JPH01239066A - Normal-pressure sintered material of boron nitride having high wear resistance and production thereof - Google Patents
Normal-pressure sintered material of boron nitride having high wear resistance and production thereofInfo
- Publication number
- JPH01239066A JPH01239066A JP63065313A JP6531388A JPH01239066A JP H01239066 A JPH01239066 A JP H01239066A JP 63065313 A JP63065313 A JP 63065313A JP 6531388 A JP6531388 A JP 6531388A JP H01239066 A JPH01239066 A JP H01239066A
- Authority
- JP
- Japan
- Prior art keywords
- boron nitride
- powder
- wear resistance
- surface area
- specific surface
- 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
- 229910052582 BN Inorganic materials 0.000 title claims abstract description 11
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims description 23
- 239000012298 atmosphere Substances 0.000 abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 238000001354 calcination Methods 0.000 abstract 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract 1
- 238000010304 firing Methods 0.000 description 14
- 239000011521 glass Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 9
- 230000035939 shock Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000009694 cold isostatic pressing Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Classifications
-
- 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
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/583—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on boron nitride
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は耐辛耗性の大なる窒化硼素常圧焼結体及びその
製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an atmospheric pressure sintered boron nitride body with high wear resistance and a method for producing the same.
〈従来の技術〉
窒化硼素（以下ＢＮという）は、電気絶縁性、熱伝導性
、耐食性、耐熱衝撃性、潤滑性、離型性等の優れた特性
を有する一方、機械加工の容易な数少ないセラミックス
である。<Prior art> Boron nitride (hereinafter referred to as BN) has excellent properties such as electrical insulation, thermal conductivity, corrosion resistance, thermal shock resistance, lubricity, and mold release properties, and is one of the few ceramics that can be easily machined. It is.
ＢＮは難焼結性のためＢＮ焼結体は主としてホットプレ
ス法によって作られるが、最近、ＢＮ焼結体を安価に製
造する方法として常圧焼結法が試みられている。しかし
ながら、ＢＮを主成分とする焼結体を得るためにはこれ
まで１７００〜２０００℃の高温での焼成が必要であっ
た（特開昭６１−１３２５６３号公報）。このような高
温で焼結させるためにＢＮの結晶化が進み潤滑性が優れ
る反面、硬度が低下し耐衝撃性が悪くなるので、潤滑性
、離型性、耐食性、耐熱衝撃性、耐摩耗性が要求される
摺動部材、ガラス成形用治具等の用途には向かない問題
があった。このようなりＮの耐摩耗性を向上させるため
に、Ａ １ ｚ（ｈ、ＳｉＯ□、ＡＩ！Ｎ 、、 Ｓｉ
３Ｎ４等を添加する試みがなされているが、耐摩耗性が
改善される反面、潤滑性、離型性が低下しガラスにキズ
が入る欠点があった。Since BN is difficult to sinter, BN sintered bodies are mainly produced by hot pressing, but recently, pressureless sintering has been attempted as a method for manufacturing BN sintered bodies at low cost. However, in order to obtain a sintered body containing BN as a main component, firing at a high temperature of 1,700 to 2,000°C has been necessary (Japanese Patent Application Laid-open No. 132563/1983). Because BN is sintered at such high temperatures, it crystallizes and has excellent lubricity, but on the other hand, its hardness decreases and impact resistance deteriorates, so it has poor lubricity, mold release properties, corrosion resistance, thermal shock resistance, and wear resistance. There was a problem in that it was not suitable for applications such as sliding members and glass molding jigs that required. In order to improve the wear resistance of N, A 1 z(h, SiO□, AI!N , Si
Attempts have been made to add 3N4, etc., but although this improves wear resistance, it has the drawback of decreasing lubricity and mold release properties and causing scratches on the glass.
また、１７００〜２０００ ’ｃの高温で焼結させるた
めに特殊な炉が必要となるのに加えてエネルギーコスト
も高くなり、更には昇温、冷却に時間がかかり生産能率
が悪くなるという欠点があった。In addition, a special furnace is required for sintering at a high temperature of 1700 to 2000'C, which increases energy costs.Furthermore, it takes time to heat up and cool down, which reduces production efficiency. there were.
