JPS5957905A - Production of cubic boron nitride - Google Patents
Production of cubic boron nitrideInfo
- Publication number
- JPS5957905A JPS5957905A JP57168269A JP16826982A JPS5957905A JP S5957905 A JPS5957905 A JP S5957905A JP 57168269 A JP57168269 A JP 57168269A JP 16826982 A JP16826982 A JP 16826982A JP S5957905 A JPS5957905 A JP S5957905A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- mixture
- powder
- boron nitride
- obtd
- 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
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims description 13
- 229910052582 BN Inorganic materials 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000012298 atmosphere Substances 0.000 claims abstract description 8
- IDBFBDSKYCUNPW-UHFFFAOYSA-N lithium nitride Chemical compound [Li]N([Li])[Li] IDBFBDSKYCUNPW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910020056 Mg3N2 Inorganic materials 0.000 claims abstract 2
- 239000003054 catalyst Substances 0.000 abstract description 25
- 239000000843 powder Substances 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000000155 melt Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 150000004767 nitrides Chemical class 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000005056 compaction Methods 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 238000000227 grinding Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 229910052903 pyrophyllite Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- -1 C83B2N Chemical compound 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は新規な触媒を使用して六方晶窒化ホウ素（以下
ＨＢＮという）から立方晶窒化ホウ素（以下ＣＢＮとい
う）を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing cubic boron nitride (hereinafter referred to as CBN) from hexagonal boron nitride (hereinafter referred to as HBN) using a novel catalyst.
周知のようにＣＢ Ｎ１−ｔダイヤモンドに近い硬さを
有し、しかも化学的安定性の点ではダイヤモンドよ、！
ｌｌｌ優ｎているため、研削材料（砥粒）とじての需要
が増大しつつある。As is well known, CB N1-t has a hardness close to that of diamond, and is even more chemically stable than diamond!
As a result, the demand for grinding materials (abrasive grains) is increasing.
上記のごときＣＢＮの工業的な製造方法としては、ＨＢ
Ｎの粉末と触媒粉末とを混合し、こ九を４０〜６０ｋｂ
ａｒ程度の高圧力、１４００〜１６００℃程度の高幅で
処理して、ＨＢＮをＣＢＮに変換する方法が一般的であ
る。このような方法に使用される触媒としては、アルカ
リ金属もしくはアルカリ土類金属の窒化物、またはアル
カリ金属もしくはアルカリ土類金属と窒素およびホウ素
からなる窒化ホウ素系３元化合物例えばＣ８３Ｂ２Ｎ、
や下での共晶融体への溶解度がＨＢＮよりＣＢＮの方が
小さいことを利用してＣＢＮを析出させるものである。As an industrial manufacturing method of CBN as described above, HB
Mix N powder and catalyst powder to form a powder of 40 to 60 kb.
A common method is to convert HBN into CBN by processing at a high pressure of about ar and a high temperature range of about 1400 to 1600°C. Catalysts used in such methods include nitrides of alkali metals or alkaline earth metals, or boron nitride-based ternary compounds consisting of alkali metals or alkaline earth metals, nitrogen, and boron, such as C83B2N,
CBN is precipitated by taking advantage of the fact that CBN has a lower solubility in the eutectic melt than HBN at low temperatures.
ところで研削材料（砥粒）としては、機械的強度、特に
圧壊強度が高いことが必要であシ、また強度に関連して
粒子の形状性が良好なこと、すなわち扁平な形状であっ
たり鋭角状の形状であったすせずに可及的に球体に近い
形状であること、あるいは表面の凹凸が少ないこと等が
要求さｎる。By the way, grinding materials (abrasive grains) need to have high mechanical strength, especially crushing strength, and in relation to strength, the particles must have good shape, such as flat or acute-angled shapes. It is required that the shape be as close to a sphere as possible, or that the surface have few irregularities.
しかるに前述の如く窒化物（２元化合物）や窒化ホウ素
系３元化合物を触媒として用いた従来の立方晶窒化ホウ
素製造方法においては、必ずしも充分な機械的強度、良
好な形状性を有するＣＢＮを得ることができるとは限ら
ないのが実情である。However, as mentioned above, in the conventional cubic boron nitride production method using a nitride (binary compound) or boron nitride-based ternary compound as a catalyst, it is not always possible to obtain CBN with sufficient mechanical strength and good shape. The reality is that this is not always possible.
