TW303318B - - Google Patents
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- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
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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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K3/14—Anti-slip materials; Abrasives
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1409—Abrasive particles per se
- C09K3/1418—Abrasive particles per se obtained by division of a mass agglomerated by sintering
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Description
經濟部中央梯準局貝工消費合作社印製 ^03318 發明背景 .本發明係關於高鋁磨料砂粒,特定言之,係關於具有改 進之研磨性能之溶膠-凝膠氧化鋁磨擦物料。 溶膠-凝膠氧化鋁磨料背知係經由在大約丨25至2〇〇1下 乾燥一種^氧化鋁前驅體的溶膠或凝膠(通常它是,但並非 基本上是勃姆石)而移除凝膠中之水組分;粉碎經過乾燥之 凝膠成爲作爲磨料砂粒之所需要大小的顆粒;或,烺燒顆 粒(通常在自大約400。至⑽代之溫度下)而形成中間形式 的氧化銘,《後在(分南之溫度下最後%結經過懷燒之碎 片將它自-種中間形式例如α氧化銘轉變成。氧化銘形式 。舉例而言,簡單之溶膠-凝膠方法記述於美國專利 4’3U,827 ; 4’518,397 ; 4,881,951和英國專利申請案 2 〇99 〇12 案中。 在一種特別需要形式的溶膠-凝膠方法中,將α氧化鋁前 驅體使用具有儘可能接近於α氧化銘本身者之相同晶體結 構和印格參數之物料晶種。該"晶種"係以儘可能細分之形 式添加入幷予以均勻分散遍及溶膠或凝膠可將它從最初加 ^或可使Ε晝|形成。晶種的功能是在較無晶種存在時所 須之溫度低得多的溫度下,致使轉變成爲π形式均勾發生 遍歷前驅體。此方法產生一種晶體結構,其中α氧化鋁的 個別晶體(即經由高角晶粒界面與接鄰晶趙相分隔之實質上 相同結晶學之定向的那些區域)大小是極均勻且基本上直徑 句是次微米。適當之晶種包括α氧化銘本身但亦包括其他 化合物例如Λ氧化鐵,低氧化鉻,鈦酸鎳和許多其他化合 本紙張尺度適用中國圏家樣準(CNS ) Α4胁(21GX297公釐 — I - (請先聞讀背面之注^r項再填寫本頁) -訂 -4- A7 B7 經濟部中央梂準局貝工消费合作社印製 五、發明説明(2 ) 物,此等其他化合物具有極爲相似於α氧化鋁者之晶格參 數而能在低於無晶種存在時通常發生轉化時之溫度的溫度 下,致使自前驅體產生α氧化鋁有效。此等晶種之溶膠_凝 膠方法的實例記述於美國專利4 623 364 ; 4 744 8〇2; 4,954,462; 4,964,883 ; 5,192,339 ; 5,215,551; 5,219,806^^ 多其他者中。 