これらの理由で、耐摩耗性、潤滑性、離型性、耐食性、
耐熱衝撃性に優れたＢＮ焼結体を安価にし７かも効率良
く製造できる方法の出現が待たれていた。For these reasons, wear resistance, lubricity, mold releasability, corrosion resistance,
The emergence of a method that can produce BN sintered bodies with excellent thermal shock resistance at low cost and with high efficiency has been awaited.
〈発明が解決しようとする課題〉
本発明は、このようなりＮ焼結体の耐摩耗性を改善し、
従来得られなかった耐摩耗性、潤滑性、離型性に優れた
ＢＮ焼結体及びその製造方法を提供することを目的とす
るものである。<Problem to be solved by the invention> The present invention improves the wear resistance of the N sintered body as described above,
The object of the present invention is to provide a BN sintered body with excellent wear resistance, lubricity, and mold releasability that has not been previously available, and a method for producing the same.
〈課題を解決するための手段〉
すなわち、本発明は、ショア硬さ３０〜６０でＢＮ９０
重量％以上を含有してなる耐摩耗性の大なるＢＮ常圧焼
結体、及び比表面積３０〜２００イ／ｇのＢＮ粉末を成
形後４００〜１４００°Ｃ未満の温度で常圧焼結するこ
とを特徴とするショア硬さ３０〜６０でＢＮ９０重量％
以上を含有してなる耐摩耗性の大なるＢＮ焼結体の製造
方法である。<Means for solving the problem> That is, the present invention provides a hardness of BN90 with a Shore hardness of 30 to 60.
After molding, a pressureless sintered body of BN with high wear resistance and a specific surface area of 30 to 200 i/g is sintered at a temperature of 400 to less than 1400°C. 90% by weight of BN with a Shore hardness of 30-60.
This is a method for producing a BN sintered body with high wear resistance, which contains the above.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明のＢＮ常圧焼結体のショア硬さは３０・〜６０好
ましくは４０〜６０である。３０未満では耐摩耗性が低
いためＢＮ常圧焼結体の摩耗が多く寿命が短くなる。一
方、６０を超えると潤滑性及び離型性が低下しガラス成
形用治具として用いた場合にガラスにキズが入る。The Shore hardness of the BN pressureless sintered body of the present invention is 30-60, preferably 40-60. If it is less than 30, the abrasion resistance is low, so that the BN pressureless sintered body is often worn and its life is shortened. On the other hand, if it exceeds 60, the lubricity and mold releasability will deteriorate and the glass will be scratched when used as a glass molding jig.
ＢＮ常圧焼結体中のＢＮ純度は、９０重量％以上である
。９０重量％未満では、ガラスと反応を起こすばかりで
なく耐熱衝撃性、潤滑性、離型性等の特性が悪化する。The BN purity in the BN pressureless sintered body is 90% by weight or more. If it is less than 90% by weight, it not only reacts with the glass but also deteriorates properties such as thermal shock resistance, lubricity, and mold releasability.
ＢＮ常圧焼結体の密度としては、１．５０ ｇ ／ｃｒ
Ａ以上であることが好ましい。１．５０ ｇ ／ｃｒＡ
未満では、気孔が多く緻密でないためショア硬さ、曲げ
強さが向上しない。また、曲げ強さとしては、３００ｋ
ｇ／ｃｎｉ以上であることが好ましい。３００ｋｇ ／
ｃＩ＋１未満では、ガラス成形用治具等として締め付
けた際に、あるいはガラスを乗せた際等に割れが生じる
おそれがある。The density of the BN pressureless sintered body is 1.50 g/cr
It is preferable that it is A or more. 1.50 g/crA
If it is less than that, the Shore hardness and bending strength will not improve because there are many pores and it is not dense. In addition, the bending strength is 300k
It is preferable that it is at least g/cni. 300kg/
If it is less than cI+1, there is a risk of cracking when it is tightened as a glass molding jig or when glass is placed on it.