すなわち従来の触媒を用いた方法では、製造条件の制御
等を相当に精密かつ複雑にしなければ強度改善や形状性
改善がなされないのが実情である。In other words, in the conventional method using a catalyst, the actual situation is that strength and shape cannot be improved unless manufacturing conditions are controlled very precisely and complicated.
そこで本発明者等はＣＢＮの強度改善、形状性改善を図
る方法を確立すべく鋭意実験・研究を行ない、新規な触
媒を開発し、これを用いることにより、強度、形状等の
優れたＣＢＨの製造に成功したものである。Therefore, the present inventors conducted extensive experiments and research in order to establish a method for improving the strength and shape of CBN, and developed a new catalyst.By using this, CBH with excellent strength, shape, etc. It was successfully manufactured.
この新規な触媒はＬｉ３Ｎ ：Ｘ ： Ｂ Ｎをモル比
で（１〜１．４）： （１〜１．４）：３の割合に配
合し、Ｎ２もしく￥′ｉＡｒ等の不活性雰囲気下、８０
０〜１３００℃で加熱して得られるものである。゛上記
でＸはＭｇ５Ｎ 又は５ｒ３Ｎ２又はＢｅ、Ｎ２である
。This new catalyst contains Li3N:X:BN in a molar ratio of (1-1.4): (1-1.4):3 and is prepared under an inert atmosphere such as N2 or \'iAr. , 80
It is obtained by heating at 0 to 1300°C. ``In the above, X is Mg5N, 5r3N2, Be, or N2.
この加熱処理によって生成する物質の構造等は明らかで
はない。しかし単なる混合物ではないと考えられる。な
ぜならこれらの混合物を触媒に用い、ＣＢＮを製造した
場合とこの生成物を触媒とした場合とでは効果が異なる
からである。The structure of the substance produced by this heat treatment is not clear. However, it is thought that it is not just a mixture. This is because the effects are different when CBN is produced using a mixture of these as a catalyst and when this product is used as a catalyst.
上記の処理において８００℃未満では加熱の効果が現れ
ない。また１３００℃を越えると、生成物の分解が起っ
ていると考えられる。加熱時間は２０〜６０分程度あれ
ば充分である。上記の温度範囲で混合物は発熱しながら
溶融する。こ九らの点から混合物から何らかの化合物が
生成したものと推測される。なお、前記でモル比を特定
した理由は、この割合に混合加熱した場合が、触媒とし
てその効果が大となるからである。In the above treatment, the effect of heating does not appear below 800°C. Moreover, when the temperature exceeds 1300°C, it is thought that decomposition of the product occurs. A heating time of about 20 to 60 minutes is sufficient. The mixture melts exothermically in the above temperature range. From these points, it is presumed that some kind of compound was produced from the mixture. The reason for specifying the molar ratio above is that when mixed and heated to this ratio, the effect as a catalyst becomes greater.
溶融物は不活性ガス中雰囲気中で冷却凝固させ、１５０
メツシュ以下程度に粉砕し、触媒として用いる。The melt was cooled and solidified in an inert gas atmosphere at 150
Grind it to a size smaller than mesh and use it as a catalyst.
次に前述のようにして得られた。触媒を用いて立方晶窒
化ホウ素を製造する方法を説明する。It was then obtained as described above. A method for producing cubic boron nitride using a catalyst will be explained.
