alumina ceramics akwan horow abien a wɔfa so yɛ nneɛma .
Akwan a wɔfa so yɛ alumina ceramic nneɛma no bi ne dry pressing, grouting, extrusion, awɔw isostatic pressing, injection, casting, hot pressing ne hot isostatic pressing. Wɔ nnansa yi mfe mu no, wɔ fie ne amannɔne ayɛ filter molding, direct solidification injection molding, gel injection molding, centrifugal injection molding ne solid free molding mfiridwuma. Nneɛma ahorow a wɔde yɛ nneɛma, ne kɛse, ne nsusuwii a ɛyɛ den ne nea ɛyɛ pɛpɛɛpɛ no hwehwɛ akwan horow a wɔfa so yɛ nneɛma .
alumina ceramic prɛte .
Wɔde akwan abien a wɔtaa fa so yɛ alumina ceramics ba:
1, dry press molding: Alumina ceramic dry press molding mfiridwuma no yɛ nea ɛyɛ mmerɛw ne ne mu ɔfasu no mu duru a ɛboro 1mm, ne tenten ne ne kɛse nsusuwii nyɛ kɛse nsen 4:1 nneɛma. Akwan a wɔfa so yɛ nneɛma no yɛ nea ɛne ne ho hyia anaasɛ ɛyɛ akwan abien. Press no wɔ hydraulic type ahorow abien ne mfiridwuma mu su, a ebetumi ayɛ semi-a ɛyɛ adwuma anaasɛ ɛyɛ adwuma ankasa. Nhyɛso a ɛsen biara a wɔde mia no yɛ 200MPa. Output no betumi adu 15 ~ 50 asinasin wɔ simma biara mu. Esiane sɛ hydraulic press no nhyɛso a ɛyɛ pɛ no yɛ pɛ nti, ɛsono sɛnea afã horow a wɔde mia no no sorokɔ yɛ soronko bere a ɛsono powder a wɔde hyɛ mu ma no. Nhyɛso a mfiri a wɔde tintim no de ba no kɛse gu ahorow esiane powder a wɔde hyɛ mu ma no dodow nti, na ɛnyɛ den sɛ ɛbɛma nsonsonoe a ɛwɔ kɛse no mu no ayɛ kɛse bere a wɔayɛ no sintering akyi na ɛka sɛnea ade no te no. Enti, powder particles a ɛwɔ dry pressing process no mu a wɔkyekyɛ no pɛpɛɛpɛ no ho hia yiye ma nsusuwso a wɔde hyɛ mu ma. Sɛ́ ebia dodow a wɔde hyɛ mu no yɛ pɛpɛɛpɛ anaasɛ ɛnte saa no nya nkɛntɛnso kɛse wɔ alumina ceramic afã horow a wɔayɛ no dimensional pɛpɛɛpɛ so. Powder particles a ɛboro 60μm, ntam 60 ~ 200 mesh betumi anya maximum free flow effect, na ama wɔanya nhyɛso molding effect a eye sen biara.
2, Grouting Molding Method: Grouting Molding ne ɔkwan a wɔfa so yɛ nneɛma a edi kan koraa a wɔde yɛ alumina nkuku. Esiane sɛ wɔde gypsum nsusuwso di dwuma nti, ɛho ka no sua na ɛnyɛ den sɛ wɔbɛyɛ afã horow a ɛyɛ kɛse na ɛyɛ den. Ade titiriw a ɛwɔ grouting molding mu ne alumina slurry a wosiesie. Mpɛn pii no wɔde nsu di dwuma sɛ nsu a wɔde fa nsu mu, na afei wɔde degumming aduru ne binder no ka ho, bere a wɔayɛ no yiye awie no, wɔde gas no gu, na afei wɔde plaster nsunsu no gu akyi. Esiane sɛ nsu a ɛwɔ plaster nkuku no ntini mu no twetwe nsu nti, nsu a ɛyɛ fĩ no yɛ den wɔ nkuku no mu. Wɔ grouting a ɛyɛ tokuru mu no, ɛsɛ sɛ wohwie nsu a ɛboro so no gu bere a slurry a ɛtwetwe wɔ nkuku no fasu no so no du nea ɛho hia no mu. Sɛnea ɛbɛyɛ a nipadua no so bɛtew no, ɛsɛ sɛ wɔde nsu a ɛdɔɔso di dwuma sɛnea ɛbɛyɛ yiye biara.
Ɛsɛ sɛ wɔde nneɛma a wɔde ka ho nso ka alumina ceramic slurry no ho ma ɛyɛ anyinam ahoɔden a ɛbɔ ho abien wɔ slurry particles no ani sɛnea ɛbɛyɛ a slurry no bɛsensɛn hɔ a ɛrensiesie. Bio nso, wɔde binders te sɛ vinyl alcohol, methyl cellulose, alginate amine ne dispersants te sɛ polyacrylamide ne gum Arabic ka ho na ama slurry no ayɛ nea ɛfata ma grouting molding operation.
