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Dive into the research topics where Irmina Kris Murwani is active.

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Featured researches published by Irmina Kris Murwani.


THE 2016 CONFERENCE ON FUNDAMENTAL AND APPLIED SCIENCE FOR ADVANCED TECHNOLOGY (CONFAST 2016): Proceeding of ConFAST 2016 Conference Series: International Conference on Physics and Applied Physics Research (ICPR 2016), International Conference on Industrial Biology (ICIBio 2016), and International Conference on Information System and Applied Mathematics (ICIAMath 2016) | 2016

Synthesis and characterization of Zn doped magnesium hydroxyfluoride, Mg1−xZnxFOH

Johanis P. T. Djawa; Afifah Rosyidah; Harsasi Setyawati; Irmina Kris Murwani

A series of Zn-Doped Magnesium Hydroxyfluoride, Mg1−xZnxFOH) samples with 0 to 0.15 of x were prepared using a sol–gel synthesis and dried with vacuum technique. XRD characterization of the samples indicated the amorphous phase of Mg1−xZnxFOH similarity with MgF2. The Zn doped in magnesium hydroxyfluoride did not affected on the basic structure of magnesium hydroxyfluoride. The FTIR spectra showed the samples had a broad band at 3000-3700 cm−1 and 1620 cm−1 was indicated of adsorbed H2O molecules and a bridging hydroxyl groups, respectively. The intensity of the 460, and 550 cm−1 bands correlates to Mg-F and Mg-O vibrations. The Zn-O stretching vibration of Zn-doped magnesium hydroxyfluoride appeared at 1634 and 621 cm−1.


THE 2016 CONFERENCE ON FUNDAMENTAL AND APPLIED SCIENCE FOR ADVANCED TECHNOLOGY (CONFAST 2016): Proceeding of ConFAST 2016 Conference Series: International Conference on Physics and Applied Physics Research (ICPR 2016), International Conference on Industrial Biology (ICIBio 2016), and International Conference on Information System and Applied Mathematics (ICIAMath 2016) | 2016

Characterization of a series nickel doped magnesium hydroxyflouride Mg1−xNixFOH with XRD and FTIR

Rizkia Fitri Radityo; Afifah Rosyidah; Harsasi Setyawati; Irmina Kris Murwani

A series nickel doped magnesium hydroxyfluoride, Mg1−xNixFOH has been prepared by fluorolytic sol-gel method. The x values in these series were from 0 to 0,15. The samples structure was obtained as amorphous phase from XRD characterization. The XRD patterns showed any peaks like the mixing between magnesium fluoride (selllaite) and magnesium hydroxide (brucite). The IR spectra from FTIR characterization of Mg1−xNixFOH samples indicated the peaks of OH bridging at 3630-3000 cm−1, Ni-OH vibration around 660-650 cm−1 Mg-O vibration around 550 cm−1, and Mg-F vibration at 460 cm−1.


5TH INTERNATIONAL CONFERENCE AND WORKSHOP ON BASIC AND APPLIED SCIENCES (ICOWOBAS 2015) | 2016

The influence of dicarboxylic acids: Oxalic acid and tartaric acid on the compressive strength of glass ionomer cements

Ahmadi Jaya Permana; Harsasi Setyawati; Hamami; Irmina Kris Murwani

Glass ionomer cement (GIC) has limitation on the mechanical properties especially compressive strength. The change of compressive strength of GIC by adding oxalic acid and tartaric acid has been investigated. Oxalic acid and tartaric acid was added to the liquid components at concentrations of 0 – 15% (w/w). Powder component of GIC was made from optimum experimental powder glass SiO2-Al2O3-CaF2. GIC was characterized by compressive strength test, SEM-EDX and FTIR. The addition of tartaric acid to GIC has greater improvement than addition of oxalic acid. The addition of tartaric acid at 10 % (w/w) to GIC has greatest value of compressive strength.


Advanced Materials Letters | 2017

Preparation of dense BaxSr1-xCo0.8Fe0.2O3 membranes: Effect of Ba2+ substituents and sintering method to the density, hardness and thermal expansion coefficient of the membranes

Hamzah Fansuri; Muhammad Imam Syafi’i; Shofiyullah Romdoni; Alfia D. Masyitoh; Wahyu Prasetyo Utomo; Didik Prasetyoko; Nurul Widiastuti; Irmina Kris Murwani


QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT | 2017

PENATAAN PKL BEBAS BORAKS DAN FORMALIN MENUJU PRODUK UNGGULAN SEHAT DAN HIGIENIS

Afifah Rosyidah; Endang Purwanti; Djoko Hartanto; Irmina Kris Murwani; Didik Prasetyoko; Ratna Ediati


Jurnal Sains dan Seni ITS | 2017

Pergeseran 2θ pada Pola Difraksi Sinar-X Mg1-xNixF1,985(OH)0,015 Akibat Variasi x

Mohammad Irfan Arganata; Irmina Kris Murwani


Jurnal Sains dan Seni ITS | 2017

Pengaruh Doping Zn pada MgF1,985(OH)0,015 terhadap Difraktogram Mg1 xZnxF1,985(OH)0,015

Ummi Nazhiroh; Irmina Kris Murwani


Jurnal Sains dan Seni ITS | 2017

Sintesis dan Luas Permukaan Padatan Mg1-xCuxF1,985OH0,015

Gathut Mawahyu Jatmiko; Irmina Kris Murwani


Jurnal Sains dan Seni ITS | 2017

Pengaruh Impregnasi NiO pada MgF1,985(OH)0,015 terhadap Kristalinitas xNiO/MgF1,985(OH)0,015

Estu Kanthi Wilujeng; Irmina Kris Murwani


IPTEK Journal of Proceedings Series | 2017

Glycerol Acetylation Using Magnesium Fluoride Catalyst to Produced DAG and TAG

Qurrota A’yuni; Syafsir Akhlus; Harsasi Setyawati; Irmina Kris Murwani

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Didik Prasetyoko

Sepuluh Nopember Institute of Technology

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Djoko Hartanto

Sepuluh Nopember Institute of Technology

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Afifah Rosyidah

Sepuluh Nopember Institute of Technology

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Hamzah Fansuri

Sepuluh Nopember Institute of Technology

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Nurul Widiastuti

Sepuluh Nopember Institute of Technology

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Endang Purwanti

Sepuluh Nopember Institute of Technology

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Qurrota A’yuni

Sepuluh Nopember Institute of Technology

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Riyan Nazarudin Primy

Sepuluh Nopember Institute of Technology

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Rohmat Sulistya

Sepuluh Nopember Institute of Technology

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