時常較佳地,將經過乾燥之溶膠·凝膠視情況可烺燒以便 使在昇高之燒結溫度下所須要之時間減至最短。這是因爲 燒結操作實踐轉化過渡之氧化鋁形式成爲“形式幷燒結π 氧化鋁而閉合殘餘之孔隙度的任務並保證:各顆粒具有充 分之密度和硬度作爲磨料砂粒充分有效用。眾人皆知:在 燒結溫度下之過量時間,就予以晶種之溶膠_凝膠物料而言 三通常是在13〇〇。與140〇1間及高於未經晶種之溶膠-凝膠 氧化鋁者大約10(TC可導致晶體生長。因爲通常晶體生長視 爲所不欲,所以分開進行烺燒認爲適當而因此將在此等高 溫下所歷之時間減至最少。儘管維持兩次高溫操作的額3 成本仍遵循該項程序。 因爲乾燥操作接著是壓碎和篩選操作,所以將晶粒降至 室溫并將乾燥晶粒所使用之熱放棄至周圍環境中。當然, 這是極無效率。 壓碎操作係在乾燥後予以實施因爲,在此時物料相當容 易弄碎。如果將它留置直至在燒結操作後,則該物料 非常硬以致可能需要過量之能量。因此,常理是在預燒二 階段時將它壓碎。另外,認爲:燒結將更爲有效率因爲2 &紙張度適用中國國家祿準(CNS ) A4规格(210X297公釐 l·-------------1#------^ 1 (請先閲讀背面之注意事項再填寫本X) -5- A7 B7 經濟部中央橾準局貝工消費合作社印製 五、發明説明(3 果顆粒小時,彼等在爐中將可更迅迷達到繞結溫度。 頃發現:經由溶膠-凝膠方法可能顯著減少製造氧化鋁時 所涉及之能量消耗。此目的經由以與設計各習知方法時所 使用之直覺的理由完全相反之一種方式操縱該方法予以達 成。本新穎方法以極需要之形式產生α氧化銘顆粒,此形 式是完全緻密且極適合使用於各種摩擦應用用途。而且, 該系統具有充分之撓性容許設計所獲得之磨料砂粒。 發明之概述 本發明的方法包括直接饋送具有以重量計至少5 %的可發 揮含量之經過乾燥但未經燒結之溶膠-凝膠氧化鋁進入經維 持在高於4 0 0 °C溫度下之一只爐中幷控制溫度和滞留時間 而產生一種爆炸性粉碎之氧化鋁。在某些狀況下,當爐中 之溫度是充分高且在其中之時間是充分長時,可將溶膠_凝 膠乳化銘直接轉化成α氧化Is形式幷燒結至達到至少9 5 % 理論上密度之密度。 溶膠-凝膠氧化銘通常乾燥而形成其大小爲數毫米之塊而 此物基本上是經乾燥之勃姆石,其每一分子具有一個相結 合之水的分子,也許具有於乾燥時未予完全移去之一些殘 留水。另外,時常將有利之改良劑例如鎂氧,氧化釔,氧 化如,氧化铯或稀土或過渡金屬氧化物以其可溶性硝酸鹽 的形式添加至溶膠-凝膠中而此等氧化物亦可促成可揮發之 組份(例如氮氧化物)至經乾燥過的凝膠中。如果使用一種 酸例如硝酸或乙酸來膠溶該溶膠-凝膠則亦可能有此酸的殘 本紙張尺度遑用中國國家標準(CNS ) A4规格(210X297公釐) (.請先閲讀背面之注意事項再填寫本頁) 裝· -訂 五、發明説明(4 ) A7 B7 經濟部中央橾準局—工消費合作社印拏 渣在經過乾燥之溶膠_凝膠中。 以重量計自大約5至大约消^常^過乾燥(凝膠具有 45〇%的總可揮發之含量,以自大約 10至大約45%較佳而更佳是自 定目大”力2 〇至大約4 0 %。通常乾 兔係在低於大約20〇。(:之溫度下予以 溫度下進行。因此之故,當 *更氐又 田將匕加進爐中時,經乾燥過之 凝膠含有相當數量的可蒸氣化之物料。 =然本發明主要係關於爆炸性粉碎經過乾燥之溶膠·凝膠 物料’但是此等物料亦可包括其本身不含任何可揮發之物 料的其他組份。