次に、本発明のＢＮ常圧焼結体の製造方法について説明
する。Next, a method for manufacturing a BN pressureless sintered body of the present invention will be explained.
本発明で用いるＢＮ粉末は、比表面積３０〜２００ｍ／
ｇである。比表面積３０ｍ／ｇ未満では、焼結時にクラ
ックを生じるなどし良好な焼結体が得られない。一方、
比表面積が２００ｍ／ｇを超えると粉砕時の不純物混入
によりＢＮ純度が低下してガラスとの反応を起こしたり
潤滑性、離型性が低下する。さらにはショア硬さが高く
なりすぎてガラスにキズがつく。望ましくは９０〜１５
０ｍ／ｇである。The BN powder used in the present invention has a specific surface area of 30 to 200 m/
It is g. If the specific surface area is less than 30 m/g, cracks may occur during sintering, making it impossible to obtain a good sintered body. on the other hand,
When the specific surface area exceeds 200 m/g, the BN purity decreases due to impurities mixed in during pulverization, causing a reaction with glass and decreasing lubricity and mold releasability. Furthermore, the shore hardness becomes too high, causing scratches on the glass. Desirably 90-15
It is 0m/g.
この粉末を成形するに当っては、一般に良く知られてい
る金型成形機、冷間等方圧成形機（ＣＩＰ）等の公知の
成形機を用いることができる。In molding this powder, a well-known molding machine such as a generally well-known mold molding machine or a cold isostatic pressing machine (CIP) can be used.
成形圧力については、１ ｔｏｎ／ｃＪ以上好ましくは
３ ｔｏｎ／ｃｏ１以上である。１ ｔｏｎ／ｃａｔ未
満の成形圧力では緻密化が不充分となりショア硬さ３０
〜６０の焼結体を得ることが困難となる。The molding pressure is 1 ton/cJ or more, preferably 3 ton/co1 or more. If the molding pressure is less than 1 ton/cat, the densification will be insufficient and the Shore hardness will be 30.
It becomes difficult to obtain a sintered body of ~60.
焼成温度は４００〜１４００℃未満である。The firing temperature is from 400 to less than 1400°C.
４００℃未満の焼成では、耐熱衝撃性が低いためガラス
成形用材料として用いた際にクラックが発生ずる。一方
、１４００℃以上の焼成では、結晶化が進み、ショア硬
さが３０未満となり、耐摩耗性が低下する。When fired at temperatures below 400°C, cracks occur when used as a glass molding material due to low thermal shock resistance. On the other hand, when fired at 1400° C. or higher, crystallization progresses, the Shore hardness becomes less than 30, and wear resistance decreases.
焼成雰囲気については、焼成温度が４００〜８００℃ま
では酸化性雰囲気又は非酸化性雰囲気のどちらでも良い
が、焼成温度が８００℃を超えてからは非酸化性雰囲気
で行う。非酸化性雰囲気としては、Ｈｅ−、Ａｒ、 Ｎ
２等の不活性雰囲気や還元性雰囲気又は真空中である。The firing atmosphere may be either an oxidizing atmosphere or a non-oxidizing atmosphere until the firing temperature is 400 to 800°C, but a non-oxidizing atmosphere is used after the firing temperature exceeds 800°C. Non-oxidizing atmospheres include He-, Ar, N
In an inert atmosphere such as No. 2, a reducing atmosphere, or in a vacuum.
温度が８００℃以上の酸化性雰囲気で焼成するとＢＮが
酸化しガラスとの反応を起こすばかりでなく焼結体にク
ラックが発生する。焼成装置としては、抵抗加熱炉、高
周波炉等が採用される。When fired in an oxidizing atmosphere at a temperature of 800° C. or higher, BN not only oxidizes and reacts with the glass, but also causes cracks in the sintered body. As the firing device, a resistance heating furnace, a high frequency furnace, etc. are employed.
〈実施例〉
以下、本発明を実施例、比較例をあげてさらに具体的に
説明する。<Examples> Hereinafter, the present invention will be explained in more detail by giving Examples and Comparative Examples.
