 결정상들의 보다 심한 맞물림 현상(제2b도)이 관찰되었다.As can be seen in FIG. 2, when the 3.0% serpentine is injected, crystal interlocking phenomena are hardly observed (FIG. 2a). On the other hand, in the case of adding 4.0% of serpentine rock in accordance with the present invention, a high-temperature crystallized phase is produced first in the initial stage of crystallization, and then a secondary and tertiary crystal phase is generated. As they grew, more severe interlocking of crystal phases (Figure 2b) was observed.
상기한 조직상태로부터 세라믹소재의 기계적성질을 예측할 수 있는 바와 같이, 사문암을 4.0%로 첨가하는 경우가 3.0% 및 50%를 첨가하는 경우보다 기계적성질 즉, 곡강도, 압축강도 및 경도가 우수하게 나타났다.As the mechanical properties of the ceramic material can be predicted from the above-described tissue state, the addition of serpentine at 4.0% showed better mechanical properties, that is, bending strength, compressive strength, and hardness than the addition of 3.0% and 50%. .
[실시예 2]Example 2
종래방법 및 본 발명에 따라 제조된 글래스세라믹소재의 기계적 및 현미경조직사진을 관찰하기 위하여 V2O5를 기핵제로 첨가하여 제조한 종래재와 상기 표 1의 조성으로 용융된 슬래그중에, 40%의 SiO2와 35%의 MgO를 함유한, 사문암을 4.0% 투입하여 제조한 발명재에 대하여 기계적성질을 측정하고 그 결과를 하기 표 2에 나타내었으며, 이에 대한 조직사진은 제1도 및 제3도에 나타내었다.In order to observe the mechanical and microscopic picture of the glass ceramic material prepared according to the conventional method and the present invention, 40% of the conventional material prepared by adding V 2 O 5 as the nucleating agent and the molten slag in the composition of Table 1 above Mechanical properties of the invention prepared by adding 4.0% of serpentine containing SiO 2 and 35% MgO were measured and the results are shown in Table 2 below. Shown in
[표 2]TABLE 2
상기 표 2 및 제1도 및 제3도에 나타난 바와 같이, 본 발명재는 종래재에 비하여 기계적성질 즉, 곡강도, 압축강도 및 경도가 우수함을 알 수 있으며, 본 발명재를 나타내는 제3도의 조직이 조직강화처리전의 조직 [제1a도] 및 V2O5를 기핵제로 첨가하는 종래재 [제1b도] 보다 심한 맞물림상태를 갖는다.As shown in Table 2 and FIG. 1 and FIG. 3, the present invention material has superior mechanical properties, that is, bending strength, compressive strength and hardness, as compared to the conventional material, and the structure of FIG. Tissues before the tissue strengthening process [FIG. 1 a] and V 2 O 5 are more engaged than the conventional materials [FIG. 1 b] to which the nucleating agent is added.
이는 본 발명의 우수한 기계적성질을 입증해 주고 있는 것이다.This demonstrates the excellent mechanical properties of the present invention.
상술한 바와 같이, 본 발명은 고로슬래그를 주원료로하고 여기에 규사 및 기타의 조제제를 첨가하여 용융시키는 과정에 첨가되는 사문암의 낮은 재화성을 이용하여 초기생성핵을 스패넬결정으로 유도시키므로서 이핵의 면에 수직되게 1차결정상을 성장시켜 인접결정끼리 서로 맞물리는 효과를 조장시켜 내마모성 및 강도가 우수한 글래스세라믹소재를 제조할 수 있으므로, 종래방법보다 고로슬래그의 사용비를 높임과 동시에 값싼 원료를 이용할 수 있는 효과가 있는 것이다.As described above, the present invention utilizes the low reproducibility of serpentine rock, which is added to the process of melting blast furnace slag as a main raw material and melting silica sand and other preparations, thereby inducing the initial production nuclei into spanel crystals. It is possible to manufacture glass ceramic materials with superior wear resistance and strength by growing primary crystal phases perpendicular to the surface of the nucleus, thereby increasing the wear resistance and strength. There is an effect that can be used.
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1988
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