因,匕’可能包括各種組份例如…氧化 銘粉末,碳化碎(顆粒和鬚晶等形式),氧化錐,立方一氮 化硼及其他摩擦性物料在溶膠-凝膠物料中,假若經乾燥之 混合物中可揮發性物料的總含量依然高於以重量計5%物料 〇 當將經乾燥之凝膠料U爐巾時,塊巾之可蒸氣化物 料爆炸性膨脹而致使彼等飛離,留下較小顆粒,此等較小 顆粒極制於❹應㈣途。如果㈣巾之㈣時間是足 分長’則將留下之較小顆粒迅速轉化成α相幷極速燒結成 基本上完全緻密之形式。此方法的劇烈性質導致它日常予 以敘述成"爆炸性粉碎",唯在較佳具體實施例中,該方法 遠超過粉碎幷包括燒結i仪相且在《些情況下可燒結至基 本上理“之法度。於溫度是略低之情況,粉碎的數量可能 略減且主要可導致較大碎片的破裂和創造弱線在其餘之碎 片中,此等弱線在隨後粉碎操作中致使彼等容易破裂,然 而亦將此方式視爲爆炸性粉碎。 {請先閲讀背面之注意事項再填寫本頁) • m I Lf . 衮· 訂
A7 B7 經濟部中央揉準局貝工消费合作社印裝 五、發明説明( 因此,S將經過乾燥之溶膠-凝膠氧化鋁顆粒饋送入爐中 且不須使用任何外部所施加之力而至少部份地碎成較小顆 粒時,則相信形成了"爆炸性粉碎之"物料。 當爐中滯留時間是相當短或爐溫是相當低時,當物料自 爐中出口時,燒結方法和甚至轉化成α相可能尚未完成。 在此事件時,某些或全部的顆粒可能多孔達某—程度而此 等相當鬆弛之硬化之較大顆粒,在一只分開之爐中予以燒 結達超過95%理論値之密度或經由第二次通經旋轉爐前, 可經由輕研磨操作予以碎裂。有時這是較佳,因爲極強列 爆炸性粉碎可導致產生甚大數量的極細顆粒而在某些摩擦 應用用途方面極細顆粒可能不太有用。不甚嚴格之爆炸性 粉碎具有使甚至顯然未破裂之顆粒在隨後操作中極易粉碎 的效果。另-種且有時較佳之方式,可將未予完全爆炸性 粉碎之經燒結之物料(時常它具有孔隙度)至少部份地浸潰 以一種可揮發之液體例如水幷再一次通經旋轉爐而完成粉 碎。 調整燒結條件而產生如上所述,呈多孔之產物亦供給使 用改良劑之溶液浸潰多孔物料的機會,改良劑之溶液舉例 而言例如鎂,釔,一種過渡元素,铷,铯或—種稀土金屬 的可溶性鹽之水溶液。於燒結時,通常此等物料可產生極 有效形式之變型氧化物幷同時產生另外數量的可揮發之物 料’可使用此可揮發之物料來產生爆炸性粉碎。 以上述方式所製備之摩擦顆粒較經由許多習見方法所獲 知您顆粒時常具有預料不到之較佳研磨性能。推理而士, 本紙張歧賴巾關家料(CNS )从秘(2丨 (請先閱讀背面之注意事項再填寫本頁) 裝.
,tT 經濟部中央橾準局員工消費合作社印製 A7 —______ B7____ 五、發明説明(6 ) — 〜 這可能是因爲粉碎技術未施加物理應變在該型之物料上, 物理應變可能引起缺點在磨料砂粒結構中。不管理論如何 ,此項性能改進是出人意表且重大。-圖式 圖1顯示經過晶種之溶膠-凝膠氧化鋁的差示熱分析(D τ A) 示踪。 圖2顯示適合於實現本發明方法之一個具體實施例之儀器 的簡化正視圖。 發明之詳細説明 自如圖1中所示之圖式’它是當昇高其溫度時,跟踪一種 予以晶種之溶膠-凝膠之差示熱分析。可見在大約斗㈧^時 有吸熱。此現象顯示包括水,酸和鹽分解產物之各種揮發 物的失去。就是此種揮發物之失去而造成爆炸性粉碎。顯 然’此項揮發物失去發生愈快,分解具有之爆炸性亦愈大 。近於大約6〇o°C時,欲予移出之揮發物的數量顯著減少 而轉化成無水相的氧化鋁例如r氧化鋁乃告完成。在更較 高之溫度下,開始轉化成α相。關於經過晶種之溶膠_凝膠 物料,此現象在大約1150Χ:下或甚至更低溫度下發生。此 經由圖1中之峰予以顯示。在未經晶種之溶膠-凝膠中除去 α轉化峰將在相當較高之溫度下,也許125(rc或如此之溫 度下發生外,示踪將極相似。 