実路■１
ＢＮ粉末（電気化学工業■製グレードＣＰ、大方晶、Ｂ
Ｎ純度９９．０％、比表面積６ｍ／ｇ）をライカイ機で
比表面積が９０ ｒｄ ／ ｇになるまで粉砕し成形用
の粉末を得た。比表面積はＢＥＴ法にて測定した。Actual route ■1 BN powder (Denki Kagaku Kogyo ■ grade CP, orthogonal crystal, B
(N purity 99.0%, specific surface area 6 m/g) was pulverized using a Raikai machine until the specific surface area became 90 rd/g to obtain a powder for molding. The specific surface area was measured by the BET method.
この粉末を２ ｔｏｎ／ｃｕｔの圧力で金型成形した。This powder was molded into a mold at a pressure of 2 tons/cut.
得られた成形体をマンフル炉にて１０００℃、３時間、
Ｎ２雰囲気下にて焼成した。このようにして製造された
ＢＮ常圧焼結体について、ＢＮ純度、ショア硬さ、耐摩
耗性、離型性及び潤滑性を測定した。その結果を表に示
す。The obtained molded body was heated in a manful furnace at 1000°C for 3 hours.
It was fired under N2 atmosphere. Regarding the BN pressureless sintered body thus produced, BN purity, Shore hardness, wear resistance, mold releasability, and lubricity were measured. The results are shown in the table.
大絡桝叢
実施例１で得た成形用粉末を用い成形圧力をＩＬｏｎ／
ｃＩＩ！及び焼成温度を１３００°Ｃとしたこと以外は
実施例１と同様の方法にて実施した。Using the molding powder obtained in Example 1, the molding pressure was set to ILon/
cII! The same method as in Example 1 was carried out except that the firing temperature was 1300°C.
実衡炎ユ
実施例１で得た成形用粉末を用い、これを２ｔｏｎ／ｃ
ｕｔの圧力で冷間等方圧成形で行ったこと、及び焼成を
大気中、４００“Ｃで３時間焼成したこと以外は実施例
１と同様の方法にて実施した。Using the powder for molding obtained in Example 1, it was heated to 2 tons/c.
The same method as in Example 1 was carried out except that cold isostatic pressing was performed at a pressure of 100 ft and baking was performed in the air at 400"C for 3 hours.
災應炎↓
硼酸とメラミンとを１：１の重量比率で混合し、それを
アンモニア気流中にて１４００℃、６時間、加熱処理し
てＢＮ純度９５％、平均粒子径０．５μｍ、比表面積６
０ｍ／ｇのＢＮ粉末を得た。この粉末をＸ線回折した結
果、非晶質ＢＮであることが判った。このＢＮ粉末を用
いたこと及び焼成温度を１１５０ ’Ｃとしたこと以外
は実施例１と同様の方法にて実施した。Boric acid and melamine are mixed at a weight ratio of 1:1, and heated in an ammonia stream at 1400°C for 6 hours to obtain BN purity of 95%, average particle diameter of 0.5 μm, and specific surface area. 6
0 m/g BN powder was obtained. As a result of X-ray diffraction of this powder, it was found that it was amorphous BN. The same method as in Example 1 was carried out except that this BN powder was used and the firing temperature was 1150'C.
スＪ社団
実施例４で得たＢＮ粉末を用い焼成温度を６００℃とし
たこと以外は実施例３と同様の方法にて実施した。It was carried out in the same manner as in Example 3 except that the BN powder obtained in Example 4 was used and the firing temperature was 600°C.
尖詣貫工
実施例４で得たＢＮ粉末をライカイ機で比表面積が１２
０％／ｇになるまで粉砕し成形用の粉末を得た。この成
形用粉末を用いたこと及び焼成温度を５００°Ｃとした
以外は実施例３と同様の方法により実施した。The BN powder obtained in Sharpening Example 4 was processed using a Raikai machine to have a specific surface area of 12.
The powder was ground to 0%/g to obtain a powder for molding. The same method as in Example 3 was carried out except that this molding powder was used and the firing temperature was 500°C.