先ず六方晶窒化ホウ素の望ましくは１５０メツシユ以下
の粉末１００重量部に対し、触媒とじて前記生成物の望
ましくは１５０メツシユ以下の粉末５〜５０重量部、望
ましくは１０〜３０重量部を配合し、均一に混合して圧
粉成形する。あるいはまた六方晶窒化ホウ素の粉末およ
び上述の触媒粉末を、そ九ぞれ各別に薄い板状に圧粉成
形し、これらを前述の配合比で交互に積層する。このよ
うにして得られた混合圧粉成形体もしくは積層体に対し
ＣＢＮの熱力学的安定領域、好ましくＩ／ｉ、１３００
〜１６００℃の高温下で４０〜６０ ｋｂａｒの高圧を
加え、５分〜４０分保持する。斯ぐす九ば立方晶窒化ホ
ウ素の結晶粒が得らｎる。なおこ１％らの湯度、圧力、
保持時間は従来と同様である。First, 5 to 50 parts by weight, preferably 10 to 30 parts by weight of powder of the above product, preferably 150 mesh or less, is blended as a catalyst to 100 parts by weight of hexagonal boron nitride powder, preferably 150 mesh or less; Mix uniformly and compact. Alternatively, the hexagonal boron nitride powder and the above-mentioned catalyst powder are individually compacted into thin plate shapes, and these are alternately stacked in the above-mentioned mixing ratio. The thermodynamic stability range of CBN for the mixed powder compact or laminate thus obtained, preferably I/i, 1300
A high pressure of 40-60 kbar is applied at a high temperature of ~1600°C and held for 5-40 minutes. In this way, crystal grains of cubic boron nitride are obtained. Naoko 1% hot water temperature, pressure,
The retention time is the same as before.
上述のように高温・高圧を与える手段としては種々考え
られるが、例えば第１図に示すような反応容器に前記混
合圧粉成形体もしくは積層体を収容し、通電するととも
にプレスにて加圧すれば良い。第１図にお−て、容器外
壁１は伝圧体としてのパイロフィライトによって円筒状
に作られ、その内側には黒鉛円筒体からなるヒーター２
および隔壁材としてパイロフィライト８が配設されてい
る。また容器の上下端にはそれぞれ通電用鋼製リング３
および通電用鋼板４が配設され、その内側には焼結アル
ばす板５および伝圧体としてのパイロフィライト６が配
設され、そしてそのパイロフィライト６および隔壁材と
してのパイロフィライト８によって取囲まれる空間が反
応原料を収容する収容室７となっている。As mentioned above, various means for applying high temperature and high pressure can be considered, but for example, the mixed powder compact or laminate is placed in a reaction vessel as shown in Fig. 1, and electricity is applied and pressure is applied using a press. Good. In Fig. 1, the outer wall 1 of the container is made of pyrophyllite as a pressure transmitting body in a cylindrical shape, and inside the outer wall 1 there is a heater 2 made of a graphite cylinder.
And pyrophyllite 8 is provided as a partition wall material. In addition, steel rings 3 for energizing are attached to the upper and lower ends of the container.
A sintered aluminum plate 5 and a pyrophyllite 6 as a pressure transmitting body are disposed inside thereof, and the pyrophyllite 6 and pyrophyllite 8 as a partition wall material are disposed. The space surrounded by is a storage chamber 7 that accommodates reaction raw materials.
以下に本発明の触媒を用いて立方晶窒化中つ素を製造し
た実施例および既知の物質を触媒として用いて立方晶窒
化ホウ素を製造した比較例を示す。Examples in which cubic boron nitride was produced using the catalyst of the present invention and comparative examples in which cubic boron nitride was produced using a known substance as a catalyst are shown below.
実施例１〜６
そ九ぞｉ”Ｌ １５０メツシユ以下に粉砕さｎた化合物
を第１表に示す割合に混合し、白金容器に収容してＮ２
ガスをｓｔ７分の流量で流しながら電気炉にて加熱昇温
させ、同表に示す条件下に保持した。Examples 1 to 6 Compounds pulverized to 150 mesh or less were mixed in the proportions shown in Table 1, placed in a platinum container, and heated with N2
The sample was heated and heated in an electric furnace while flowing gas at a flow rate of st7 minutes, and maintained under the conditions shown in the table.
反応生成物をＮ２ガス気流中にて電気炉内で冷却し、そ
の後Ｎ２ガス雰囲気中で１５０メツシユ以下に粉砕した
。The reaction product was cooled in an electric furnace in a N2 gas stream, and then ground to 150 meshes or less in a N2 gas atmosphere.