爲了實施本發明,僅須在將揮發物開始逐出時之溫度 -9- (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 .丄 本紙張尺度適用中國鬮家標準(CNS ) ( 210X297公釐) 經濟部中央棣準局貝工消費合作社印製 A7 B7 五、發明説明(7 ) 下加熱。顯然除去最低溫度以外較高之溫度有利於具有極 大爆炸效果之極速分解。然而,如果加熱充分快速,則在 上述範圍的下限時甚至可有效地使用適度之溫度。 如果使用上述範圍的下限時之溫度(即於此情況α氧化銘 尚未形成),則必須使經爆炸性粉碎之物料歷經另外之燒結 操作來完成轉化成Λ相及(必要時)燒緒該物料達基本上理 論之密度(通常獲得超過9 5 %理論値)。雖然此操作包括另 外之費用,但是它卻容許使用堅固得多且價廉得多之旋轉 爐材料以便將所有操作同時在碳化矽管(彼等是爐之標準零 件)中予以實施。 典型係將溶膠··凝膠氧化鋁在低於大約2〇〇°c之溫度下乾燥 ,更佳在甚低的溫度下,例如自大約75。至大約i75。〇。 如上文中業已指示,極需要規定:將經過乾燥之溶膠-凝 膠物料的大顆粒儘可能快速加熱而獲得極大之膨脹和爆炸 生粉碎圖2中以簡化正視圖和邵份截面圖所舉例說明之装 置全然適合符合此等要求。將直徑爲大約〇 5至大約1厘米 之溶膠·凝膠氧化鋁的未經壓碎之乾燥顆粒饋送入加料漏斗 1中,自該處將它餚送通過一具振飼機2而進入二次加料器 3。此二次加料器將顆粒加進一個液流噴射器4中,它復使 用通過口5進人之壓縮空氣氣流來加速顆粒,它攜帶顆粒通 過支導管6而進入具有上端和下端之一只旋轉爐7中,在 點8上’接鄰爐内之熱區。於使用時,當彼等進入熱區時, 顆粒就爆炸,而經粉碎之顆粒則自爐的下端9出口。 在爆炸粉碎方法巾,加熱㈣之凝膠塊較佳地快速 L.----------s—------、玎------f (請先閲讀背面之注意Ϋ項再填寫本頁)
經濟部中央標準局貝工消费合作社印製 A7 -_____ B7 五、發明説明(8 ) " ' ~、- 而獲得最大之爆炸效果。雖然除去圖2中所舉例説明者以外 ’數種爐設計可能適合符合此項要求,但是用以進行本、 法之極適合爐是旋轉爐其中包含與水平線成—個角度而= 傾斜之一支管并環繞其軸旋轉,該管係經由外部所施加之 熱予以加熱。管的旋轉保證了管内之塊或顆粒呈恆定移動 因此使不會將一部份的塊或顆粒經由與管接觸予以加熱而 排除另一部份。旋轉之速率和管之傾斜角決定在爐内之滯 留時間。較佳地,調整此等參數來保證:來自結塊内部之 可蒸氣化之物料的蒸發快速發生而非逐漸發生。此方式是 使在結塊之爆炸碎裂後所形成之顆粒能耗費最多之時間燒 結和稠化。 視需要,可使用之其他爐設計包括視需要具有流體化床 之分批爐及具有微波或感應加熱之爐。 随同燒結氧化鋁所須要溫度之等級的燒結溫度而使用之 一具旋轉爐合宜地具有一支碳化矽管。這是因爲其持續本 方法的物理要求之能力包括沿著長度之溫度變更及在沿著 管長之不同點上之不同負載。碳化矽亦能耐受可能產生之 任何酸性氣體,舉例而言,當清除硝酸鹽殘渣時。 然而’如果意欲在低於完全燒結發生時之溫度下進行爆 炸性粉碎幷轉化成α形式,則可能使用能耐受高達大約 l2〇0°C溫度之金屬合金例如英高鎳("Inconei") 〇 使用一只旋轉爐,本發明的方法需要自大約1秒至大約30 分鐘的滯留時間在熱區中,較佳地自大約2秒至大約20分鐘 。爲了獲得此等滯留時間,管的仰角較佳地是自大約Γ至 _____ -11 - 本紙張尺度適用中國國家梂準(CNS ) Μ規格(210X297公釐)~~ (請先閱讀背面之注111^項再填寫本頁) 裝. 