大止拠ユ
実施例６で得た成形用粉末を用いたこと及び焼成温度を
１１００℃としたこと以外は実施例１と同様の方法にて
実施した。It was carried out in the same manner as in Example 1, except that the molding powder obtained in Example 6 was used and the firing temperature was 1100°C.
此４石津１
実施例１で用いたＢＮ粉末をそのまま成形用粉末として
用いたこと以外は実施例１と同様の方法にて実施した。4 Ishizu 1 The same method as in Example 1 was carried out except that the BN powder used in Example 1 was used as it was as a molding powder.
北較開１
実施例１で得た成形用粉末を用い焼成温度を２００°Ｃ
としたこと以外は実施例３と同様の方法にて実施した。Kitakai Kai 1 Using the molding powder obtained in Example 1, the firing temperature was 200°C.
It was carried out in the same manner as in Example 3 except for the following.
ル較炭主
実施例４で得たＢＮ粉末を用い、これを２ｔｏｎ／ｃｏ
（の圧力で金型成型し、得られた予備成形体をＢＮ粉末
（前記、電気化学工業■製グレードＧＰ）の入った黒鉛
容器中に埋め込み、高周波炉にて、２０００℃、６０分
間Ｎ２雰囲気下で焼成したこと以外は実施例１と同様の
方法にて実施した。2 tons/co
The preformed body obtained was embedded in a graphite container containing BN powder (grade GP manufactured by Denki Kagaku Kogyo ■) in a high frequency furnace at 2000°C for 60 minutes in an N2 atmosphere. It was carried out in the same manner as in Example 1 except that the firing was carried out below.
ル較開↓
実施例４で得たＢＮ粉末をライカイ機で２３０ ｒｌ
／ｇになるまで粉砕し成形用の粉末を得た。この成形用
粉末を用いたこと以外は、実施例１と同様の方法にて実
施した。↓ BN powder obtained in Example 4 was heated to 230 rl using a Raikai machine.
/g to obtain a powder for molding. It was carried out in the same manner as in Example 1 except that this molding powder was used.
此土石１足
実施例１で用いた成形用粉末を用い焼成温度を１６００
℃としたこと以外は比較例３と同様の方法にて実施した
。1 pair of clay stones Using the molding powder used in Example 1, the firing temperature was set to 1600.
It was carried out in the same manner as Comparative Example 3 except that the temperature was changed to ℃.
表に記載した各物性の測定は次の方法によった。Each physical property listed in the table was measured by the following method.
（ＩＩＢＮ純度・・・・・・アルカリ融解−中和滴定法
（２） ショア硬さ・・・・・・ＪＩＳ Ｚ２２４
６に準拠して測定した。(IIBN purity...Alkali fusion-neutralization titration method (2) Shore hardness...JIS Z224
Measured according to 6.
（３）耐摩耗性・・・・・・テレビブラウン管用ガラス
板にφ１０Ｘ３０’のＢＮ常圧焼結体を１０ｋｇ／ｃＩ
１１の圧力にて押しつけ１５０ｒｐｍで６０分間回転さ
せて摩耗量（、ｍ３）を測定し耐摩耗性とした。(3) Abrasion resistance... 10 kg/cI of φ10 x 30' BN pressureless sintered body is applied to the glass plate for television cathode ray tubes.
Abrasion resistance was determined by pressing at a pressure of 11 and rotating at 150 rpm for 60 minutes to measure the amount of wear (m3).
（４）離型性・・・・・・１２００℃に溶融した硬質ガ
ラスをＢＮ常圧焼結体の表面に滴下し、融着反応等によ
り表面に跡が残るかどうか目視により評価した。(4) Mold releasability: Hard glass melted at 1200° C. was dropped onto the surface of the BN pressureless sintered body, and visually evaluated to see if any traces remained on the surface due to fusion reaction or the like.