第 １ 表
上記各実施例によって得られた１５０メツシユ以下の粉
末と１５０メツシユ以下のＨＢＮ粉末とを窒素雰囲気中
にて均一に混合し、面圧カフ００Ｋｑ ／ ｃＪｒで外
径２０ｔａｎｓ長さ２０喘の円柱状に成形し、第１図に
示す容器内に収容し、高圧プレスにびＬｉ３Ｎ粉末、Ｍ
ｇ ｓ Ｎ２粉末、ハ粉末をモル比で１．１：１．２二
３に混合したもの（比較例２）及びＬｉ３Ｎ粉末、Ｓ
ｒ３Ｎ２粉末、ＢＮ粉末をモル比で１＝１：３に混合し
たもの（比較例３）を夫々触媒にして実施例と同様にＣ
ＢＨの製造を行なった。Table 1 The powder of 150 mesh or less obtained in each of the above Examples and the HBN powder of 150 mesh or less were uniformly mixed in a nitrogen atmosphere, and a surface pressure cuff of 00 Kq/cJr, an outer diameter of 20 tans and a length of 20 mm was prepared. It is molded into a cylindrical shape, placed in a container shown in Fig. 1, and pressed under high pressure to form Li3N powder and M
g s N2 powder, C powder mixed at a molar ratio of 1.1:1.22 (Comparative Example 2), Li3N powder, S
C
BH was produced.
これらの実施例及び比較例の各条件及び結果を第２表に
示す。Table 2 shows the conditions and results of these Examples and Comparative Examples.
なお、第２表中圧壊試験は次のようにして行なったもの
である。すなわちＷＣ−Ｃｏ製の直径１０節の上下のシ
リンダの下部シリンダ上に直径１００〜１５０μｍのサ
ンプル粒を１個置き、上部のシリンダを直流モータ駆動
によシ降下させた。そして上部シリンダが下部シリンダ
上のサンプル粒に接触する位置を電気的に検出し、これ
に対応する上下シリンダの表面間の距離りを求めてこｎ
を粒の直径とした。さらに荷重を増して行き、粒が破壊
する総荷重Ｗから、周知のように次の（１）式％式％（
１）
によシ粒の破壊強度σｔを求めた。但し実際にはそ九ぞ
ｆ１５０サンプルについて上述のような試験を行ない、
Ｄの平均値およびＷの平均値を求め、（１）式から平均
破壊強度を算出した。なお（１）式は、例えば「理化学
研究所報告Ｖｏ１３９．Ｎα６」（昭和３８年発行）、
第３１０頁に吉川弘之によって明らかにされている。The crush test in Table 2 was conducted as follows. That is, one sample grain with a diameter of 100 to 150 μm was placed on the lower cylinder of the upper and lower cylinders each having a diameter of 10 sections made of WC-Co, and the upper cylinder was lowered by driving a DC motor. Then, the position where the upper cylinder contacts the sample grain on the lower cylinder is electrically detected, and the corresponding distance between the surfaces of the upper and lower cylinders is determined.
is the grain diameter. As the load is further increased, from the total load W at which the grains break, as is well known, the following formula (1) % formula % (
1) The fracture strength σt of the Yoshi grains was determined. However, in reality, we conducted the above-mentioned test on the F150 sample.
The average value of D and the average value of W were determined, and the average breaking strength was calculated from equation (1). In addition, formula (1) is, for example, "RIKEN Report Vo139.Nα6" (published in 1960),
This is clarified by Hiroyuki Yoshikawa on page 310.
また表中、収率は配合したＨＢＮ （触媒は除く）に対
して生成したＣＢＮの比である。Furthermore, in the table, the yield is the ratio of CBN produced to blended HBN (excluding catalyst).
上記実施例及び比較例で得ら九たＣＢＨ粒の代図は比較
例３のものである。他の実施例、比較例についても同様
であった。この写真かられかるように本発明によるＣＢ
Ｎは全体として球形に近く、しかも表面に微細な凹凸が
少なく滑らかな形状をしていることがわかる。A representative diagram of the nine CBH grains obtained in the above Examples and Comparative Examples is that of Comparative Example 3. The same was true for other Examples and Comparative Examples. As you can see from this photo, CB according to the present invention
It can be seen that N has a nearly spherical shape as a whole and has a smooth shape with few minute irregularities on the surface.
さらに本発明によればＣＢＮの収率を上げることができ
る外、以下のような効果がある。Further, according to the present invention, in addition to being able to increase the yield of CBN, there are the following effects.
