Preparation of presintered zirconia blocks for dental restorations through colloidal dispersion and cold isostatic pressing

Noor Faeizah Amat, Andanastuti Muchtar, Muhammad Sufiyan Amril, Mariyam Jameelah Ghazali, Norziha Yahaya

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This work proposes an effective method for dispersion of zirconia suspension for dental block preparation and optimizes the cold isostatic pressing (CIP) pressure to improve the densification of slip-casted zirconia blocks. Two batches of 44. wt% zirconia suspension were prepared using distilled water in a pH 2 medium containing 0.5. wt% polyethyleneimine as dispersant. The first batch was sonicated for different durations (from 5. min to 30. min), and the second batch was dispersed through ball milling at rotational speeds of 200, 300, and 400. rpm for 60, 90, and 120. min. All suspensions were subjected to sedimentation test and particle size measurement. Results revealed that the optimum ultrasonication duration was 10. min, which yielded the smallest particle size of 133. nm. Ball milling at 300. rpm for 120. min achieved the maximum dispersion of particles, with an average size of 75. nm. Under the optimum conditions of ultrasonication duration, ball milling duration, and ball milling speed, the particle size decreased to 48. nm, which is close to the primary particle size. These dispersion techniques and parameters were selected for preparing a suspension to be consolidated into blocks through slip casting and were enhanced through CIP at pressure ranging from 100. MPa to 300. MPa. CIP compaction at 250. MPa significantly increased the shrinkage percentage of green zirconia blocks, with pore radius decreased to 18. nm. The density of zirconia pressed at 250. MPa and presintered at a low temperature of 950. °C was 59% of the theoretical density and was higher than that of commercial presintered blocks. Thus, CIP should be conducted under a compaction pressure of 250. MPa to produce dense and homogeneous zirconia blocks.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 1 Jan 2018

Fingerprint

Zirconia
Restoration
Ball milling
Suspensions
Particle size
Compaction
Polyethyleneimine
Densification
Sedimentation
zirconium oxide
Casting
Water
Temperature

Keywords

  • Ball milling
  • Cold isostatic pressing
  • Colloidal process
  • Ultrasonication
  • Zirconia

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

@article{7e7caa5f5d5e466e9066e57c388632d9,
title = "Preparation of presintered zirconia blocks for dental restorations through colloidal dispersion and cold isostatic pressing",
abstract = "This work proposes an effective method for dispersion of zirconia suspension for dental block preparation and optimizes the cold isostatic pressing (CIP) pressure to improve the densification of slip-casted zirconia blocks. Two batches of 44. wt{\%} zirconia suspension were prepared using distilled water in a pH 2 medium containing 0.5. wt{\%} polyethyleneimine as dispersant. The first batch was sonicated for different durations (from 5. min to 30. min), and the second batch was dispersed through ball milling at rotational speeds of 200, 300, and 400. rpm for 60, 90, and 120. min. All suspensions were subjected to sedimentation test and particle size measurement. Results revealed that the optimum ultrasonication duration was 10. min, which yielded the smallest particle size of 133. nm. Ball milling at 300. rpm for 120. min achieved the maximum dispersion of particles, with an average size of 75. nm. Under the optimum conditions of ultrasonication duration, ball milling duration, and ball milling speed, the particle size decreased to 48. nm, which is close to the primary particle size. These dispersion techniques and parameters were selected for preparing a suspension to be consolidated into blocks through slip casting and were enhanced through CIP at pressure ranging from 100. MPa to 300. MPa. CIP compaction at 250. MPa significantly increased the shrinkage percentage of green zirconia blocks, with pore radius decreased to 18. nm. The density of zirconia pressed at 250. MPa and presintered at a low temperature of 950. °C was 59{\%} of the theoretical density and was higher than that of commercial presintered blocks. Thus, CIP should be conducted under a compaction pressure of 250. MPa to produce dense and homogeneous zirconia blocks.",
keywords = "Ball milling, Cold isostatic pressing, Colloidal process, Ultrasonication, Zirconia",
author = "Amat, {Noor Faeizah} and Andanastuti Muchtar and Amril, {Muhammad Sufiyan} and Ghazali, {Mariyam Jameelah} and Norziha Yahaya",
year = "2018",
month = "1",
day = "1",
doi = "10.1016/j.ceramint.2018.01.035",
language = "English",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Preparation of presintered zirconia blocks for dental restorations through colloidal dispersion and cold isostatic pressing