○；融着反応等がなく良好
×；離型性が悪く融着反応等が発生
（５）潤滑性・・・・・・ＡＳＴＭ Ｄ１８９４に準
拠して摩擦係数を測定した。○: Good with no fusion reaction etc. ×: Poor mold releasability and fusion reaction etc. occurred (5) Lubricity...Friction coefficient was measured in accordance with ASTM D1894.
〈発明の効果〉
本発明によれば、簡単に耐摩耗性、潤滑性、離型性に優
れたＢＮ常圧焼結体を製造することができる。本発明の
ＢＮ常圧焼結体は摺動部材、ガラス成形用治具等の用途
に広く利用できる。<Effects of the Invention> According to the present invention, a BN pressureless sintered body having excellent wear resistance, lubricity, and mold releasability can be easily produced. The BN pressureless sintered body of the present invention can be widely used in applications such as sliding members and glass molding jigs.
特許出願人 電気化学工業株式会社Patent applicant: Denki Kagaku Kogyo Co., Ltd.
Claims (2)
を含有してなる耐摩耗性の大なる窒化硼素常圧焼結体。(1) Boron nitride atmospheric sintered body with high wear resistance and having a Shore hardness of 30 to 60 and containing 90% by weight or more of boron nitride.
を成形後４００〜１４００℃未満の温度で常圧焼結する
ことを特徴とするショア硬さ３０〜６０で窒化硼素９０
重量％以上を含有してなる耐摩耗性の大なる窒化硼素常
圧焼結体の製造方法。(2) Boron nitride powder with a Shore hardness of 30 to 60 and 90% is characterized by molding boron nitride powder with a specific surface area of 30 to 200m^2/g and then sintering it under normal pressure at a temperature of 400 to less than 1400°C.
A method for producing an atmospheric pressure sintered body of boron nitride having high wear resistance and containing at least % by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63065313A JP2614891B2 (en) | 1988-03-18 | 1988-03-18 | Method of producing boron nitride atmospheric pressure sintered body having high wear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63065313A JP2614891B2 (en) | 1988-03-18 | 1988-03-18 | Method of producing boron nitride atmospheric pressure sintered body having high wear resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01239066A true JPH01239066A (en) | 1989-09-25 |
| JP2614891B2 JP2614891B2 (en) | 1997-05-28 |
Family
ID=13283293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63065313A Expired - Fee Related JP2614891B2 (en) | 1988-03-18 | 1988-03-18 | Method of producing boron nitride atmospheric pressure sintered body having high wear resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2614891B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005056496A1 (en) * | 2003-12-11 | 2005-06-23 | Denki Kagaku Kogyo Kabushiki Kaisha | Ceramic sintered compact, method for producing ceramic sintered compact, exothermic element for vapor deposition of metal |
| US7914886B2 (en) | 2003-08-21 | 2011-03-29 | Saint-Gobain Ceramics & Plastics, Inc. | Structural component comprising boron nitride agglomerated powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065767A (en) * | 1983-09-19 | 1985-04-15 | 電気化学工業株式会社 | Manufacture of boron nitride sintered body |
-
1988
- 1988-03-18 JP JP63065313A patent/JP2614891B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6065767A (en) * | 1983-09-19 | 1985-04-15 | 電気化学工業株式会社 | Manufacture of boron nitride sintered body |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7914886B2 (en) | 2003-08-21 | 2011-03-29 | Saint-Gobain Ceramics & Plastics, Inc. | Structural component comprising boron nitride agglomerated powder |
| US8169767B2 (en) | 2003-08-21 | 2012-05-01 | Saint-Gobain Ceramics & Plastics, Inc. | Boron nitride agglomerated powder and devices comprising the powder |
| WO2005056496A1 (en) * | 2003-12-11 | 2005-06-23 | Denki Kagaku Kogyo Kabushiki Kaisha | Ceramic sintered compact, method for producing ceramic sintered compact, exothermic element for vapor deposition of metal |
| US7632768B2 (en) | 2003-12-11 | 2009-12-15 | Denki Kagaku Kogyo Kabushiki Kaisha | Ceramics sintered and exothermic body for metal vapor deposition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2614891B2 (en) | 1997-05-28 |
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