訂_ 經濟部中央揉準局員工消費合作社印製 12- A7 B7 五、發明説明(9 ) 大約60。而更佳是自大約3。至大約2〇。而旋轉之速率較佳 地是大約0.5至大約20每分鐘轉數(rpm)且更佳是自大約1至 大約15 rpm。 當燒結經過晶種之溶膠-凝膠氧化鋁時,旋轉爐的熱區中 之燒結溫度通常是自大約4〇〇°C至大約1500°c而更佳是自大 約600°C至大約140(TC。就未經過晶種之溶膠_凝膠氧化鋁而 言,較佳地將熱區維持在自大約4〇(rc至大約165(rc之溫度 下而更佳是自大約600°C至大約1550X:。 經由本發明的爆炸性粉碎方法所獲得之顆粒具有顯著之 縱橫比的趨勢,即:彼等具有實質上較長於任何其他者之 一個尺寸。在塗佈之摩擦應用用途方面,此等顆粒特別有 用。 本發明的方法可應用於所有型式的溶膠_凝膠顆粒生產, 尤其是意欲將此等顆粒用於摩擦應用用途。可將溶膠-凝膠 晶種或不晶種,所使用之條件的唯_差収;當溶膠-凝膠 晶種未予晶種時,通常需要較高之燒結溫度。 因爲本發明的方法容許去除掉先前技藝的典型之物理粉 碎階段,所以可崎經過乾燥之㈣直至自乾燥器馈送入 爐中。此方式節省相當多的時間和能量成本。 實施例説明 本發明的方法現在特別參照燒結一具旋轉爐中之經過晶 種之溶膠-凝膠氧化銘予以欽述。此等實例僅係爲了舉例説 明之故幷無意欲含有對於本發明之基本範圍加以必要之限 本紙張纽適用中國ΐ家標準(CNS )
經濟部中央標秦局貝工消費合作社印製 A7 B7 五、發明説明(l〇 ) 制的意思。 實例1 將74,657克的脱離子水和經由添加6,000克的晶種在脱離子 水中的6%漿體至10,〇〇〇克之脱離子水中所造成之具有大約 120平方米/克的BET表面面積之沈氧化铭晶種的漿體加進一 只「如斯」(ROSS)混合器中。亦添加勃姆石(係由德國「康 地亞J (Condea)公司出售,註册商標名,,Disperai”)其數量是 36.00仟克并將混合料抽空幷攪動歷5分鐘。然後添加丨,671 克的70%硝酸在5,014克之脱離子水中之溶液同時維持經攪 拌之混合物在眞空下幷予以攪拌歷另外5至1〇分鐘。然後放 釋眞空并將混合物經由使該混合物通經—個線内混合器-勾 和器同時將1,671克的70%硝酸在5,014克之脱離予水中之溶 液注射入該混合物中予以膠凝。 將凝膠乾燥幷碎裂成大小自大約〇 25厘米至〗厘米的塊狀 物幷採此等塊狀物饋送入一具爐中。將經過乾燥之溶膠-凝 膠塊直接饋送入一只旋轉爐中,此爐包含長度爲213厘米而 直徑爲15厘米之—支碳化矽管,具有經維持在〗4〇5乇下之 一個50厘米熱區。該管與水平線成6。之傾斜幷以每分鐘大 約18轉而旋轉。 將塊狀物爆炸性粉碎成一段範圍的顆粒大小,自其中分 離出5 0 T大小之砂粒供物理試驗用。所燒結之物料通過旋 轉爐(所須)之時間t大約1至2分鐘。經燒結之砂粒具有超 ^3.8克/互方厘米〈密度幷包含直徑$大約微米之氧化 鋁的微晶。 > X297公釐> —l· n· n n n ^ ^ n I n d I .^1 T > M3-·" (請先閲讀背面之注意事項再填寫本頁) 經濟部中央棣準局貝工消費合作杜印製 A7 ____ B7_ 五、發明説明(η ) 爲了比較之故’將相同溶膠_凝膠調配物以相同方式予以 乾燥,輥碎而產生負24篩孔顆粒,然後在以習知之方式在 一只習用之旋轉爐中予以燒結前,將顆粒在大約8〇〇Ό下烺 燒。 然後將兩種樣品使用精確相同數量之砂粒,背材,接合 器和漿液塗佈組成磨擦帶。