触媒組成物は予じめ焼成されてｂるので、ＣＢＮ生成の
高温高圧処理時間が短縮でき、その公金型が高幅高圧に
曝されている時間が短かくなるため金型の寿命が延びる
。Ｌｉ３Ｎ％Ｍｇ５Ｎ、等は予じめＢＮと混合し、処理
されているので、この間に反応が起っていると考えらｆ
’Ｌ、ＣＢＮ生成中にこの反応が起ることかなく、触媒
中にスムーズなＨＢＨの溶解−析出が可能となり、高品
位のＣＢＮが生成する。予じめ焼成さｎた触媒は安定な
組織が出来ると思われ、従来輩素等の雰囲気ボックス中
でしか扱えなかったものが大気中で充分安定であるため
、保管、取扱いか極めて容易になり、ＣＢＮ製造におけ
る再現性がよくなる。Since the catalyst composition is calcined in advance, the time required for high-temperature, high-pressure treatment to produce CBN can be shortened, and the time that the public mold is exposed to high pressure and high pressure is shortened, thereby extending the life of the mold. Since Li3N%Mg5N, etc. have been mixed with BN and treated in advance, it is thought that a reaction is occurring during this time.
'L, this reaction does not occur during CBN production, allowing smooth dissolution and precipitation of HBH in the catalyst, and high-grade CBN is produced. It is thought that a pre-calcined catalyst can form a stable structure, and since it is sufficiently stable in the atmosphere, it has become extremely easy to store and handle catalysts that could previously only be handled in an atmosphere box. , the reproducibility in CBN production is improved.
参考例
前記実施例と比較例によって得られた砥粒の代表例につ
いての研削試験を次に示す。Reference Example Grinding tests for representative examples of abrasive grains obtained in the above Examples and Comparative Examples are shown below.
粒度ｆｌＪＩｓ規烙の＃ １２０ ／ １４０を用−１
常法に従って電着砥石を製造した。砥石仕様、研削条件
は以下の通り。Particle size flJIs #120/140 -1
An electrodeposited grindstone was manufactured according to a conventional method. The grindstone specifications and grinding conditions are as follows.
Ｏ［剛力式 湿式平面研削（トラバースカット）（ｉ
ｆｆｉ石仕ｍ ＩＡｌ １８０Ｊ）Ｘ１０ＴＸ３
ＸＸ７６．２Ｈ粒度 ＃ １２０／ １４０
集中度 １００
砥石周速 １５００７７ｉ／分
テーブル送り １５ηｌ／分
クロス送ジ ２喘／バス
切 込 ２０μ／パス
研削液 ソリュブルタイプ
被削材 ５ＫＨ−５７（ＨＲＣ＝６２）結果は次の通り
。O [Rigid type wet surface grinding (traverse cut) (i
ffi stone finishing IAl 180J)X10TX3
XX76.2H Grain size # 120/140 Concentration 100 Grinding wheel peripheral speed 150077i/min Table feed 15ηl/min Cross feed 2 panes/bath cutting 20μ/pass Grinding fluid Soluble type work material 5KH-57 (HRC=62) Results is as follows.
実施例４ 比較例３ 研削比 ５８０ ４１０Example 4 Comparative example 3 Grinding ratio 580 410
第１図はＣＢＮを製造する際に使用される反応容器の一
例を示す縦断面図、第２図はこの発明の実施例４によっ
て得られたＣＢＮ粒の顕微鏡拡大写真（１００倍）、第
３図は比較例３によって得らｎたＣＢＮ粒の顕微鏡拡大
写真（１００倍）である。
■・・・容器外壁、 ２・・・ヒーター、３・
・・通電用鋼板リング、４・・・通電用鋼板、５・・・
アルミナ板、 ７・・原料収容室。
特許出願人 昭和電工株式会社
代理人 菊地精−
第１図FIG. 1 is a vertical cross-sectional view showing an example of a reaction vessel used in producing CBN, FIG. The figure is an enlarged micrograph (100 times magnification) of CBN grains obtained in Comparative Example 3. ■... Container outer wall, 2... Heater, 3...
...Steel plate ring for current-carrying, 4...Steel plate for current-carrying, 5...