AU - Amat, Noor Faeizah

AU - Muchtar, Andanastuti

AU - Amril, Muhammad Sufiyan

AU - Ghazali, Mariyam Jameelah

AU - Yahaya, Norziha

PY - 2018/1/1

Y1 - 2018/1/1

N2 - This work proposes an effective method for dispersion of zirconia suspension for dental block preparation and optimizes the cold isostatic pressing (CIP) pressure to improve the densification of slip-casted zirconia blocks. Two batches of 44. wt% zirconia suspension were prepared using distilled water in a pH 2 medium containing 0.5. wt% polyethyleneimine as dispersant. The first batch was sonicated for different durations (from 5. min to 30. min), and the second batch was dispersed through ball milling at rotational speeds of 200, 300, and 400. rpm for 60, 90, and 120. min. All suspensions were subjected to sedimentation test and particle size measurement. Results revealed that the optimum ultrasonication duration was 10. min, which yielded the smallest particle size of 133. nm. Ball milling at 300. rpm for 120. min achieved the maximum dispersion of particles, with an average size of 75. nm. Under the optimum conditions of ultrasonication duration, ball milling duration, and ball milling speed, the particle size decreased to 48. nm, which is close to the primary particle size. These dispersion techniques and parameters were selected for preparing a suspension to be consolidated into blocks through slip casting and were enhanced through CIP at pressure ranging from 100. MPa to 300. MPa. CIP compaction at 250. MPa significantly increased the shrinkage percentage of green zirconia blocks, with pore radius decreased to 18. nm. The density of zirconia pressed at 250. MPa and presintered at a low temperature of 950. °C was 59% of the theoretical density and was higher than that of commercial presintered blocks. Thus, CIP should be conducted under a compaction pressure of 250. MPa to produce dense and homogeneous zirconia blocks.

AB - This work proposes an effective method for dispersion of zirconia suspension for dental block preparation and optimizes the cold isostatic pressing (CIP) pressure to improve the densification of slip-casted zirconia blocks. Two batches of 44. wt% zirconia suspension were prepared using distilled water in a pH 2 medium containing 0.5. wt% polyethyleneimine as dispersant. The first batch was sonicated for different durations (from 5. min to 30. min), and the second batch was dispersed through ball milling at rotational speeds of 200, 300, and 400. rpm for 60, 90, and 120. min. All suspensions were subjected to sedimentation test and particle size measurement. Results revealed that the optimum ultrasonication duration was 10. min, which yielded the smallest particle size of 133. nm. Ball milling at 300. rpm for 120. min achieved the maximum dispersion of particles, with an average size of 75. nm. Under the optimum conditions of ultrasonication duration, ball milling duration, and ball milling speed, the particle size decreased to 48. nm, which is close to the primary particle size. These dispersion techniques and parameters were selected for preparing a suspension to be consolidated into blocks through slip casting and were enhanced through CIP at pressure ranging from 100. MPa to 300. MPa. CIP compaction at 250. MPa significantly increased the shrinkage percentage of green zirconia blocks, with pore radius decreased to 18. nm. The density of zirconia pressed at 250. MPa and presintered at a low temperature of 950. °C was 59% of the theoretical density and was higher than that of commercial presintered blocks. Thus, CIP should be conducted under a compaction pressure of 250. MPa to produce dense and homogeneous zirconia blocks.

KW - Ball milling

KW - Cold isostatic pressing

KW - Colloidal process

KW - Ultrasonication

KW - Zirconia

UR - http://www.scopus.com/inward/record.url?scp=85040237212&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040237212&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2018.01.035

DO - 10.1016/j.ceramint.2018.01.035

M3 - Article

AN - SCOPUS:85040237212

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

ER -