每條帶每平方米的表面面積攜 帶590克的砂粒且每條帶是6 4厘米寬和ι52 *厘米長。將此 等帶子以每分鐘9,000表面米速率運轉幷使用在施加68仟克 的力時在水冷卻劑下來切割一支3〇4不銹鋼條歷4分鐘。 在此段時間内,使用習用之砂粒所造成之帶切割7 4克而 使用經過爆炸性壓碎之砂粒所造成之帶切割9 4克,或較習 用之帶,改進2 7 %。 實例2 使用實質上如圖2中所述之裝置,將在室溫下具有大約 +24T大小之經過晶種之溶膠-凝膠氧化鋁的乾燥塊以每小時 大約2.25至大約4.5仟克之速率直接饋送入經維持在1〇〇(rc 下之旋轉爐的熱區中。除去將爐管以大約1〇 rpm(每分鐘轉 數)旋轉幷與水平線成大約7。之傾斜外,此爐與實例1中所 使用者相同。將凝膠顆粒在該爐中爆炸性粉碎幷將粒子大 小分佈列入下表1 ----------f 裝------訂 (請先閲讀背面之注意事項再填寫本頁) -14-
7 B 五、發明説明(12 ) 表 1 大小範圍 範圍中之數量 • +30 41% -30+40 31% -40+50 11% -50+60 3% -60 4% (請先閲讀背面之注意事項再填寫本頁) 在一項分開操作中,將上述經過爆炸性粉碎之物料更進 一步燒結成具有大於3.8克/立方厘米之密度幷將經過燒結之 物料的大小範圍列於下列表2中。 -、-° 經濟部中央標準局員工消費合作社印製 大小範圍 範圍中之數量 +30 22% -30+40 3 8% -40+50 23% -50+60 9% -60 8% -15- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐)
Claims (1)
- ^ 經濟部中央標準局員工消費合作社印製 一種使含有經過乾燥但未經燒結之溶膠_凝膠氧化鋁之 組合物爆炸性粉碎之方法,該組合物具有以重量計至少 5 /〇之可揮發含量,此方法包括直接饋送該組合物之顆 粒進入經維持在約4〇〇 t至1600 X溫度下之—具爐中, 并控制在爐中之滯留時間而產生經過爆炸性粉碎之氧化 鋁顆粒。 根據申請專利範圍第丨項之•方法,其中該爐是一具管式 旋轉爐。 根據申請專利範圍第〗項之方法,其中在爐中最大溫度 區(熱區)中之滯留時間是自約1秒至約3 〇分鐘。 根據申請專利範圍第2項之方法,其中該管係以1至約 60°之角度與水平線成傾斜。 根據申請專利範圍第4項之方法,其中該管係以約〇 5至 約40 rpm旋轉。 6 ·根據申請專利範圍第1項之方法,其中經饋送至爐中之 •含有經過乾燥之溶膠-凝膠氧化鋁之組合物,係包含以 重量計約5至約6 0 %之可揮發物質。 根據申請專利範圍第1項之方法,其中係將含有經過乾 燥之溶膠-凝膠氧化鋁之組合物直接饋送至爐中熱區附 近。 根據申請專利範圍第】項之方法,其中在爐中之溫度和 淨留時間,係足以形成α相幷燒結達至少9 5 %理論値之 密度。 9 根據申請專利範圍第1項之方法,其中係將爐維持在低 2 4. 5. 7 8. 16- 本紙張尺度適用中國國家標準(CNS > Α4規格(210X 297公釐) (請先閱讀背面之注意事項再填寫本頁) 裝. 訂 A8 B8 C8 D8 經濟部中央標準局員工消費合作社印製 六、申請專利範圍 於燒尨氧化鋁所需要之溫度下,幷將經過爆炸性粉碎之 物料随後燒結達基本上理論密度。 1 〇 ·根據申4專利範圍第9項之方法,其中係使經過爆炸性 粉碎I物料接受壓碎方法,以在將其燒結之前,調整粒 子大小。 11. 