Alumina plate, 7. Raw material storage chamber. Patent applicant Showa Denko K.K. agent Sei Kikuchi - Figure 1
Claims (1)
化ホウ素が熱力学的に安定である高温、高圧領域に保持
して立方晶窒化ホウ素を合成するに農シ、前記触媒とし
てＬｉ３Ｎ ： Ｘ ： ＢＮ をモル比で（１〜１．
４）： （１〜１．４）：３で配合し、予じめ８００
℃〜１３００℃の不活性算囲気中で焼成したものを用い
ることを特徴とする立方晶窒化ホウ素の製造法（上記で
ＸはＭｇ３Ｎ２又はＳ ｒ３Ｎ２又はＢｅ３Ｎ２） 。Li3N: : BN in molar ratio (1 to 1.
4): (1-1.4):3
A method for producing cubic boron nitride (X in the above is Mg3N2, Sr3N2 or Be3N2), characterized in that it is fired in an inert atmosphere at a temperature of 1300°C to 1300°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57168269A JPS5957905A (en) | 1982-09-29 | 1982-09-29 | Production of cubic boron nitride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57168269A JPS5957905A (en) | 1982-09-29 | 1982-09-29 | Production of cubic boron nitride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5957905A true JPS5957905A (en) | 1984-04-03 |
| JPH0314495B2 JPH0314495B2 (en) | 1991-02-26 |
Family
ID=15864881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57168269A Granted JPS5957905A (en) | 1982-09-29 | 1982-09-29 | Production of cubic boron nitride |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5957905A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5167221A (en) * | 1990-03-14 | 1992-12-01 | Kabushiki Kaisha Machida Seisakusho | Bending device |
| US7081424B2 (en) | 2003-12-25 | 2006-07-25 | Sumitomo Electric Hardmetal Corp. | High-strength, highly thermally conductive sintered compact of cubic boron nitride |
| US7214359B2 (en) | 2003-02-03 | 2007-05-08 | Showa Denko K.K. | Cubic boron nitride, catalyst for synthesizing cubic boron nitride, and method for producing cubic boron nitride |
| EP2177585A1 (en) * | 2003-08-20 | 2010-04-21 | Showa Denko K.K. | Cubic boron nitride, method for producing cubic boron nitride, grinding wheel with cubic boron nitride, and sintered cubic boron nitride compact |
| CN103924288A (en) * | 2014-04-01 | 2014-07-16 | 许斌 | Method for preparing cubic boron nitride monocrystal micro powder by using magnesium-based compound catalyst and application of cubic boron nitride monocrystal micro powder |
-
1982
- 1982-09-29 JP JP57168269A patent/JPS5957905A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5167221A (en) * | 1990-03-14 | 1992-12-01 | Kabushiki Kaisha Machida Seisakusho | Bending device |
| US7214359B2 (en) | 2003-02-03 | 2007-05-08 | Showa Denko K.K. | Cubic boron nitride, catalyst for synthesizing cubic boron nitride, and method for producing cubic boron nitride |
| EP2177585A1 (en) * | 2003-08-20 | 2010-04-21 | Showa Denko K.K. | Cubic boron nitride, method for producing cubic boron nitride, grinding wheel with cubic boron nitride, and sintered cubic boron nitride compact |
| US7703710B2 (en) | 2003-08-20 | 2010-04-27 | Showa Denko K.K. | Cubic boron nitride, method for producing cubic boron nitride, grinding wheel with cubic boron nitride, and sintered cubic boron nitride compact |
| US7081424B2 (en) | 2003-12-25 | 2006-07-25 | Sumitomo Electric Hardmetal Corp. | High-strength, highly thermally conductive sintered compact of cubic boron nitride |
| CN103924288A (en) * | 2014-04-01 | 2014-07-16 | 许斌 | Method for preparing cubic boron nitride monocrystal micro powder by using magnesium-based compound catalyst and application of cubic boron nitride monocrystal micro powder |
| CN103924288B (en) * | 2014-04-01 | 2016-08-17 | 山东建筑大学 | Use the cubic boron nitride monocrystal micropowder preparation method and application of magnesio composite catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0314495B2 (en) | 1991-02-26 |
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