TY  - GEN
CY  - UNIVERSITAS LAMPUNG 
ID  - eprints80874
UR  - http://digilib.unila.ac.id/80874/
A1  - Sophia , Yanti 
Y1  - 2024/12/12/
N2  - La(OH)?  telah  disintesis  menggunakan  metode  ball  milling  dengan  gas  hidrogen untuk  mempelajari  reaksi  mekanokimia  yang  terjadi  pada  material.  Proses  ball milling dilakukan dengan dua set parameter. Pada set pertama, tekanan gas hidrogen sebesar 9,39 bar, massa serbuk 8 gram, kecepatan 300 RPM, dan durasi proses 14 hari  dengan  total  waktu  milling  selama  96  jam.  Pada  set  kedua,  tekanan  gas hidrogen sebesar 2,34 bar, massa serbuk 2 gram, kecepatan 600 RPM, dan durasi proses  juga  14  hari  dengan  total  waktu  milling  selama  96  jam.  Selain  itu, serbuk yang  tidak  mengalami  milling  dianalisis  untuk  menyelidiki  morfologi  dan komposisi kimia La(OH)? melalui karakterisasi SEM-EDS, PSA, dan XRD. Proses mekanokimia  pada  serbuk  La(OH)?  melalui  milling  menghasilkan  perubahan signifikan  pada  morfologi,  ukuran  partikel,  dan  struktur  kristal.  Proses  milling menyebabkan  aglomerasi  partikel  namun  juga  menghomogenkan  ukuran  partikel yang awalnya terdiri dari dua populasi (100 nm dan 10.000 nm), menjadi rata-rata sekitar 344,7 nm (MT1) dan 375,0 nm (MT2). Selain itu, distribusi ukuran partikel menjadi  lebih  seragam  dengan  penurunan  PDI.  Milling  juga  mengurangi  ukuran kristalit, meningkatkan mikro regangan, serta menurunkan fase La(OH)? dari 94% menjadi  41%,  diikuti  dengan  kemunculan  fase  La  dan  H?  yang  menunjukkan perubahan dalam kristalinitas material. 
Kata kunci: La(OH)3, mekanokimia,ball milling, gas hidrogen.

La(OH)? was synthesized using the ball milling method with hydrogen gas to study the mechanochemical reactions occurring in the material. The ball milling process was  carried  out  with  two  sets  of  parameters.  In  the  first  set,  the  hydrogen  gas pressure was 9.39 bar, the powder mass was 8 grams, the speed was 300 RPM, and the process duration was 14 days with a total milling time of 96 hours. In the second set,  the  hydrogen  gas  pressure  was  2.34  bar,  the  powder  mass  was  2  grams,  the speed was 600 RPM, and the process duration was also 14 days with a total milling time  of  96  hours.  Additionally,  unmilled  powder  was  analyzed  to  investigate  the morphology and chemical composition of La(OH)? through SEM-EDS, PSA, and XRD characterization. The  mechanochemical process on La(OH)? powder through milling  resulted  in  significant  changes  in  morphology,  particle  size,  and  crystal structure. The milling process caused particle agglomeration but also homogenized the particle size, which initially consisted of two populations (100 nm and 10,000 nm),  to  an  average  of  approximately  344.7  nm  (MT1)  and  375.0  nm  (MT2). Furthermore, the particle size distribution became more uniform with a decrease in PDI.  Milling  also  reduced  the  crystallite  size,  increased  the  microstrain,  and decreased the La(OH)? phase from 94% to 41%, accompanied by the appearance of La and H? phases, indicating changes in the material's crystallinity. 
Keywords: La(OH)?, mechanochemistry, ball milling, hydrogen gas. 
PB  - FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM 
TI  - STUDI AWAL REAKSI MEKANOKIMIA SERBUK La(OH)3 MELALUI PROSES MILLING TERHADAP MORFOLOGI, KOMPOSISI KIMIA,UKURAN PARTIKEL, DAN STRUKTUR KRISTAL 
AV  - restricted
ER  -