根據巾請專利範固第9項之方法,其中係在使該粉碎物 料接受燒結操作前,將經過·爆炸性粉碎之物料使用選自 包括稀土金屬、過渡金屬、铷、铯、和釔之金屬之可溶 性鹽溶液處理。 12. 種使含有經過乾燥但未經燒結之加有晶種之溶膠_凝 膠氧化鋁之組合物爆炸性粉碎之方法,該組合物包含以 重量計約20至約40%之可揮發物料,此方法包括饋送該 組合物進入具有經維持在約6〇(rc至約〗5〇〇χ溫度下之一 個熱區之一只管式旋轉爐中,其中該爐管係與水平成 約2°至約20。之角度傾斜,及以約2至約2〇rpm旋轉。 ,1 3 ·根據申請專利範圍第〗2項之方法,其中在爐中之溫度 和滞4時間’係足以形成α相幷燒結達至少$ $ %理論値 之密度。 1 4 ·根據申請專利範圍第〗2項之方法,其中係將爐維持在 低於燒結氧化鋁所需要之溫度下,幷將經過爆炸性粉碎 之物料隨後燒結達基本上理論密度。 1 5,根據申請專利範園第1 4項之方法,其中係使經過爆炸 性粉碎之物料接受研磨方法,以在將其燒結之前,調整 粒子大小。 •17 本紙張尺度適用中國國家標準(CNS )八4規格(210Χ297公釐) /---請先閲讀背面之注意事項真填寫本莨) 裝· ,ιτ A8 B8 C8 D8 六、申請專利範圍 1 6 ‘根據申請專利範圍第1 4項之方法,其中係在使該粉砗 物料接受燒結操作前,將經過爆炸性粉碎之物料使用一 種金屬之可溶性鹽之溶液處理’該金屬係選自包括稀土 金屬、過渡金屬、你1、铯和纪。 、1 7 . —種使含有約20至約40%可揮發性物料之經過乾燥但未 經燒結之未加晶種之泛膠-凝膠乳化紹爆炸性粉碎之方法 ,此方法包括將經過乾燥之渣膠-凝膠饋入具有經維持在 約600°C至約1650°C溫度下之一個熱區之_只管式旋轉爐 中,其中該爐管係與水平成約3。至約20。之角度傾斜, 幷以約1至約20 rpm旋轉。 1S.根據申請專利範圍第17項之方法,其中在爐中之溫度 和滯留時間係足以形成α相幷燒結達至少9 5 %理論密度 1 9.根據申請專利範圍第1 7項之方法,其中係將爐維持在 低於燒結氧化銘所需要之溫度下,幷將經過爆炸性粉碎 之物料随後燒結達基本上理論密度。 20.根據申請專利範圍第19項之方法,其中係使經過爆炸 性粉碎之物料接受研磨方法,以在將其燒結之前,調整 粒子大小。 經濟部中央標準局員工消費合作社印製 •根據申請專利範圍第19項之方法’其中係在使粉碎物 料接受燒結操作前,將經過爆炸性粉碎之物料使用一種 金屬之可溶性鹽之溶液處理,該金屬係選自包括稀土金 屬、過渡金屬、#0、铯和釔。 22· —種經黏合之磨料’其包含已藉由根據申請專利範圍第 •18· 本紙張尺度適用中國國家標準(CNS ) A4規格(210XΜ公釐) A8 B8 C8 D8 經濟部中央標準局員工消費合作社印製 申請專利範圍 1項之方法予以爆炸性粉碎之磨料砂粒。 23_ —種經黏合磨料,其包 ^項之方法予以爆請專利範圍第 料1包含已藉由根據申請專利範圍第 頁万法予以爆炸性粉砗之磨料砂耘。 A -種經塗覆磨料,其包含已藉由根據^專 項惑方法予以爆炸性粉碎之雇料砂粒。 26. —種經塗覆磨料,其包含 ,2 Jg . μ, - Β由根據中請專利範圍第 12頁ι万法予以爆炸性粉碎之磨料砂粒。 27. —種經塗覆之磨料,其句令 ㈣Α包含已藉由根據申請專利範圍第 17項4万法予以爆炸性粉碎之磨料砂粒。 -19- 本紙張XJL適用中國囷家標準(CNS ) A4規格(210X297公釐) (請先閲讀背面之注意事項再填寫本頁)
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